Re: [Elecraft] [Amps] Fwd: Re: FYI Visalia Attendees

[Vic Rosenthal 4X6GP]

About time!

73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 21 Apr 2017 00:03, Ed Muns wrote:


   Busted link.  Correction:
   [1]http://www.elecraft.com/images/visalia1.jpg
   73,
   Ed W0YK

References

   1. http://www.elecraft.com/images/visalia1.jpg

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Re: [Elecraft] [OT] Morse is back!!

[Vic Rosenthal 4X6GP]

And it even does SO2R.

73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 1 Apr 2017 20:17, Doug Turnbull wrote:

Dear OMs and YLs,
 We CW ops will be happy with this piece; Morse is back:

https://www.youtube.com/watch?v=1KhZKNZO8mQ



73 Doug EI2CN


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Re: [Elecraft] K2 main encoder wanted

[Vic Rosenthal 4X6GP]

Are you certain that a bit of fiber from the felt washer hasn't worked 
its way between the shaft and the bushing? That is a known problem.


73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 23 Mar 2017 11:41, Bob G3PJT wrote:

Hi Don

Thanks for the reply. I did know about the new encoder kit but the 
problem is that of its cost when it gets here.


Elecraft quote 124USD for the kit, that's £100 here which then gets 
VAT at 20% and a local handling charge - say a total of £130-140 and 
as well if I read things correctly I will need to get a new knob.


So you can see that my problem is that unless I can get a cheaper 
replacement I might as well sell the K2/100 either in bits for spares 
or at a discount.


The encoder does work fine but it has suffered a knock which has made 
it slightly stiff to turn, i.e it wont 'spin', but it is useable.


So thanks for the thoughts

73 Bob G3PJT






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Re: [Elecraft] FW: Using your tower as a vertical - 160 or 80

[Vic Rosenthal 4X6GP]

Regarding using a tower as a vertical:

Some years ago I had a 50-foot mast with a tribander on it next to my 
house. I ran two wires out my window, one down to the base of the mast 
and one to a point on it that produced a reasonable SWR on 80 meters. 
The rotor cable and feedline for the beam ran down to the ground, and 
then back up to the shack. No ferrites or anything on the feedline. I 
wrapped the rotor cable around a ferrite rod at the rotor controller. I 
had a system of 16 radials, each about 20' long, and in a half-circle.


I ran about 600 watts to this arrangement and didn't notice RF issues in 
the shack. It worked surprisingly well, producing contacts from here 
into the US as far west as Illinois.


73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 2 Mar 2017 05:21, Erik Basilier wrote:

Hi Alan,

Your link didn't work for me, but I assume your article describes how to
make a good bandpass filter. I do in fact recall seeing such an article in
QST years ago. Assuming that you were just pointing out that I can put a
bandpass filter on each feedline, as is common practice in SO2R operations,
I need to state my case in more detail:

Since I have second antenna covering 20-15-10 (a vertical), I started out
doing just that: putting a bandpass filter on each. I was in a hurry and
bought the LBS commercial filters rather than building based on the old
article. The antennas are close together, and even after I upgraded so as to
have two K3 radios, I was unhappy with the isolation with one K3
transmitting on 40 on the beam and the other K3 receiving on 20 on the
vertical. Just out of curiosity I plan to dig deeper into this situation, as
I think somewhat better results could be achieved. However, seeing the big
difference in performance on a given band between the vertical and the beam,
I really wanted both radios to have a beam. That is where I decided to get
the multiplexer (a model that includes 40m). Performance wise, this was
going to be like having one multiband beam, including 40m, for each radio.
Much better than using the vertical for one radio, assuming of course that
the physical sharing of one beam would aggravate the interference situation
I had when using separate antennas and bandpass filters. With the
multiplexer, per manufacturer's recommendation, each band still uses its
separate bandpass filter, so that total attenuation between bands is much
greater than what can be expected with bandpass filters alone. Still, I was
apprehensive of a possible increase in interference. The outcome was nothing
short of stunning: No interference at all. I see a possiblity that I could
have somehow reduced the interference experienced with separate antennas and
using bandpass filters, but I can't see that approach competing with the
superior results using a single antenna + multiplexer + bandpass filters.
The QST review backs up my assumption that the great results with that
configuration was no fluke. Of course, I cannot include 80m in the same
approach as long as I don't have a single antenna that includes that band
(and I can't quickly get a multiplexer that includes all 5 bands). So, for
80 I will have a separate feedline and just a bandpass filter. BTW I am very
happy to not have yielded to the temptation to upgrade my beam to a Steppir,
as the multiplexer approach requires the antenna to be tuned simultaneously
to multiple bands, not to tune to one band at a time.

If I had been able to achieve really good isolation with just a bandpass
filter for each band, your approach with an 80m antenna that also covers 40
would make good sense to my situation. As it is, keeping 40m within the
beam, even with no gain over running 40m on the second antenna, makes sense
as it allows me to route 40m not just through the bandpass filter, but also
through the multiplexer. Since I already tried an 80m inverted vee on the
tower, and it ruined the 40m performance of the beam, I am looking for other
approaches for 80m. It might be possible to change the beam to bring it back
to resonance on 40, but this particular beam is a complicated design
already. A sloper is one possiblity, but it is not likely to be my first
attempt, as it would be close to the beam and it would be somewhat similar
to the vee. At this point I am leaning toward either a separate shortened
vertical such as a Butternut model for 80 and 40 (not likely to use the 40
part) or using the tower itself as a vertical. For the latter approach I
would need to prevent the tower's feedline bundle (the part going into the
house) from forming part of the radiating element. I remember an old Antenna
Book discussing methods of feeding the tower as a vertical, but the author
seemed to ignore the issue of the cables coming off the tower. Maybe it was
assumed that the cables would be disconnected at the bulkhead whenever the
tower would be used as a vertical.  Nobody has replied to me about
experiences dealing with that issue. Also as the

Re: [Elecraft] Elecraft QSK

[Vic Rosenthal 4X6GP]

No, the real question is why doesn't Elecraft make a KPA1500!

I agree about the Alpha PIN diodes. I had an Alpha 86 for a few years, 
and never had any trouble with the PIN diodes -- and I made plenty of 
'antenna mistakes'. I sold it because I was tired of waiting the 90 
seconds for it to warm up, and I believed that Elecraft was about to 
release the KPA800 and 1500.


I suspect some of the PIN diode failures were due to static discharges. 
I had ICE antenna protectors that provided a good DC path to ground and 
a good lightning ground system. Or else I was lucky.


73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 1 Mar 2017 01:14, wb6r...@mac.com wrote:

The Elecraft KPA500 silent QSK is achieved without expensive PIN
diodes but rather with relatively inexpensive switching diodes. I’ll
guess that the 1500 watt Elecraft prototype amp of some years ago
used a similar inexpensive, silent design.

Avoiding QSK should be because of operator preference not because of
fear of relay failure. In the case of operating non-QSK, it’s vital
for the operator to keep calls short and not be caught in a cycle of
doubling with the DX that’s heard all too often.

My Alpha 87A of 17 years or so has never had a PIN diode failure.
When the 87A was first introduced there were indeed PIN diode
failures. This was attributed to a bad batch (or batches?) of PIN
diodes. Subsequent runs of 87A's ceased to exhibit PIN diode
failures. Yet the urban legend persists that 87A’s should be avoided
because of the PIN diodes - which are expensive to replace.

The real question is why amplifier manufacturers continue to use
vacuum relays when inexpensive switching diodes can do the job. Thank
you Elecraft.

73 - Steve WB6RSE

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Re: [Elecraft] Elecraft K2/10 Build and a lesson learned.

[Vic Rosenthal 4X6GP]

Many moons ago when there was a K2 but no KPA100 I wanted to drive an 
amp with my K2 and I needed a few more watts. I made some modification 
(I don't remember the details) that allowed it to produce more than 20 
watts, which made a big difference in output from my amp. I operated for 
a while like that until the KPA100 came out, and it didn't seem to hurt 
anything.


73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 26 Feb 2017 01:02, Cameron Francey wrote:

Hi All,

I Just finished my Elecraft K2/10 build.  I have lots of options to
add but the basic K2/10 is now working and I'll let it settle in for
a week or so to make sure its all ok before adding any options.


I started this build at the end of January, taking care to sort and
identify all the parts, especially the fixed value capacitors so it
made life much easier to select the correct values efficiently during
the build.

Everything went well, got the phase 1 and 2 tests done, added the
remainder of the components to finish phase 3 and then when I got to
the transmitter alignment step I noticed that rather than about 2
watts out as expected it was over 20 watts!  Gee, what was wrong I
thought to myself?  I had a quick look over everything, made 100%
sure all the components were installed correctly etc, but couldn't
find anything wrong.  I even re-counted all the transformer winding's
and made sure they were all installed correctly.  Nothing looked out
of place.


Having recently built two K1's and a K2/100 with KAT100 and nearly
every option available I knew it had to be something I had done
wrong.  So I kept my logic head on and decided after my initial
disappointment and re-checking my work that a break away from the
bench was a good start.


Back to the bench this morning with a fresh mind I suspected that my
issue was somehow with the components that either set or control the
power level,  and my reason for thinking that was because the issue
was present on every band and the power control pot made no
difference to the output power, and RX wise it was performing really
well so that eliminated a lot of the sections.  Thinking about ALC or
the power control circuit on the control board I decided that was
where to start and work outwards from there.  I knew the transmit
section of the main RF board was in good shape since it was capable
of producing more than 20 watts into a dummy load!


So, I read the circuit diagram, pulled out the control board and
started to trace the ALC circuit though the board.. That's when I
found my problem, I couldn't believe how stupid I had been and missed
soldering pin 2 of RP 3 on the Control Board, which is the ALC
feedback loop.  After soldering that and re-testing all was well,
phew!!!


Where the lesson was learned was even though I'm close to obsessive
compulsive when identifying and selecting each component and double
checking twice before soldering anything, then checking with a
magnifying glass that the joints look good I still somehow managed to
let that un-soldered pin go unnoticed!


I don't think I have caused any adverse effects to the PA section
driving it so hard.  The short periods of transmitting at about 23
watts never caused them to heat up.  Its interesting that the PA
produced over 20 watts, so the 15 watts max output under normal
conditions seems quite a conservative level for those 2SC1969's.


Just thought I'd share my stupid mistake with the readers here and
that even being really careful things can still slip through the
net!



Best Regards,

Cameron, AF7DK/GM7LQR

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Re: [Elecraft] K3 Receiver Mush

[Vic Rosenthal 4X6GP]

I had a problem with clicks on return to receive with older firmware, 
quite a while back. Make sure you have the latest FW. Wayne fixed a bug 
which made a big improvement.


73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 22 Feb 2017 22:06, Ed G wrote:


When I change the AGC settings to those recommended to minimize the mush:

* AGC THR: increase to at least 8

* AGC SLP: decrease to 8 or even less

* AGC DCY = SOFT (not default=NOR).

It seems to my ears that I am hearing louder clicks when the K3 switches
back to receive (CW of course). I know the clicks were a problem lots of
folks commented on a few years ago.

--Ed--

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Re: [Elecraft] K3 Receiver mush

[Vic Rosenthal 4X6GP]

I remember this, and had forgotten what I set them at. I just looked and 
I see that I have SLP=003 and THR=14! That is practically no AGC at all. 
In contests I sometimes turn up the SLP to protect my ears, but for 
normal DXing this is what I've gotten used to and I like it.


73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 22 Feb 2017 09:42, Ian White wrote:

Re-posting from April 2016, and earlier:

73 from Ian GM3SEK


***

The factory default AGC THReshold for the K3 and K3S is very, very low.
Measurements by KE7X [1] have shown that the default setting of THR=5
corresponds to an AGC onset at less than S3, whereas competing rigs have
a threshold of S7 or even higher. This very low AGC threshold is what
allows the AGC to be activated by band noise.

Elecraft's factory defaults of THR=5 and SLP=12 compress all signals
above the AGC threshold into a very narrow range of audio output levels
[see the measurements by KE7X]. This makes for comfortable
broadcast-style listening - but there is price to be paid. The default
settings tend to hide the real-life differences in the strengths of
incoming signals - important differences that DXers and contesters
*need* to hear, in order to pick individual signals out of a pileup.

Following complaints from DXers, DXpeditioners and contesters about this
so-called "pileup mush", and following further series of measurements by
KE7X, Elecraft eventually did increase the available range of AGC
THReshold settings (the v4.51 firmware upgrade).

Following the release of FW v4.51, the consensus within the
[K3-contesting] Yahoo group about the most important settings for DXing
and contesting has been as follows.

* AGC THR: increase to at least 8 (from default = 5) and preferably to
12, and then take some time to become re-accustomed to the increased
range of audio levels [2]. (Some users recommend as high as 14, if your
ears can handle it.)

* AGC SLP: decrease to 8 or even less (from default = 12). Lower SLP
settings allow stronger signals to sound somewhat louder, and thus more
realistic, but the range of variation will be partly determined by the
THR setting already made; so always experiment with THR first, and with
SLP afterwards.

* AGC DCY = SOFT (not default=NOR). The User Manual claims that "The
SOFT setting can reduce IMD caused by traditional AGC, and is especially
useful in 'pileup' conditions, in some cases making it unnecessary to
turn AGC off."

The settings recommended above have essentially solved the problem of
"pileup mush" for those who have tried them... but regrettably, Elecraft
has done almost nothing to make DXers and contesters  aware that such
changes are possible.

More than 3 years after the firmware release notes boasted that v4.51
"greatly improves signal clarity in pile-ups and other high-noise or
dense-signal situations, especially with threshold set to 12 or higher",
that information is *still* missing from the User Manual. There is also
no information on how to create different 'profiles' of AGC settings for
different types of users.

Meanwhile, Elecraft's factory AGC defaults remain exactly as they were,
still optimized apparently for comfortable 'listening', while many DXers
and contesters remain unaware that their K3/K3S could actually be *so*
much better.



[1] http://www.ke7x.com/home/miscellaneous-k3-information

[2] It is important to give any increased AGC THReshold setting an
extended trial. To anyone accustomed to an artificially restricted range
of audio signal levels, a higher setting will initially sound quite
'aggressive' - even though the new setting is much closer to real life.

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Re: [Elecraft] (OT) Follow-up on CW Resonant Speaker

[Vic Rosenthal 4X6GP]

I built one once with a 2-1/2" (6.4 cm) diameter PVC tube. Unfortunately 
I don't remember the exact length, but it was about 7" (18 cm) long. I 
simply glued a 2-1/2" speaker to one end. It resonated at about 600 Hz.


At one point I placed a tightly fitting lid from a spray can over the 
back of the tube and the speaker. It became significantly louder.


My experimental 2 cents.

73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 19 Feb 2017 01:32, David Anderson via Elecraft wrote:

Stan,

Thanks for the video, most impressive.

I have one comment regarding the need for an amplifier with the KX1
/KX2 or KX3 radios, there is another YouTube video from a couple of
years ago that appears to be almost what the more recent QST article
is based upon and in it the constructor has it connected to a KX1 and
it seems loud enough.

https://youtu.be/4iNELueaU6M

Then there is another video where another constructor dissects the
original commercial design and makes one, this really shows how
efficient the design is when at the end he compares the bare speaker
on its own and how weak it sounds compared to when it resonates.

https://youtu.be/MF8bk6958Hg

The key seems to be that in both of the above cases the lower part of
the resonant speaker is + not + sealed completely, air is allowed to
enter and exit, though there is sound deadening material in the
cavity. Perhaps that explains the greater sound efficiency?

This is something I plan to investigate myself with my KX3, once I
get the parts here, of course being in the UK we are now metric and
so some slight adjustments are necessary as our pipe is 50mm and so
on. A friend has offered the services of his laser cutter and 3D
printer which will come in handy too!

73 from David GM4JJJ


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Re: [Elecraft] Feature Request: improved internal keyer and CW PTT behavior

[Vic Rosenthal 4X6GP]

If Wayne will be tearing up the code in this area, it might not be hard 
to fix the problem that the internal keyer weighting is much heavier in 
PTT mode than in QSK or semi-QSK VOX.


73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 14 Feb 2017 12:50, Igor Sokolov wrote:

May be Elecraft can also look at the 8 msec PTT delay which cannot be
made longer without distorting CW. Some of the apmplifiers are not that
quick.


73, Igor UA9CDC


14.02.2017 10:52, donov...@starpower.net пишет:

Okay, lets take Eric's lead and open an interesting thread directly
related to an excellent Elecraft product.



For years many of us have suffered with the odd behavior of the K3
in CW PTT mode. There are at least two inexplicble aspects of K3
CW PTT behavior that have forced many of us to use external
Winkeyers rather than the poorly designed internal K3 keyer logic
when the K3 is in CW PTT mode.


For CW contesters, its necessary to operate the K3 in PTT mode
to avoid unwanted VOX delay. But for some strange reason the
K3 always applies VOX delay after external PTT is unasserted.
I can think of no logical reason why VOX delay should be applied
at the end of the external PTT input when the K3 is PTT mode or
any other mode. When PTT is unasserted, the K3 should always
immediately return to receive mode, no exceptions.


When using the internal K3 keyer when in PTT mode, for some
inexplicable reason the K3 behaves like its in QSK mode. The
only way to avoid this is to use VOX rather than PTT mode or
to use a foot switch when in PTT mode. Both alternatives
are unacceptable.


The band aid solution many contesters use with excellent results
is to avoid using the internal K3 keyer and to use an external
K1EL Winkeyer that generates both a key output and a PTT
signal generated according to well designed Winkeyer CW PTT
logic.


Why can't the K3 implement logic similar to the Winkeyer to
generate the equivalent of "Winkeyer PTT" when using the K3
internal keyer when the K3 is in PTT mode?


73
Frank
W3LPL
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Re: [Elecraft] Tuning procedure for KX3, KXPA100 and KAT500?

[Vic Rosenthal 4X6GP]

Open the matching box at the base of the R9 and look around the toroids. 
My R8 (same box) had an arc when using high power where the wire was 
attached to one of the toroids. I stuck a piece of polystyrene between 
the wire and the toroid to fix it. You might have to unsolder the board 
from its connections to get it out of the box in order to see and fix this.


In my case it only occurred on 40m so it could be the same problem.

73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 29 Jan 2017 05:06, Kenneth Christiansen wrote:

Hi to the group.

I promised to let you folks know what I came up with on my friends
KX3, KXPA100, and the R9 vertical.

He got the KX3, KXPA100, and KPA500 back from Elecraft all repaired.

I put the station together and this time set all 120 frequency-SWR
memories at the 20 watt level. They all set up OK and at that point
we went to lunch feeling good that all the problems were gone.

We came back and started using the KPA500 on various frequencies. Any
frequency we tried from 20 meters to 6 meters worked just fine at the
500 watt level.

On 40 meters any power over 400 watts would give a fault on every
piece of equipment (KAT500, KPA500, KXPA100 and an ANT ERR on the
KX3.

On 80 meters the faults would come on at anything over 300 watts.

I felt the faults were quite violent so that more than likely
explains how all three pieces of equipment got destroyed.

I studied the R9 which I put together last fall. On 17 meters through
6 meters there are stubs for each band and no loading coils involved.
On 20 meters there is a trap so again no loading coils. On 40 meters
there is a trap and a loading coil and on 80 meters there is another
trap and loading coil.

I noticed on 40 and 80 I could get them to tune to low SWR with the
KAT500 but if I started sending my call the KPA500 would start
showing more power and soon go into the violent fault.

Years ago I had a hustler vertical that would change the matched
frequency as the coil heated up and I think this R9 is doing the same
thing. Our solution is to run no more than 400 watts on 40 meters and
no more than 300 watts on 80 meters.

The specs for the R9 say it can handle 1500 watts and I suspect it
can on the higher bands but at least this antenna can not on 40 or 80
meters.

I came home and tried my camping KX3 and KXPA100 with my KAT500 and
Hy-Gain HY-Tower vertical and it seems to work well in any of the
memory position which I earlier set with my K3S and KPA500 so I feel
we have isolated the problem to the R9 my friend is using.

If anyone is able to use an R9 at higher power on 80 or 40 please get
back to me and let me know how you are doing it.

To everyone else thank you for the band width and suggestions.

I consider this closed.

73

Ken W0CZ w...@i29.net


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Re: [Elecraft] Just bought a K3/10. What upgrades should I get?

[Vic Rosenthal 4X6GP]

He said he is a CW guy, so I would recommend the new synth just for the 
cleaner QSK and less jitter at higher speeds.


73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 29 Jan 2017 03:31, Bill Frantz wrote:

The new synth is a definite improvement, but if you aren't working in
crowded conditions (DX pileups or contests), the old one is not bad.

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[Elecraft] Very short 80m antenna

[Vic Rosenthal 4X6GP]

Today I am limited to the bands from 7 MHz and up and I want to get on 
80m. My space is very limited, and in particular (due to the need to 
rotate my existing dipole), there is no way to put up a vertical more 
than about 3m high, and no room for radials longer than a few meters.


But the location is 35m above the ground and it is possible to add 
another rotatable horizontal dipole to my mast.


So I am thinking about a 6m long dipole made of aluminum tubing. I have 
some that is about 20mm in diameter. I will make capacity hats for each 
side to add some end loading.


Yes, I know the bandwidth would be very narrow. But I could live with a 
3:1 SWR bandwidth of 30 kHz.



I'm thinking about two possible configurations for loading coils: one 
coil in the middle, or two coils, each about halfway down each side of 
the dipole.


I know that two coils would produce a more efficient antenna. But the 
one coil in the middle has two big advantages: it would allow me to feed 
the antenna via an isolated link, which would solve the common-mode 
problem without requiring a balun, and it would allow for easy tuning 
and matching.


So what do you antenna experts think? One or two coils? Or is it just 
crazy to expect anything from such a short antenna?

--
73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/
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Re: [Elecraft] best agc setting for the k3s

[Vic Rosenthal 4X6GP]

Without being judgmental :-) this is bad advice. SLP 0 and THR 20 in 
effect turns off AGC. Maybe there are times when you want to do this, 
but probably not in a contest, when you want to protect your ears.


73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 9 Jan 2017 22:48, Dave Hachadorian wrote:

Here are my settings:

dcy soft
hld .2
pls nor
slp 0
f 200
s 20

threshold:
CW - 20 for max dynamic range to separate callers in a pileup
SSB - 15 to prevent harsh sound of thr 20
RTTY - 10 to prevent overdriving the sound card on loud signals

Front panel AGC FAST, except SLOW on RTTY, as recommended by G3YYD

By the way, Elecraft guys, it would be nice if the AGC Threshold were 
remembered by mode.

Dave Hachadorian, K6LL
Yuma, Arizona


-Original Message-
From: NOEL POULIN
Sent: Monday, January 9, 2017 12:31 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] best agc setting for the k3s

Hi,
I am a new owner of a K3S.
I would like to know the best AGC SETTINGS  for the K3S
I mean  AGC DCY, AGC HLD, AGC PLS, AGC SLP,AGC THR.
I am not very satisfied with the default setting...
Most of the time I'm working CW, RTTY...in contests
Can somebody tell me about his best setting for these modes
Working only in contest .
Thanks
Noel

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Re: [Elecraft] Dummy loads for dummies

[Vic Rosenthal 4X6GP]

I'm using ladder line to feed a 20m dipole on all bands from 40-10m 
(actually, it even works on 6m). Using a dipole shorter than 1/2 
wavelength can be tricky, but it should work pretty well on the design 
frequency and higher. You will need to use a balanced antenna tuner, or 
an unbalanced tuner plus a balun.


There's an article about how I did this in this newsletter:


73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 27 Dec 2016 22:22, Paul C wrote:

Ok, I won't be using these resistors after all.  Thanks for setting
me straight.

It seems tuff to get going in QRP.  I thought I'd roll my own when
possible.  I am trying to keep things simple and economical, the QRP
spirit.

Here's another naive idea of mine:  I'm planning to use ladder line
too.  Now I'm waiting for the other shoe to drop, when I realize coax
will be my only practical choice.

Paul KG5KXG

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[Elecraft] P3 + VGA response

[Vic Rosenthal 4X6GP]

I like to narrow the span on my P3 to a few kHz when trying to break a 
split pileup. But I notice that the response of the VFO B marker to the 
VFO B tuning seems relatively sluggish in this case. It especially seems 
that way when viewed on the large display provided by the VGA card. This 
makes it harder to place the TX frequency in the correct spot quickly.


Are there any settings on the P3 that might improve this? Other ideas?
--
73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/
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Re: [Elecraft] KPA500 power output starts out low, then goes up

[Vic Rosenthal 4X6GP]

Hi Barthold,

Maybe the K3S output is ramping up slowly. Do you notice this with the 
KPA500 off? Running the TX Gain Calibration in the K3 Utility might help 
in that case.


73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 14 Nov 2016 00:51, Barthold Lichtenbelt via Elecraft wrote:

Hi All,



Maybe you can help with something that is baffling me. My KPA500 doesn't go
to full output until I have spoken my callsign (when trying to get through a
pileup) a few times. It starts off with 100 or so watts, and after a few
iterations rises to the full 500W output. I see this both on the KPA500 LED
bar, as well as on the P3 PEP output monitored by P3TXMON.  My full setup is
K3S+KPA500+KAT500+P3+P3TXMON. All devices run the latest released firmware.



Any thoughts much appreciated!



Barthold

AD0RM

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Re: [Elecraft] TxMon and K3 (tuner bypassed) SWR missmatch

[Vic Rosenthal 4X6GP]

I have always understood that the SWR on a line will be almost the same 
wherever it is measured (it will increase slightly as you approach the 
load due to losses). It is the impedance of the load as transformed by 
the line that changes.


One thing that I've noticed is that SWR meters often differ when the SWR 
is low, because the amount of reflected power is very small, and diodes 
are often nonlinear dealing with small signals. The difference between 
an SWR of 1.1:1 and 1.2:1 is a very tiny amount of reflacted power.


73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 5 Nov 2016 04:43, Ron D'Eau Claire wrote:

How much coax is between the K3 and P3 monitor? Only a few feet will create
a growing error as the SWR increases, since the standing waves on the
coaxial line produce different readings at different points along the line.

If you want to compare the SWR meters in the K3 and P3, be sure the P3
sensor is mounted directly on the K3 without a length of coax in between.
Even so, the K3 SWR sensor will be "looking" at the P3 sensor through the
KAT3. Although it is bypassed, the older KAT3 ATUs still routed RF through
them on its way to the K3 rear-panel ANT connector.

Even so, as Fred pointed out, there will be differences since SWR meters are
no "precision" devices because they don't have to be. The K3 is quite happy
at load SWRs up to 2 or 2.5:1 and even above that the amplifier will protect
itself.

73, Ron AC7AC


On 11/4/2016 6:59 PM, dm...@nexicom.net wrote:


I recently installed the TX monitor in my P3 and have a discrepancy
with the SWR reading between it and the K3

with a dummy load connected the P3 and K3 read 1.12 and 1.0
respectively   a level of error that is to me quite acceptable.

however  when connected to an antenna  I will see the SWR on the K3
often close to 1:1   when the P3 will show up to a 1:2.   as the SWR
climbs above 1:2 on the P3  the K3 reading will track it fairly
closely but about a level of 1 below.  example
K3 1:1  P3 1:2,
K3 1:1.5  P3 1:2.5
K3 1:2   P3 1:3   and so on

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Re: [Elecraft] Antenna Question

[Vic Rosenthal 4X6GP]

SOME 'junk' PL259s are fine. If there are problems with the threads you 
will know right away. I have had some that are plated with something 
that won't take solder, or which have plastic insulation that melts when 
you solder the center pin. But again, you will know this right away.


SO239s and barrels may have contact tension problems that take awhile to 
manifest themselves. And elbows and Ts can have internal issues (like 
the famous elbows with little springs to join the two parts). For these, 
only Amphenol or mil-spec will do.


Having said all this, just before I moved here, I ordered a bunch of 
Amphenol connectors, including the PL259s.


73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 11 Oct 2016 11:38, Jim Brown wrote:

On Mon,10/10/2016 4:49 PM, Josh Fiden wrote:

If you're concerned about the additional loss of a barrel connector at
50MHz, you should be using feedline with lower loss than LMR400 up the
tower.


The loss in GOOD quality UHF connectors and barrels at 50 MHz is
negligible. There are urban legends (false, as usual) claiming that
every connector loses a dB. The grain of truth is that JUNK connectors
may introduce significant loss, but GOOD connectors and barrels do NOT.
"Good" means Amphenol 83-1SP for the PL-259s, and Amphenol or surplus
MIL-spec for the barrels.

Several years ago, I made up more than a dozen 100 ft cables using a
cable of somewhat better construction than LMR400 (Commscope 3227) for a
DX trip. The connectors were Amphenol 83-1SP that I soldered myself. To
test those cables, I spliced them together using Amphenol barrels and
measured the loss of about 1300 ft of cable up to 500 MHz using HP
generator and spectrum analyzer. The measured loss was LESS than the
manufacturer's spec. There were 27 83-1SPs and 13 barrels in line.

JUNK connectors are the shiny,unbranded stuff you see at ham flea
markets, and sold online and in ham magazines.

73, Jim K9YC

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Re: [Elecraft] Common mode chokes

[Vic Rosenthal 4X6GP]

Here is a device I made to do that:


73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 9 Aug 2016 23:56, MaverickNH wrote:

Just wondering - short of +/- RF Burns and Audible Noice, can one readily
detect/measure Common Mode Current on a coax antenna feedline?

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Re: [Elecraft] [OT] Antenna Question

[Vic Rosenthal 4X6GP]

A lot depends on the band. For example, your 20m vertical would have an 
SWR of only 8:1 on 17m. Loss with 50' of RG-58 would be about 2 dB. 
That's not insignificant, but a lot better than not being able to 
operate on 17m at all. The built-in K3 tuner would have no trouble 
matching it.


I am actually using a 20m dipole on 40. But my feedline is short (34') 
and it is 600-ohm open wire line. SWR is something like 85:1, and I am 
living with a loss of about 3 dB because it is a compromise solution 
that gets me a 7-band antenna in limited space.


73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 7 Aug 2016 06:57, rick jones via Elecraft wrote:

OK a very good reality check when you look at the numbers! So I'm
still trying to figure out the usefulness of a built in tuner. Two
situations come to mind: You have no feedline and are driving a wire
right out of your rig with a counterpoise (KX3 portable operations)
OR you are using it to just "touch up" the load on the PA from an
antenna that is close to resonance. I would hope that a good Elmer
would point out that a built in ATU does nothing more then keep your
PA happy but does nothing toward getting out a good signal AND that
if a tuner is necessary, a remote one is a better choice. Thanks for
your patience everyone while I get these concepts "right". Other
forums would not have been as accommodating.
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Re: [Elecraft] [OT] Antenna Question

[Vic Rosenthal 4X6GP]

The SWR on the coax when you are using a 20m vertical on 40 would be 
astronomical. I ran a quick EZNEC analysis of a 1/4 wave 20m vertical 
with its base on the ground and got an impedance of 6.9 - j348. This 
comes out to an SWR of about 187:1, which you would measure at the rig 
as only 18:1 due to the massive 13.3 dB loss in the coax. 100 watts in 
would give you something like 5 watts to the antenna.

Short answer: put the tuner at the base.

Of course, using a 20m antenna on 40 is about the worst case imaginable!

73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 7 Aug 2016 05:58, rick jones via Elecraft wrote:

Ok sorry for not providing enough info! Consider this scenario: I
have a portable vertical with 4 counterpoise wires that is resonant
on 20. Lets say I want to tune the antenna up on 40. I can have a
tuner right at the base of the antenna OR I can just use a balun at
the base of the antenna and use the built in ATU in the K3. Is there
a difference in how much power is getting to the antenna? I assume
the tuner at the base is the best option which always makes me doubt
the usefulness of having an ATU built in to a rig in terms of getting
the most power to the antenna. Am I on the right track? Thanks! Rick

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Re: [Elecraft] Cleaning a K3

[Vic Rosenthal 4X6GP]

I always cleaned computers (I worked for an agricultural software 
company and some of our customers' computers could have had crops 
planted in them) with a reverse-connected vacuum cleaner to blow the 
dust out. This must be done outdoors, of course!
You need to be careful not to spin fans with the air because it's 
possible to damage bearings with excessive RPM.


73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 27 Jul 2016 10:07, Bill Frantz wrote:
My K3 (and P3) were used in a very dusty environment in eastern 
Nevada. Some people there compared the dust levels to those at burning 
man. Does anyone have any advice about cleaning the equipment?


73 Bill AE6JV



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Re: [Elecraft] QSLs

[Vic Rosenthal 4X6GP]

I couldn't agree with Jim more!

I love LOTW and wish everyone would use it.

It's not just the cost of postage for the cards themselves. I am trying 
to increase my DXCC total and submitting confirmations by LOTW is so 
much easier than getting cards checked by the /one/ guy in the country 
who can do it, or mailing them to the ARRL in the USA and hoping that 
our troubled postal service will get them there and back.


73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 25 Jul 2016 21:49, Jim Brown wrote:

On Mon,7/25/2016 11:34 AM, stan levandowski wrote:

On my QRZ page it says "No LoTW, no eQSL and no Buro."


That may be your preference, but it causes everyone who wants a
confirmation from you to spend money with the postal system. When we
were kids, it cost a penny or two to send a QSL. Now, including the cost
of printing a card, it costs someone who wants your card more than $1
round trip (.49 each way) in the US, more than $2 between US and Canada,
average $3.50 to/from other countries.

LOTW and eQSL are FREE and easy to use if you're using almost any of the
popular logging software. Putting our logs on LOTW is the considerate
thing to do. It's the RIGHT thing to do. It's the modern equivalent of
what we said in the '50s -- "the last courtesy of a QSO is a QSL." Now,
the last courtesy of a QSO is an upload to LOTW.

73, Jim K9YC

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Re: [Elecraft] [OT] Strange noise - forgot to add

[Vic Rosenthal 4X6GP]

I should have added that sometimes what appears to be the same noise 
occurs when I am NOT transmitting.


73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 25 Jul 2016 20:05, Vic Rosenthal 4X6GP wrote:

Has anyone experienced this:

When I let the key up after sending a dash or two there is a "static
crash" which seems to start AFTER or just as I stop sending.

- It happens on various bands, but seems to happen more often on 30m or
20m.

- It happens whether I am running my K3 barefoot or with a kW amp active.

- It is intermittent. For example, this morning (6 am) it was bothering
me on 30m. Now (8 pm) I can't make it happen.

- On the P3 it looks like a series of horizontal lines extending across
the display. Sometimes it is very short in duration, but sometimes it
can go on for several seconds. You can imagine how annoying this is in a
DX pileup.

It is as if my RF is triggering an arc somewhere.

Could a CFL lamp do this?

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[Elecraft] [OT] Strange noise

[Vic Rosenthal 4X6GP]

Has anyone experienced this:

When I let the key up after sending a dash or two there is a "static 
crash" which seems to start AFTER or just as I stop sending.


- It happens on various bands, but seems to happen more often on 30m or 20m.

- It happens whether I am running my K3 barefoot or with a kW amp active.

- It is intermittent. For example, this morning (6 am) it was bothering 
me on 30m. Now (8 pm) I can't make it happen.


- On the P3 it looks like a series of horizontal lines extending across 
the display. Sometimes it is very short in duration, but sometimes it 
can go on for several seconds. You can imagine how annoying this is in a 
DX pileup.


It is as if my RF is triggering an arc somewhere.

Could a CFL lamp do this?
--
73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/
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Re: [Elecraft] Need advice on Small Tower

[Vic Rosenthal 4X6GP]

Hello Terry,

In my opinion, there will be no problem. I can imagine that if the tower 
is right at the house and if there is a strip of metal flashing along 
the peak of the roof it might detune the director slightly when the 
antenna is pointed east. Maybe. But I can't believe it will cause you 
any trouble. Anyway, with the tilt base you will have to install it some 
distance from the house.


Remember the tilt base and the rotor plus mast will add to the height of 
the tower. US Towers also makes a 55-footer. It's a lot more expensive, 
though.


I don't recommend the TA33-JR. Because of the short boom length it will 
have a narrow bandwidth on 20m. If you operate both CW and SSB you may 
find that you need to use a tuner. Your old ATB-34 is slightly bigger, 
but has a wider bandwidth.


There are newer designs for small beams that are better than the 
venerable TA-33.


Also if you can find one that works on 18 MHz too, that will be a plus. 
In the next few years, 10 and 15m will be dead much of the time.


73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 12 Jul 2016 04:21, Terry Brown wrote:

Hello all,

I am the owner if a K2, KX3, PX3, and KXPA100.  I have been a ham since
1982, and love my Elecraft gear.  I have a question for the group.  I am
moving from my current QTH in Corvallis, OR  after 30 years.  Currently I
have a Rohn 25 based tower that is about 35 feet above my flat roof.  On the
tower is a tri-band Cushcraft ATB-34 and 2m/440 comet antennas.  The beam
and tower  date from the time I became a ham.

I am building a new home in an established neighborhood in West Salem,
Oregon.  The CCRs have expired, so I am not restricted from a tower setup.
My new QTH is high in the west hills of Salem.   The view to the east is
amazing as the ground slopes away.  To the west, the terrain has a slight
rise.  I am 68 yrs. old.   I don't want to have to climb a tower again.  My
home will be two stories with the garage level under it.  The peak of my
roof will be about 34 ft. above grade.  My new tower location will be about
32 feet from grade to the peak of the roof.  The roofline will run N-S with
the tower on the west side of the house.  \

I have decided to purchase a new smaller lightweight crankup tower and a
smaller  tribander such as the Mosley TA-33 JR-N or NW.  I have seen the US
Towers MA-40,  a 20-41ft. crankup as one type.  It comes with a tilt over
base add-on which would allow me to service the antenna from the ground.
This particular two section tower can crank down to 20 ft., thus not being
visible from the street east of the house.  It's max height is 41 ft. which
would put the antenna only 9-10 ft. above the roofline when transmitting to
the East.  I want to put a winch on the tower so I don't have to physically
crank it up by hand as I get older.  With this background I have two
questions:

1.Will the yagi attached to the tower with only 9-10 ft. height above
the roofline (41 ft. tower)  be an effective radiator and receive antenna on
20-15-10 meter bands to the East?  Being on the West Coast, this will be the
direction of most of my mainland US contacts.   To the N-W-S, the antenna
will be 41 ft. above the ground, so no problem.

2.I am not committed to any particular crankup tower.  The US Tower is
just the one I have seen on the internet.  I would be interested in any
lighterweight fold over crank up tower up to 50 ft.   I think a tubular
constructed type tower would be my preference due to weight of installation.
A triangular designed crankup may be ok, too.

I know I can have a larger tower and antenna, but I want my setup to be
neighbor friendly.  I am not a contester, and will never operate over 100
watts.  It is nice to be able to work a station if I can hear it.  I also
want the advantage of a horizontally polarized antenna with gain.  I have
been spoiled with that setup over the years.

Just as an aside, my other antenna is a horizontal loop about 250 ft. in
length that I use for all the other bands.  It is up about 30 ft. suspended
from the trees in my current QTH.  I feed it with 450 ohm ladder into a 4:1
balun to coax.  At my new QTH, we will plant two contained planters with 20
or 30 ft. bamboo on the SW and NW corners of my property where I can put a
vertical pipe for two supports, then use the peak of my roof on the N and S
side at 34 Ft. for my NE and SE contact points for my other two corners for
my horizontal loop.  I will feed it with the same 450 ohm ladder from the NE
corner.   I really like my horizontal loop because it is so quiet being
horizontally polarized.  My current one works great so I want the same thing
for my new QTH.

I look forward to getting some great input from this group.  I have been
amazed at the level of quality information I have seen on this group.

Thanks in advance to you all.
73's,
Terry Brown, N7TB

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Re: [Elecraft] Help!

[Vic Rosenthal 4X6GP]

K3 I presume?
Make sure the front panel is plugged into the RF board correctly (i.e., 
not shifted over to one side).


73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 23 Jun 2016 19:59, Roger D Johnson wrote:

I just finished the connector mod and replaced some of the encoders. All
seemed
to go well until I noticed that NONE of the front panel LEDs were lit!

has anyone been down this road before?

73, Roger

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Re: [Elecraft] Elecraft] RFI on K3s

[Vic Rosenthal 4X6GP]

No, unfortunately.
There is a large Ace Hardware near me and places to buy building 
materials, but it's the not the same.


73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 21 Jun 2016 08:19, Fred C. Jensen wrote:

Home Depot is in Israel too?

Fred K6DGW

Vic Rosenthal  wrote:

Get some no. 10 stranded wire at Home Depot (etc.), double it over, put one end 
in a vise and the other in the chuck of your electric drill and twist away. Not 
shielded, but much better than parallel wires. I suppose you could strip some 
RG-8 if you really wanted to shield it.

Vic 4X6GP


On 20 Jun 2016, at 22:54, DGB  wrote:


Jim ... where does one find #10 twisted pair? Is it shielded?

thanks 73 Dwight NS9I


On 6/20/2016 12:59 PM, Jim Brown wrote:

On Mon,6/20/2016 10:33 AM, James Walker wrote:
Is it normal to register voltage as low as I’m seeing on my K-3?


What you're seeing sounds like IR drop in the DC cable. How long is the DC 
cable between the K3 and the power supply? What wire gauge? Is there any 
equipment (like distribution panel) in between?

This is a great application for a short length of #10 twisted pair between the 
PSU and rig.

73, Jim K9YC

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Re: [Elecraft] Krx3a

[Vic Rosenthal 4X6GP]

One of the really nice  features of the book by Fred Cady, KE7X, on the 
K3/K3S is that he has diagrams showing every imaginable setup of TX and 
RX antennas with/without the KRX3.


The book is available at

as a PDF, and Elecraft

has it as a paperback as well.

It is in my opinion one of the best K3 accessories you can get!

73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/

On 4 Jun 2016 22:23, Doug wrote:

Ok. I'm installing the rx in my k3.  But I'm not sure how to wire it
for connection to a antenna. It will be uses for split operation
dxing. Any suggestions will be appreciated   Wd8z. Doug


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Re: [Elecraft] Balun BL2

[Vic Rosenthal 4X6GP/K2VCO]

How hot it gets is determined by 1) the SWR and 2) the configuration of 
the antenna/feedline -- how much common mode power it has to dissipate.


I have a DX Engineering balun rated 5 kW continuous and 10 kW 
intermittent which /overheated/ on some bands when running 1 kW -- until 
I added capacitance or inductance on the antenna side of the balun to 
cancel out the reactance and at the same time detune the feedline for 
common mode current. Now it stays cold.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 27 May 2016 04:04, jso...@comcast.net wrote:

Hello,
I'm contemplating buying the BL2 balun.
It would be connected to 450-ohm transmission-line, which would go to a version of W1AB's 
"killer-antenna", sized for 20m on a 31' jackite-pole.

A reviewer of the BL2, on eham five years ago, commented about heat and 
signal-loss.
The heat and signal-loss concern me, not at the QRP-level but higher wattage.
I realize it is spec'd at 250 W but how hot does it get?

I've looked for data about insertion-loss for the BL2 and came up short there.
Hopefully someone has measured the insertion-loss and could share that data.

The "elecraft BL2 assembly and operating manual" has the cores as ferrite 
material.
But ferrites exhibit non-linear properties, so the loss may be a function, not 
only of frequency, but also drive-level.
Insertion-loss shows up as heat and that heat affects the properties of the 
ferrite.

As I wrote above, I'm not concerned about QRP operation.
If I put it into operation on FD and but take my KX3 home for the day, what 
happens if a club-member connects his 100+ W rig to the antenna-system to 
operate thru the night?
TIA for any reply.

73 Jerry KM3K
KX3 #6088

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Re: [Elecraft] KX2 haiku (attempt 1)

[Vic Rosenthal 4X6GP/K2VCO]

summer morning
K3 works all the DX
will KX2?

73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 24 May 2016 17:04, John Gibson wrote:

I must hike today.

My KX2 goes with me.

My link to the world.

73,
John Gibson, no8v


From: Elecraft  on behalf of Wayne Burdick 

Sent: Tuesday, May 24, 2016 12:36:13 AM
To: kev...@coho.net
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KX2 haiku (attempt 1)

:)


On May 23, 2016, at 9:23 PM, "kev...@coho.net"  wrote:


It is a small rig

Full of well thought out features

Many bands and modes


Kevin.  KD5ONS

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Re: [Elecraft] PTT KEY CONFIG setting volatile?

[Vic Rosenthal 4X6GP/K2VCO]

Which radio is it? I've never seen this on my K3.
If you are running some kind of rig control software, try it with the 
software not running.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 23 May 2016 05:51, Ken Arck wrote:

Sounds like a call to Elecraft tomorrow because this is repeatable!




At 07:42 PM 5/22/2016, Cady, Fred wrote:

That doesn't sound right.  I don't think mine has ever changed.
Cheers,
Fred KE7X


From: Elecraft  on behalf of Ken
Arck 
Sent: Sunday, May 22, 2016 4:23 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] PTT KEY CONFIG setting volatile?

I notice the PTT KEY selection under CONFIG doesn't appear to be
non-volatile as when the radio is power cycled, it always reverts to
OFF - OFF.  I'd like it to stay set to DTR -- RTS but it doesn't

Even if I leave 13.8 to the radio, turning it OFF and back ON and
that setting reverts.

Ken

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Re: [Elecraft] RX eq

[Vic Rosenthal 4X6GP/K2VCO]

The RX EQ doesn't seem to do much for me on CW because I am already 
limiting the response by the DSP bandwidth. Normally I use 300-450 Hz 
for tuning around, and then narrow the bandwidth as needed for weak 
signals or QRM. My passband is centered at 520, so I don't hear the very 
low and high pitched signals anyway. If I am calling CQ and want a wider 
passband, then I wouldn't want to limit it further by using the EQ.


I have tried various settings like Joe's below and I don't notice much 
if any effect.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 21 May 2016 20:48, Jim Brown wrote:

On Sat,5/21/2016 9:34 AM, Joe Subich, W4TV wrote:

The K3/K3S stores separate RX EQ settings for CW and SSB. The
appropriate setting is recalled based on the operating mode.  I have:
CW =  -16, -16,  0, 0, 0, -6, -16, -16and
SSB = -16, -16, -6, 0, 0, +3,  +5, -16


Those are certainly valid settings for one way of operating. I choose to
keep K3 RXEQ set flat for both modes. My reasoning for CW is I'm mainly
a contester, so I want to hear off-frequency signals calling me at the
reduced levels that result from the IF bandwidth I've set. On SSB,
because I'm already limiting the LF response by setting of the IF
bandwidth, and high frequency peaking tends to increase the audibility
of splatter.

But the important point is that there's no single setting that is
"right" for everyone, or for every style of operating.

I do things differently with the KX3, because the audio output stage is
current-starved, so it doesn't have much headroom. So for the KX3, I
roll off the three lowest bands on both modes (max cut), leaving the
others set flat (no boost, no cut). I would suggest the same settings
for the new KX2.

73, Jim K9YC

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Re: [Elecraft] KX3 Trans gain calibration issue

[Vic Rosenthal 4X6GP/K2VCO]

Mike,
I don't have a KX3, but the first thing I would do in this case is 
measure the voltage from the batteries when transmitting. Maybe the 
voltage is dropping severely enough to cause a problem.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 20 May 2016 21:15, Mike Weir wrote:

I took my KX3 out on the trail today and for the first time ever I
got ERR TXG and D=114? I looked things up on my Iphone and seemed it
needed a TX gain calibration. It never has done this in the past but
I figured maybe because I loaded on the new firmware that gives me
more Transmit power. I took the rig home hooked it up to a dummy
load, plugged it into my power supply and ran the TX gain calibration
from the KX3 utility. All went well and it passed, I then removed it
from the power supply and on battery power I put the rig into
transmit (holding the XMIT button in CW mode) and I received the same
message. On the home power supply no problem but on the internal
batteries I get the error message. VE3WDM Mike

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Re: [Elecraft] Elecraft Utilities

[Vic Rosenthal 4X6GP/K2VCO]

Reading this thread, I wonder how many actually do recognize this!

I was a field tester for the K3 and therefore also for the K3 utility.
I'm a retired software developer, and I had great respect for the 
developer of the K3 utility as I watched him great pains to develop a 
robust program with the ability to recover from almost anything that 
flaky serial and serial/usb connections could throw at it. Nobody wants 
to brick your K3/KX3, least of all Elecraft!


Remember, software is a cost center for them, not a profit center. And 
so is support. Do you think they want to take calls of the form "I built 
my firmware loader following the specifications to a T (except...) and 
now my K3 has become unresponsive?"


In my opinion Elecraft went over and above by providing versions for 
Windows, 32-bit Linux and Mac OS. Some manufacturers would give you 
Windows only, and it would be full of bugs, too!


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 8 Apr 2016 23:24, Jessie Oberreuter wrote:

Fortunately, we recognize that Elecraft is a /radio/ company, /not/ a
consumer software company, and we don't want to ask them to spend time
supporting dozens of firmware loaders.  Ideally, we would like to see
or, with access to the protocol documentation, develop an open-source
library for updating the firmware. Then we can build our own firmware
loaders for whatever platforms we choose.

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Re: [Elecraft] [K3] CW Speed & bandwidth (was Tokyo Hy-Power HL-1.2KFX amp interfacing (to ALC or not to ALC?))

[Vic Rosenthal 4X6GP/K2VCO]

But even if the RX bandwidth is wide enough that there is negligible 
distortion, you can't distinguish dits that are 5 ms long if the rise 
time is 2 ms.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 30 Mar 2016 07:17, Jim Brown wrote:

On Tue,3/29/2016 1:03 PM, Vic Rosenthal 4X6GP/K2VCO wrote:

The relationship of bandwidth and speed is that for given rise/fall
times, increasing speed will reach a point when the code elements blur
together.


Yes, but that's RX bandwidth, VERY different from occupied bandwidth.
The issue is RX bandwidth is the TIME (phase) response -- every change
in amplitude is accompanied by a change in the phase response, that that
phase distortion (remember, phase is time) blurs the code elements
together.


So you need more bandwidth for super high-speed CW because you need to
shorten the rise and fall times.


You need more RX bandwidth, for the reason described above.


But the occupied bandwidth doesn't change as you vary the speed.


Right. Occupied bandwidth is your "footprint" on the band -- how much
your signal is spread out.

73, Jim K9YC

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Re: [Elecraft] [K3] CW Speed & bandwidth (was Tokyo Hy-Power HL-1.2KFX amp interfacing (to ALC or not to ALC?))

[Vic Rosenthal 4X6GP/K2VCO]

The relationship of bandwidth and speed is that for given rise/fall 
times, increasing speed will reach a point when the code elements blur 
together.


So you need more bandwidth for super high-speed CW because you need to 
shorten the rise and fall times. But the occupied bandwidth doesn't 
change as you vary the speed.


The K3's keying waveshape and rise/fall times (the shape is important, 
not just the time) are good for far faster CW than I can send!


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 29 Mar 2016 22:36, Jim Brown wrote:

On Tue,3/29/2016 11:28 AM, Lynn W. Taylor, WB6UUT wrote:

On 3/29/2016 10:38 AM, Jim Brown wrote:

WRONG! CW speed has NOTHING to do with bandwidth, which is determined
by RISE and FALL times of the keying waveform and distortion in the
RF stages.

So, I can occupy zero bandwidth at 10,000 wpm CW and my occupied
bandwidth will be the same as 5 wpm as long as the keying waveform is
right?


No, because even the best rise/fall waveform has SOME harmonic content,
and CW speeds of 10,000 WPM have no practical meaning. But you CAN
occupy extremely narrow (a few Hz) bandwidth with a steady carrier,
because there's nothing to excite IMD. Bandwidth would be greater than
that only to the extent that the carrier is modulated by power supply
noise or phase noise. And, of course, any distortion in the RF chain
will produce harmonics.

73, Jim K9YC
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Re: [Elecraft] P3 CENTER button and SVGA display

[Vic Rosenthal 4X6GP/K2VCO]

There is a bug fix in the latest beta version of P3 firmware that might 
apply:


P3SVGA 01.33 / 3-7-2016

* Center Frequency in Tracking mode:  Fixed an old bug that caused the 
VFO A cursor to reset to center of screen when VFO A was tuned after the 
user had adjusted the center frequency offset using the CENTER function 
in tracking mode.



73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 20 Mar 2016 19:04, Mike Flowers wrote:

Looks like it's time for me to call Elecraft support on this one .



- 73 and good DX de Mike,   K6MKF, President -
 NCDXC



From: Mike Flowers [mailto:mike.flow...@gmail.com]
Sent: Friday, March 18, 2016 10:22 PM
To: elecraft@mailman.qth.net
Subject: P3 CENTER button and SVGA display



Hi Gang,



I have the P3 with SVGA option and a K3.



The firmware appears up to date, according to the P3 Utility.



I've set CenterEn: ON and use the CENTER button and the P3 knob to move DX
pileups more into the center of the display.



When I hold the CENTER button while in CENTER mode, the P3 display returns
the VFO A green bar to the Center position, and the red bar of VFO B to the
correct vertical position relative to VFO A.



However, the SVGA is hopelessly confused at this point, and the VFO A green
bar and the VFO B red bar are incorrectly positioned.



A power-cycle on the P3 is required to return the SVGA to normal.



I thought I might be getting RF into the SVGA port - but now have discovered
this happens without any TX at all.



Any suggestions or further things to check will be greatly appreciated!



Thanks.



- 73 and good DX de Mike,   K6MKF, President -
 NCDXC



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[Elecraft] K3 Diversity reception

[Vic Rosenthal 4X6GP/K2VCO]

Just an unsolicited tribute to the K3's diversity feature. I had been 
trying to work 8R1/K9XK in Guyana for a few days without success. 
Although I usually do OK with that part of the world, he's been too deep 
in the noise. I finally caught the propagation on 17 meters this 
afternoon and could actually tell that he was there. But switching on 
diversity turned the mere suspicion that I was hearing him into a 
solidly copyable signal, and I worked him!


Technical details: I am using diversity to good effect on all the bands 
that I have antennas for, 40-10m. My transmitting antenna is a rotatable 
dipole at about 35m (on a building) and the auxiliary antenna is a Pixel 
Loop


about 3m lower and 8m away from the center of the dipole. Although this 
is supposed to be too close for good diversity, the vertical 
polarization of the loop apparently provides the separation needed, even 
on 40m.

--
73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/
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Re: [Elecraft] Neoprene Ring for The Big Knob

[Vic Rosenthal 4X6GP/K2VCO]

For something like that you should be able to choose "US Postal Service 
First Class" which should be just a few dollars.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 7 Mar 2016 20:29, Dick Grolleman wrote:

Hi all,

I would like the new ring, but not for $ 50.64 shipping. This is getting
really ridiculous these shipping prices.

73 de Dick PA3FQA

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Re: [Elecraft] New P3 command and Macros...

[Vic Rosenthal 4X6GP/K2VCO]

I see. That will be very useful.

Now all I will need is a save/restore function for the center frequency 
and the span. I use fixed mode and have set up those parameters 
differently for each band. For example, on 18 MHz I have the center set 
to 18.084 and the span to 32 kHz. That gives me a fixed display of 
18.068 to 18.100.


If I had #RCF and save/restore, I could make one macro to save and drill 
down to the pileup, and another to restore to the normal setting.


The #RCF would allow me to restore the center, as long as I didn't 
change VFO A! But I often fiddle with it. And my span is different on 
different bands.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 27 Feb 2016 21:41, Alan wrote:

The #RCF+002500 command moves the P3 center frequency to 2.5 kHz above
the K3 VFO A frequency.

It works in both tracking and fixed-tune mode, except that if it places
the VFO cursor off-screen in fixed-tune mode, the P3 may automatically
change its center frequency again to keep it on screen, depending on the
setting of the FixMode menu setting.

Alan N1AL


On 02/27/2016 11:26 AM, Vic Rosenthal 4X6GP/K2VCO wrote:

It looks like you are setting the span to 6 kHz. Then what exactly does
#RCF +002500 do?

I'm thinking this only works in tracking mode, not fixed mode -- correct?

73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 27 Feb 2016 21:09, Dave Cole wrote:

A new command will be incorporated into the next P3 software release--
RCF.

This new command allows one to move the P3 CENTER frequency around on
the P3 screen, via relative moves, as opposed to the current absolute
moves now available  What can this do for you?

In the macro below:

SWT13;SWT13;FT1;UPB7;RT0;XT0;#SPN60;#RCF+002500;

The K3 is placed in SPLIT 5 KHZ up mode, and the P3 is placed into a
mode where the receive frequency is on the left edge of the P3 screen,
showing the pileup on the right in the above 5 KHz.

This allows you to see all stations you can hear who are transmitting
up 5 from your target station.  You can then place your transmit
frequency into the empty spots where no one is transmitting, that you
can see, above a DX station using VFO B.

I have updated the spreadsheet at: http://nk7z.net/adding-an-external-k
eypad-to-the-k3/ to include the above macro.  I have also updated the
CLEAR SPLIT macro in the spreadsheet to clear the split, and return the
P3 to center.  I have tested this with the Genovation Keypad, and it
works like a charm...

Many thanks to Elecraft for taking the time to listen to input from the
users, and for adding a command to allow this...  I honestly can say, I
know of no other company, which listens to the users and actually does
something as a result of listening to users other than Elecraft...  I
am amazed at the customer service from Elecraft...

THANK YOU AGAIN for this level of support Elecraft.

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Re: [Elecraft] New P3 command and Macros...

[Vic Rosenthal 4X6GP/K2VCO]

It looks like you are setting the span to 6 kHz. Then what exactly does 
#RCF +002500 do?


I'm thinking this only works in tracking mode, not fixed mode -- correct?

73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 27 Feb 2016 21:09, Dave Cole wrote:

A new command will be incorporated into the next P3 software release--
RCF.

This new command allows one to move the P3 CENTER frequency around on
the P3 screen, via relative moves, as opposed to the current absolute
moves now available  What can this do for you?

In the macro below:

SWT13;SWT13;FT1;UPB7;RT0;XT0;#SPN60;#RCF+002500;

The K3 is placed in SPLIT 5 KHZ up mode, and the P3 is placed into a
mode where the receive frequency is on the left edge of the P3 screen,
showing the pileup on the right in the above 5 KHz.

This allows you to see all stations you can hear who are transmitting
up 5 from your target station.  You can then place your transmit
frequency into the empty spots where no one is transmitting, that you
can see, above a DX station using VFO B.

I have updated the spreadsheet at: http://nk7z.net/adding-an-external-k
eypad-to-the-k3/ to include the above macro.  I have also updated the
CLEAR SPLIT macro in the spreadsheet to clear the split, and return the
P3 to center.  I have tested this with the Genovation Keypad, and it
works like a charm...

Many thanks to Elecraft for taking the time to listen to input from the
users, and for adding a command to allow this...  I honestly can say, I
know of no other company, which listens to the users and actually does
something as a result of listening to users other than Elecraft...  I
am amazed at the customer service from Elecraft...

THANK YOU AGAIN for this level of support Elecraft.


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Re: [Elecraft] KPA1500

[Vic Rosenthal 4X6GP/K2VCO]

Don't know what I was thinking -- not 8 or 9 years. But a long enough 
time that my comment is still correct.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 19 Feb 2016 12:06, Vic Rosenthal 4X6GP/K2VCO wrote:

Petr,

Don't sell anything right away. Elecraft has never given any indication
that they are interested in producing an amplifier bigger than the
KPA500. And the prototypes are 8 or 9 years old, if I remember
correctly, and they would have to change a lot in order to manufacture
them.

73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 19 Feb 2016 10:45, Petr, OK1RP/M0SIS wrote:

OK guys, the cards are dealt.
I am going to check what I can sell...:)
597...to go only
73 - Petr, OK1RP



-
http://ok1rp.blogspot.com

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Re: [Elecraft] KPA1500

[Vic Rosenthal 4X6GP/K2VCO]

Petr,

Don't sell anything right away. Elecraft has never given any indication 
that they are interested in producing an amplifier bigger than the 
KPA500. And the prototypes are 8 or 9 years old, if I remember 
correctly, and they would have to change a lot in order to manufacture them.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 19 Feb 2016 10:45, Petr, OK1RP/M0SIS wrote:

OK guys, the cards are dealt.
I am going to check what I can sell...:)
597...to go only
73 - Petr, OK1RP



-
http://ok1rp.blogspot.com

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Re: [Elecraft] K3s Odd sound vibrations - Hypothesis, Steps, Conclusion, and Request.

[Vic Rosenthal 4X6GP/K2VCO]

Why use adhesive (which I suspect Elecraft will tell you not to do)? You 
can probably solve the problem by shimming the core with a piece of soft 
plastic or foam, or putting a piece of tape under it.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 17 Feb 2016 05:54, Jerry Moore wrote:

I resent the original and added a step. I get the buzzing with the monitor
down low. Increasing the level allows me the ability to better isolate and
hear it.
If you remove the screws from the top cover and hold it in your hand there
is no buzzing or distortion at any monitor level, or volume level. The
harmonic distortion appears to be completely and easily resolvable but I
need an approved adhesive to use. I'm not messing up my nice radio without
support and approval from the manf.

Jerry Moore
CDXA, INDEXA, SKCC, Fists
AE4PB, K3S - S.N. 010324
http://www.qrz.com/db/AE4PB
An Amateur is - Considerate, Loyal, Progressive, Friendly, Balanced, and
Patriotic.

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Re: [Elecraft] New release of Win4K3Suite...set your clocks!;

[Vic Rosenthal 4X6GP/K2VCO]

Larry,

To answer one of your questions, the ONLY program that can update the
K3/K3S/KX3 firmware is the (free) Elecraft utility program.

73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 13 Feb 2016 16:46, Larry McCreary wrote:


Are there keyboard shortcuts on either of these programs.  Can you
update the elecraft firmware and software from either of these
programs? Thanks much.

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Re: [Elecraft] 12 meter K3 RFI from nearby FM station

[Vic Rosenthal 4X6GP/K2VCO]

I doubt that it is being picked up directly on the boards of the K3. I 
would try ferrite on the power leads as well as a line filter on the AC 
line to the power supply. Have you tried listening with battery power?


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 11 Feb 2016 20:55, Jon Zaimes wrote:

Yes, that is the case. Hearing it on both of my K3 transceivers with only
the 12v power cable connected, nothing else (listening on speaker).

Thanks to all for the tips. Still absorbing the advice before proceeding.

73/Jon AA1K
Felton, Delaware
www.aa1k.us

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Alan
Sent: Thursday, February 11, 2016 12:04 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] 12 meter K3 RFI from nearby FM station

On 02/10/2016 03:57 PM, Jim Brown wrote:

Yes, this hit me between the eyes as well. The K3 has Pin One Problems
at many (most?) connectors, so RF current flowing on shields of cables
plugged into those connectors will couple into the K3. I've been
preaching to Wayne about Pin One Problems since 2004, when we met in
Dayton.

If the problem is around 90 MHz, I'd use multiple one-turn and two
turn chokes with #43 material on every cable except the SO239 output,
which IS actually bonded to the chassis. Also choke the power cable.


But it sounds like he was still getting the problem with no cables connected
to the K3:

On 02/10/2016 06:58 AM, Jon Zaimes wrote:
...
  > Even when ALL cables are removed (only the power lead connected).
  > Grounding or ungrounding made no change. I tried the radios on a  >
battery but still had the RFI. Tried some ferrites on the power  > lead but
no change.

I suppose it could be a "pin 1" problem on the power leads.  It's kind of
hard to avoid that with an Anderson PowerPole connector.  Probably
additional low-pass filtering on the DC input would help.

Alan N1AL

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Re: [Elecraft] DIY Hard-drawn copper wire

[Vic Rosenthal 4X6GP/K2VCO]

I have actually done this -- but I didn't drive until it broke. I just 
gave it a little stretch. And it wasn't no. 8 wire!

Worked a treat, as our UK cousins say.

73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 11 Feb 2016 16:34, Dauer, Edward wrote:

In a recent post Jim, K9YC, suggested making hard-drawn copper wire
for antennas by attaching a few hundred feet of bare copper wire to a
tree or telephone pole at one end and to a bumper hitch at the other,
then driving away very slowly until it snaps.  That sounded like a
very attractive idea - much in the ham tradition.  I wondered,
though, whether it could be done using a car without a bumper hitch.
The minimum breaking strength of number 8 hard-drawn copper wire
(though it might be closer to number 10 after being stretched) is
between 644 and 826 pounds, according to a chart I found on the
Internet.  Rather than test it empirically with my 16-year-old SUV
(no bumper hitch), I wondered what 700 or 800 pounds of shear force
would do to an automobile frame, assuming attachment to a suitable
bolt somewhere.  Or would the tree fall over first?

Ted, KN1CBR

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Re: [Elecraft] 12 meter K3 RFI from nearby FM station

[Vic Rosenthal 4X6GP/K2VCO]

I didn't notice that you said you get it with no antenna. That does make 
it more complicated.


The fact that you get it on the main but not the sub points to the T/R 
switch, since the sub receiver does not go through the T/R switch if the 
sub is set to AUX to use either the non-transmit antenna or the BNC 
input. If you don't know, turn on the sub and hold BSET -- you will see 
either MAIN or AUX.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 10 Feb 2016 19:10, Jon Zaimes wrote:

Thanks for the tips.

Any filter likely would have to be inserted internally, since I am getting
this RFI without any antennas connected to the radios.Unless it is coming in
on the 12v power cord, which is still a possibility. I only tried a couple
ferrites and they may not have been the right one for choking out the FM
signal.

I did observe that I am only hearing it on the main receiver in my K3 that
has a sub RX, but not on the sub RX. Also, while checking for this, and then
going back to the main RX, the RFI signal on the main RX was greatly
reduced. Perhaps a relay contact issue. It is still just as strong as
previous on my other K3 (which has no sub RX). Toggling through PRE and ATT
did not eliminate it (though changed signal level as it would for any
signal).

73/Jon AA1K

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Vic
Rosenthal 4X6GP/K2VCO
Sent: Wednesday, February 10, 2016 10:20 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] 12 meter K3 RFI from nearby FM station

Jon,

I had a similar problem with a 50 kW AM BC station a few miles away. It
turned out to be strong enough to override the bias in the K3's T/R switch.
I built a high-pass filter which solved the problem.

You would need a low-pass filter in your case. Make sure it can handle 100w,
because you must connect it in the main antenna path -- the RX in/out path
is before the T/R switch.

73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 10 Feb 2016 16:58, Jon Zaimes wrote:

I had been noticing some RFI on 12 meters for some time that I
initially had thought was power line noise. My use of 12 meters is
seldom so it wasn't very high up on the list of things to track.

When I was reminded of it while listening for VP8STI recently, I did a
little more snooping and realized it was actually splatter from a BC
signal at the low edge or slightly below the 12 meter band, centered
about 24.89 mHz but audible from 24.87-24.91 mHz.

The distorted splatter is audible as a BC station, all talk, no music,
but not clear enough to decipher any ID.

A few days ago I decided to try to pinpoint the source, so listened to
the RFI on one ear while scanning the AM and SW bands with the sub RX
on the other ear. But I could find no matches, though did find the
splatter popped up centered on these additional frequencies:

813 kHz
996 kHz
2.820 mHz
3.626 mHz
19.4 mHz

Figuring it must be an FM BC station, I started going through a list
of Delaware FM stations and on the third one, 91.1 mHz, matched the
audio peaks to my splatter. Further research determined this was a
public radio station with a transmitter on a commercial tower just a half

mile west of my QTH!

While I of course was aware of the tower, which I knew to carry a
couple of cell sites and trunking radio, I hadn't been aware of the FM
station, which has apparently been there about 2 years. FCC data shows
it has 2.1 KW ERP. I had not had any previous issues with the site over

the past 17 years.


Thinking that mixing or rectification might be produced either at the
TX site or on my own QTH, I decided to track with my mobile rig, an
IC-706 MK2G. But there was NO evidence of the splatter on the 706.

Further debugging found that I was hearing the same splatter on BOTH
of my
K3 radios (no. 3021 and 3057). Even when ALL cables are removed (only
the power lead connected). Grounding or ungrounding made no change. I
tried the radios on a battery but still had the RFI. Tried some
ferrites on the power lead but no change.


So I'm thinking now there's some internal mixing in the K3 going on,
and wondering if any others have had similar issues and found any

solution.


73/Jon AA1K
Felton, Delaware
www.aa1k.us




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Re: [Elecraft] 12 meter K3 RFI from nearby FM station

[Vic Rosenthal 4X6GP/K2VCO]

Jon,

I had a similar problem with a 50 kW AM BC station a few miles away. It 
turned out to be strong enough to override the bias in the K3's T/R 
switch. I built a high-pass filter which solved the problem.


You would need a low-pass filter in your case. Make sure it can handle 
100w, because you must connect it in the main antenna path -- the RX 
in/out path is before the T/R switch.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 10 Feb 2016 16:58, Jon Zaimes wrote:

I had been noticing some RFI on 12 meters for some time that I initially had
thought was power line noise. My use of 12 meters is seldom so it wasn't
very high up on the list of things to track.

When I was reminded of it while listening for VP8STI recently, I did a
little more snooping and realized it was actually splatter from a BC signal
at the low edge or slightly below the 12 meter band, centered about 24.89
mHz but audible from 24.87-24.91 mHz.

The distorted splatter is audible as a BC station, all talk, no music, but
not clear enough to decipher any ID.

A few days ago I decided to try to pinpoint the source, so listened to the
RFI on one ear while scanning the AM and SW bands with the sub RX on the
other ear. But I could find no matches, though did find the splatter popped
up centered on these additional frequencies:

813 kHz
996 kHz
2.820 mHz
3.626 mHz
19.4 mHz

Figuring it must be an FM BC station, I started going through a list of
Delaware FM stations and on the third one, 91.1 mHz, matched the audio peaks
to my splatter. Further research determined this was a public radio station
with a transmitter on a commercial tower just a half mile west of my QTH!
While I of course was aware of the tower, which I knew to carry a couple of
cell sites and trunking radio, I hadn't been aware of the FM station, which
has apparently been there about 2 years. FCC data shows it has 2.1 KW ERP. I
had not had any previous issues with the site over the past 17 years.

Thinking that mixing or rectification might be produced either at the TX
site or on my own QTH, I decided to track with my mobile rig, an IC-706
MK2G. But there was NO evidence of the splatter on the 706.

Further debugging found that I was hearing the same splatter on BOTH of my
K3 radios (no. 3021 and 3057). Even when ALL cables are removed (only the
power lead connected). Grounding or ungrounding made no change. I tried the
radios on a battery but still had the RFI. Tried some ferrites on the power
lead but no change.


So I'm thinking now there's some internal mixing in the K3 going on, and
wondering if any others have had similar issues and found any solution.

73/Jon AA1K
Felton, Delaware
www.aa1k.us




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Re: [Elecraft] KPA3 vs KPA3A

[Vic Rosenthal 4X6GP/K2VCO]

You will have to get an official answer from Elecraft as to whether it's 
possible, but I can tell you that even if you can, it is probably not a 
good idea, because both of these modules were updated in the K3S.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 7 Feb 2016 14:08, Eric-Jan PA3CEV wrote:

Guys,



Is it possible to pull the KPA3 and KAT3 from my K3 and use them in a K3S?



73 Eric PA3CEV

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Re: [Elecraft] K3/K3S noise blanker performance greatly enhanced (at my QTH) -- need testers

[Vic Rosenthal 4X6GP/K2VCO]

I just discovered the same thing. I found the perfect noise to try it on 
on 15m, too.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 6 Feb 2016 12:34, Bill W4ZV wrote:

wayne burdick wrote

2.8 kHz should give some improvement over a narrow filter on some types of
noise. Worth a try. Just temporarily tell the firmware that it's a little
bit wider than your narrow filter, then use the WIDTH control to switch
between narrow and wide. Re-optimize the NB settings each time.


I've been having a problem with a pulse type electric fencer (not the 60 Hz
cycling buzz type which is impossible to cure with a blanker).  Most radios'
NBs deal effectively with pulses but for some reason (firmware change) my K3
(#4717) is not.  I decided to try Wayne's suggestion even though I only have
the 2.7 kHz stock filter.

The problem with Wayne's suggestion is that the K3 Utility will not accept
0.45 as a valid width for the 2.7 kHz filter because it is used for TX on
CW/SSB and bandwidths <2.7 kHz are not allowed.  Is there a workaround for
this or am I doing something wrong?

73,  Bill  W4ZV

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Re: [Elecraft] Balun suggestions

[Vic Rosenthal 4X6GP/K2VCO]

Jim,

You might find that on some bands your antenna tunes better with a 1:1 
balun and on others with a 4:1. Therefore, I recommend the Elecraft 
balun, which is switchable. It's rated at 250w so it should be adequate.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 4 Feb 2016 22:55, Jim Allen wrote:

K2/100 and KAT100 here.

I am changing around my modest antenna configuration now.  I have
been using the K2/100 with my AH-4, and now wish to use the KAT100
with balanced feedline antennas.

What balun, homebrew or commercial, if any, should I use?  I almost
always run 5 watts, all CW.

73 de W6OGC Jim Allen

Sent from my iPad

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Re: [Elecraft] Love me K3 line

[Vic Rosenthal 4X6GP/K2VCO]

Once you have a reasonably loud signal and an antenna that allows you to 
hear the DX, the most important attribute of a DX-oriented station is 
agility. You can tune the bands and when you hear something you need to 
be able to jump on it instantly. Get him before he's spotted and the 
pileup builds up. That's where the no-warmup, no-tuning KPA500 helps.


Once the pileup is going, you need to find the stations the DX is 
working and figure out the operator's pattern. That's where the 
subreceiver and the P3 are useful.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 1 Feb 2016 03:09, Paul VanOveren wrote:

I have worked both S Sandwich and S. Georgia Islands on 4 bands and CW and
SSB for ATNOs, # 343 and 344 for my DXCC credits. When I sold my Alpha 374
3 holer amp and purchased the KPA 500 I was somewhat concerned about the
pwr output difference. However I have worked probably 15 ATNOs since the
switch and have NOT missed working any station that I have wanted to work.
The P3 w/SVGA added is a great tool, particulary on CW, looking for a hole
to call in when the DX is listening 5 to 20 Kcs up...

NF8J
Paul
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Re: [Elecraft] KXAT100 "Hunting"

[Vic Rosenthal 4X6GP/K2VCO]

My guess is the same as yours -- common-mode current on the outside of 
the coax upsetting the tuner circuitry. If you have a large ferrite 
toroid (ferrite #31 should work on all bands), try winding several turns 
of the coax around it. It might work better near the rig or near the 
antenna.


Also, changing the length of the feedline might help. Odd multiples of 
1/4 wavelength are bad.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 30 Jan 2016 19:54, Dauer, Edward wrote:

My KX-line tuner (the KXAT100 installed in the KXPA100 amp) recently
started an odd behavior.  I wonder if anyone can help explain it.  When
tuning into an indoor Buddipole set at resonance, the ATU finds a
near-perfect solution when the power applied during tuning stays below
about 40 watts.  With the ATU set in “auto” however, if the power out is
higher than 40 watts the tuner hunts without stopping.  I have watched the
SWR readings change, often going briefly to 1.0 or 1.1:1, but the tuner
just keeps hunting, endlessly, even when the frequency is unchanged.  Yet
when it is first tuned at a lower power, either in Auto or Manual-tune,
and the ATU is set to Manual, it stays at the solution perfectly well no
matter how high the power goes.  I can live with this, just by tuning at
low power and then switching to Manual, but I wonder why the Auto function
works well up to a certain point but goes berserk at any power higher than
that?  Is the higher ERP sneaking back into the control circuitry somehow?

Ted, KN1CBR

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[Elecraft] OT antenna question -- solved, soon to be fixed

[Vic Rosenthal 4X6GP/K2VCO]

I would like to thank the numerous hams who responded to my plea for help.

The problem that was causing my SWR to rise with high power was not in 
my shack. The tuner, balun, coax and open wire line were all 100%. The 
trouble was at the connection of the feedline to the antenna.


The connection was made where stainless steel bolts passed through the 
tubing. The bolts heated up rapidly when running over 500w. At first I 
thought the connection was poor, but improving it did not help. From the 
way it was heating (away from the point of contact of the lugs to the 
antenna tubing) I think that it was due to the ferrous material 
(stainless steel) of the bolts heating due to eddy currents in the 
strong RF field.


I have experienced this phenomenon in amplifiers, but never an antenna!

I will change the method of connecting the line on Sunday and I hope it 
will solve the problem.

--
73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/
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Re: [Elecraft] Wide CW Signals

[Vic Rosenthal 4X6GP/K2VCO]

My guess is that they are that bad.
Luckily, the ones that are hot-switching their relays won't be on the 
air for too long. At least, not with high power.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 14 Jan 2016 18:56, Bob McGraw K4TAX wrote:

Depending on the radio they are using, some are really nasty!

And with some that seem to run their radio in QSK mode, but without a
QSK qualified amp, that makes things worse as they are likely arcing and
sparking the relays.  Nothing like a good old spark gap transmitter to
eat up lots of bandwidth.

73
Bob, K4TAX





On 1/14/2016 10:48 AM, Amateur Radio Operator N5GE wrote:

Is there something wrong with my P3, or are all of those extremely
wide raged CW signals I see in the DX pile-ups really that bad?
ARS N5GE

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[Elecraft] OT antenna question

[Vic Rosenthal 4X6GP/K2VCO]

I'm having a problem which has me stumped. I'm going to describe my 
complete antenna and feed system because something in it is misbehaving 
and I don't know what!


My system works on all bands from 40 to 10 (or it should).

The antenna is a full-size 20m rotary dipole. It is all aluminum tubing, 
no traps or stubs. Just a dipole. I am feeding it with about 30 feet of 
"true ladder line," which is open wire line made of #16 insulated wire 
spaced about 3-1/4" with black PVC spacers every 18" or so, except near 
the antenna and the rotor where I've added extra ones so that the 
spacing doesn't change when the antenna rotates.


The line comes into the shack and is connected to a static drain, which 
is a box with two 10-megohm high voltage resistors to ground and a 
couple of spark gaps. Then a piece of 450-ohm window line about 3 feet 
long connects it to a pair of large air variable capacitors in series 
with each leg which knock out some of the reactance on 40m to make it 
possible to tune more easily. Then a very short piece of window line 
connects to a big 5kW DX Engineering 4:1 balun, spec'ed for tuner 
service, and finally via a piece of RG-213 18" long, to a T-network tuner.


My K3 drives a TL922 amp and I have an SWR meter in line.

Now here is my problem: it works OK on all bands except 40 meters. On 
40, it tunes up fine with low power, but when I run more than a couple 
of hundred watts, after perhaps 10 seconds of key-down, the SWR starts 
to climb. I have watched it go to 4:1 before I stop sending for fear of 
destroying something.


The SWR rises both on the meter in the tuner and the extra one I have in 
line.


Classic symptoms of something heating up. But what?

- The tuner components are all cold.
- The coax to the balun and its connectors are cold.
- The balun itself is just barely perceptibly warmer (I have to touch 
the core to tell).
- The window line, the static drain resistors, the air capacitors and 
all the connections in the shack are cold.


I know the SWR is astronomical on 40 meters, so currents and voltages 
are high. But nothing in the shack seems to be heating up. Any more 
ideas of where to look?


--
73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/
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Re: [Elecraft] Mushy CW in QSK at 38 wpm and above...

[Vic Rosenthal 4X6GP/K2VCO]

A K3 with the old synth will sound bad at 38 wpm with any keying method 
unless QRQ is on.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 11 Jan 2016 21:07, Gerry Hull wrote:

Hi Vic,

This is K3, not K3s, no synth upgrade (yet!).   This is a KUSB cable for
CW keying, Stock.

You know, I've never really noticed a difference with QRQ on or off.

But, I do see a big difference when I go between 38 and 40 WPM.   I'll
try the QRQ mode again and see.  I'll also test with someone with QSK on
and off.

Thanks,

73, Gerry W1VE / VE1RM

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Re: [Elecraft] Mushy CW in QSK at 38 wpm and above...

[Vic Rosenthal 4X6GP/K2VCO]

Is it a K3 (not K3S) which did NOT have its synthesizer upgraded?
If so, then you MUST have QRQ mode turned on or you will see poor CW 
above about 35 wpm. In addition, note that QRQ mode is automatically 
disabled when you turn RIT/XIT on or use SPLIT.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 11 Jan 2016 18:14, Gerry Hull wrote:

I was operating VE4EA in NAQP this weekend...

A couple of people said the CW sounded mushy.

I was running QSK, with N1MM DTR CW Keying using the KUSB.

I noticed, on the sidetone, that it got mushy around 40 wpm.

I don't know Cary's firmware rev.  Is there a fix for this?

(This is with RIT off).

Interestingly, I also used the K3S at VY1AAA, at the same speeds.  No
issues.

Did anyone notice this on the sig?  Is there a later firmware that
addresses his issue?

73,

Gerry, W1VE / VE1RM

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Re: [Elecraft] suggested PC???

[Vic Rosenthal 4X6GP/K2VCO]

I put together a new Windows PC about 2 years ago. The single component 
that seems to have made the biggest difference is a 250 GB solid-state 
drive (SSD). The computer boots in about 20 seconds (OK, the I7 
processor helps too), which is important to me since I don't like to 
leave it on all the time. I also got a 1 TB conventional drive which I 
use for backups.
One good thing about assembling a computer from components is that you 
can install the OS without all the junk that the manufacturers like to 
gum it up with.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/


Vic

On 5 Jan 2016 19:53, Jerry wrote:

Now that I have had my k3s on the air for a couple of months I'm
ready to interface it to a computer. I am planning on a dedicated PC
just for use in the shack. My only uses (that I can think of now) are
logging and control of the k3s, perhaps remotely at some point.


It seems to me an I7 processor of any speed would be adequate with a
500gb SSD and wifi capability to my LAN (I guess I could hard wire
this). What else do I need in the box in the way of
interconnectivity? Any need for a large amount of memory (>8gb)?


Any suggestions would be appreciated


Jerry, k1tgx
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Re: [Elecraft] headphone impedance

[Vic Rosenthal 4X6GP/K2VCO]

I recently started using an old set of Kenwood HS-5 phones (8 ohm) after 
my cat chewed through the cord on my nice hi-fi phones. I noticed that 
the audio was much louder, I presume a result of the lower impedance. 
I'm even thinking about adding some resistance in series, because the 
audio gain is never past 9 o'clock, even with CONFIG AFG set to LOW.


The Kenwood phones also seem to have a much narrower frequency response 
than 'good' ones. Personally I like this.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/


On 28 Dec 2015 22:36, W2RU - Bud Hippisley wrote:

Perhaps this will help:

Look up the specs on a good home audio amplifier — say, QSC or Crown.
You’ll find something called “damping factor”, and it’s often 50 or
more.  Roughly speaking, it’s the ratio of the (loudspeaker) load
impedance to the internal (source) impedance of the audio amplifier.
So modern semi-pro and stereophile audio amplifiers are “grossly out
of specs”, as you put it.

I have a legacy, hernia-inducing McIntosh power amplifier,
circa-1960s, with output transformers and three taps — for 4-, 8-,
and 16-ohm loudspeaker loads.  Nothing I’ve owned since then uses
output transformers or matched loads.  Most audio amplifier designs
these days are voltage followers.  Most manufacturers don’t attempt
to match source impedance to load impedance.  Highly damped output
stages are “good” things to have.

Yes, it’s true that voltage-follower amplifiers deliver more power to
low-impedance loads than to high-impedance loads.  But if I were to
follow your line of reasoning to its logical conclusion in the home
audio arena, I would conclude that 4-ohm speaker systems are
sonically superior to 16-ohm speaker systems simply because they
require more output power from the audio amplifier to play my music
collection.

Does that seem like a reasonable way to choose your stereo system
loudspeakers?  Or headphones for your K3?

If your 100-ohm (or higher) headphones can’t provide reasonable
levels of undistorted sound pressure at your ears when your K3 or K3S
audio gain control is at, say, 9 or 10 o’clock, perhaps it’s time to
buy a new pair of “cans”.  That’s certainly gotta be cheaper than
reverting to a 75A-4 with its audio output transformer and 500-ohm
tap.

Bud, W2RU

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Re: [Elecraft] [K3] 6M power setting anomaly

[Vic Rosenthal 4X6GP/K2VCO]

Thanks to all who answered. I guess I never noticed this before.

73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 20 Dec 2015 18:25, Gene Gabry wrote:

Hi Vic,

I have the K3S with 5.33 firmware and see what you see. I believe this is
normal. Page 9 of the manual (Transmitter - output power) implies 6 meters
will be lower power max, although 106 watts is never actually stated. Based
on the statements of a lower max setting for 6 meters in this specification,
it would be a reasonable assumption the max power setting would be something
lower than 10-160m. Also, when setting CONFIG:PWR SET NOR, 6 meters will
operate independent of the other HF bands. Supporting some difference on 6
meters.
I actually thought I saw a thread some time ago from Wayne or Eric
confirming the difference in MAX power sets on 6 meters compared to the rest
of the HF bands, but have not been able to find.

73 Gene N9TF

K3S 10057

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Vic
Rosenthal 4X6GP/K2VCO
Sent: Sunday, December 20, 2015 7:51 AM
To: Elecraft Reflector
Subject: [Elecraft] [K3] 6M power setting anomaly

This is strange. Firmware 5.33. On 6 meters when the PWR control is turned
all the way up, the VFO B display only reads 106 watts. On all other bands
it is 110 watts.

I know that the actual maximum power output might vary per band, but
shouldn't the PWR control set the requested power to 110 watts on all bands?

Do others have the same result?
--
73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

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[Elecraft] [K3] 6M power setting anomaly

[Vic Rosenthal 4X6GP/K2VCO]

This is strange. Firmware 5.33. On 6 meters when the PWR control is 
turned all the way up, the VFO B display only reads 106 watts. On all 
other bands it is 110 watts.


I know that the actual maximum power output might vary per band, but 
shouldn't the PWR control set the requested power to 110 watts on all bands?


Do others have the same result?
--
73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/
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Re: [Elecraft] Advice on First HF Antenna

[Vic Rosenthal 4X6GP/K2VCO]

This is a very broad question! If I had no limitations, financial or 
regulatory, I would probably get a large Steppir beam on a tower at 
least 70' tall. But that is probably not what you are thinking of.


A simple, cheap antenna is a dipole up as high as possible -- no less 
than 30 feet in the air at the center, preferably higher. You could 
simply make a 'fan dipole' for 40 and 20 meters, fed with coax and a 1:1 
balun at the feedpoint.


An even better antenna is a 40 or 80 meter dipole fed with open wire 
line (see ). You can buy this assembled 
quite reasonably. It will work with the KX3 internal tuner plus a 1:1 or 
4:1 balun at the transceiver. If the feedline is at least 33 feet long, 
a 66-foot dipole will work on all bands from 80 through 10 meters 
(probably 6 meters too). Again, the higher the better.


You can buy all kinds of expensive verticals and clever compact 
antennas, but the above will outperform all of them for both DX and 
local work. Some of the expensive ones will be far worse. The only 
better antenna is a directional antenna like a rotary beam.


I'll let someone else answer your question about field antennas.

73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 8 Dec 2015 00:13, CRAIG SCHROEDER wrote:

I am pretty new ham and a brand new KX3/PX3 owner excited to try my
hand at DX'ing!  If you were buying your first HF base antenna,
primarily looking for performance on 20 and 40 meters, what would you
recommend?  Also, what do you suggest as a high performance field
antenna for QRP?

Thank you,

Craig KD0TXL

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Re: [Elecraft] N1MM CW issue

[Vic Rosenthal 4X6GP/K2VCO]

If you have a K3 with the old synthesizer, then you will have this 
problem with a paddle or with N1MM, or indeed with any source of CW. One 
solution is to activate QRQ mode (CONFIG CW QRQ = ON). There are some 
limitations, such as not being able to use it with SPLIT or RIT/XIT. The 
better solution is to buy the new synthesizer and replace it. In that 
case, if you have the second receiver, you need two synthesizers, which 
unfortunately will be expensive (especially in Europe).


The K3S comes with the new synthesizer.

I suggest you try sending with a paddle at the speed you want to use to 
determine if this is the cause.


There is also a problem with any computer-generated CW that it can be 
affected by other processes in the computer, especially if you are 
accessing the Internet for spots at the same time. The best solution for 
this is to get a Winkey device which will interface with N1MM+ and 
generate the CW.


Both of these issues could contribute to the problem.

73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 4 Dec 2015 10:14, Fausto Coletti wrote:

Hi all,

I noticed a problem with N1MM + in CW.
When I select a speed higher than 28-30wpm, the weighing between points and 
lines changes and,
at 40wpm the transmitted message becomes incomprehensible.
Any suggestions?

73, Fausto IK4NMF

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Re: [Elecraft] Hang-up on Relay Using QSK

[Vic Rosenthal 4X6GP/K2VCO]

Lee,

The Alpha 87A uses PIN diodes for t/r switching, so unless someone 
modified it, it's not the amp t/r relay, which is the usual culprit for 
this problem.


It could also be a poor connection somewhere in the antenna circuit. 
Sometimes a coax plug or socket is oxidized (or whatever) and it has 
high resistance for small voltages such as received signals; a shot of 
RF cleans it up.


I had a problem like this which drove me nuts for months. It turned out 
to be a corroded solder joint in a balun (at the antenna feedpoint, of 
course).


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 1 Dec 2015 19:06, KY7M wrote:

Towards the end of CQWW CW, I was having issues with the K3 not getting back
to receive when I stopped transmitting.  This was an intermittent problem -
if I keyed the radio again with a dit or two, I could get back to full
receive.  I could still hear signals, but greatly attenuated when the relay
would hang up.  I was using QSK with the K3 and my Alpha 87A.  I am not
seeing any fault indication on the 87A and I am trying to figure out if the
problem is in the K3.  I also have a KPA500 but have not used it in a
contest lately to know if the problem would repeat with another amplifier or
barefoot.  It seems to happen only after heavy use.  I think I experienced
it a week earlier in the WAE RTTY contest as well, but did not do as much
operating as in CQWW.



73,



Lee, KY7M

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Re: [Elecraft] Crackling in Headphones

[Vic Rosenthal 4X6GP/K2VCO]

See if you hear it with no antenna connected (or switch to ANT 2 if 
nothing is plugged into it).


That will tell you if it is some kind of noise that you are picking up 
or if it is being produced in the radio.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 30 Nov 2015 14:02, j...@kk9a.com wrote:

There are times that I have noticed a crackling sound in my headphones
with my K3S. This is not the normal band noise static that has depth, this
crackle sound seems very close to my ears.  I first noticed it with my
Heil headset and I tried wiggling the connection, changing the RX EQ
settings and turning on noise reduction but nothing had any effect. It
randomly comes and goes and I think I have also heard it on TX. I thought
perhaps it was related to the Heil brand headphones. Last night I plugged
in a new Sony professional headphone and the crackling sound was very
strong for a few minutes and then eventually went away. I have never
experience this with any other radio and I have no idea what is causing it
or how to make it go away.

John KK9A

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Re: [Elecraft] [K3s] REV setting keeps being reset automaticaly

[Vic Rosenthal 4X6GP/K2VCO]

Try changing bands with no software running that communicates with your 
rig. That will tell you if a program is doing it or there is something 
funny about your rig.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 17 Nov 2015 18:43, Amateur Radio Operator N5GE wrote:

Every time I change bands the REV setting reapears when I go back to
that band.  This happens on all bands.

I know how to turn it off by holding the ALT button when this happens,
but it's iritating to have to keep doing it.

How can I make it stop coming on to begin with?

ARS N5GE

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Re: [Elecraft] K3 Attenuator Turning Itself On

[Vic Rosenthal 4X6GP/K2VCO]

I have a 50 kW BC station a few miles away. I had to make a HP filter 
because of the IMD. But it was not strong enough to force the attenuator on!


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 15 Nov 2015 22:22, Don Wilhelm wrote:

Sounds like you may have a strong AM broadcast signal that is
overwhelming the K3 input.
MW signals will be attenuated by the Low Pass Filter, but those signals
below 160m will not be.
The K3 does have some suppression of AM Broadcast band frequencies, but
it may not be sufficient in your case.

73,
Don W3FPR

On 11/15/2015 3:13 PM, Dennis wrote:

Joe

Yes, I can turn the attenuator off once I'm on 160M, but within 2
seconds of turning it off
it will turn itself back on.

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Re: [Elecraft] High SWR no power out

[Vic Rosenthal 4X6GP/K2VCO]

Make sure the cable to the dummy load is good.

I presume you connected the cable to ANT 2 when you selected it? If not, 
try it.


If it is OK on one antenna, take off the cover and check that the 
antenna connector that doesn't work is plugged into the KAT3 as it 
should be.


Does this happen on all bands? That will tell you if there is a problem 
in the lowpass filters or the KAT3.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 5 Nov 2015 17:23, WR5DC wrote:

 I have a K3 that quit transmitting on SSB last night so I connected an
SWR/Wattmeter/Dummy Load directly to Antenna 1.  I held down the xmit button
and the display reads 16 watts. 99-1  high swr.   I have the optional
antenna tuner but it is in the bypass mode.   I also tried selecting ANT2
with the same results..   Anyone have any ideas before I send it back to the
factory for repair?



Dennis WR5DC


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Re: [Elecraft] P3 - Waterfall Marker?

[Vic Rosenthal 4X6GP/K2VCO]

I can usually get close enough to hear the station by eye without a 
marker, either on the P3 or on a 24" VGA.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 4 Nov 2015 20:14, Steve Ellington wrote:

All that's needed is a dot, pointer...something to act as a guide so we can
line up the waterfall with the spectrum's marker. It doesn't need to be a
translucent line.
The dot could be at the bottom of the waterfall since that's where the
desired signal is headed anyway.
Great minds at Elecraft can do this!
Steve N4LQ

On Wed, Nov 4, 2015 at 12:45 PM, Paul Saffren  wrote:


Hi Steve,

It's pretty hard to do what you want with the P3 hardware.  The P3's
hardware is nowhere close to what you can get with a standalone PC, but it
does alright for a standalone panadapter and offers some features not found
on traditional SDR systems.   There's really no way to draw a translucent
line down the waterfall display and still have the P3 run at a reasonable
speed.

Kind regards,

paul

Paul Saffren - N6HZ
Project Manager
Elecraft Inc. 831-763-4211 x122www.elecraft.com

On 11/4/2015 9:32 AM, Steve Ellington wrote:

Paul et al
"Freeze" locks up everything including the marker so how does that help?

When searching for signals we might see one on the waterfall that is half
way down the screen. We want to mark, click or do something to get us
exactly on frequency so we can either wait for the signal to return or try
calling QRZ however there doesn't seem to be a way to get on frequency
other than a rough guess.

At first when you mentioned "freeze" I was excited but now I find that
using freeze makes the situation even worse since nothing responds. I'm
just looking at a locked up system!

The marker needs to be independent of the displayed materialLike a
mouse on virtually any other SDR software.
Is that something Elecraft can do or is it impossible with this hardware
configuration?

Thanks
Steve N4LQ

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Re: [Elecraft] K3 has no output Help!

[Vic Rosenthal 4X6GP/K2VCO]

Check TX INH in the CONFIG menu. It should be OFF unless you are using 
that feature.


No, it's not TEST mode, because the TX light is on.

73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 31 Oct 2015 20:46, aver...@mchsi.com wrote:








My K3 has stopped putting out a CW signal!
Red transmit light comes on.No reading on SWR meter.Rcv. is working fine.VOX is 
turned on.Antennas are OK.
HELP!  Any suggestions?
Randy KK4BNC

Sent from my Verizon 4G LTE Smartphone

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Re: [Elecraft] K3S In-Depth Review Coming Soon?

[Vic Rosenthal 4X6GP/K2VCO]

Operators disagree about K3/K3S audio. To me it sounds great, others 
dislike it. The best way to settle the question for your own, personal 
ears, is to find someone nearby who will let you use his/her K3S for a 
few hours.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 27 Oct 2015 19:53, Paul Clay via Elecraft wrote:

I was wondering if and when a full-on review of the K3S would be
forthcoming.  I'm a bit surprised that following its release there
hasn't been a lot of reviews posted (certainly no comparison to the
number of reviews that followed the release of the original K3).  A
comprehensive review of the K3S, particularly with reference to the
original K3, would help me to decide whether the main issue that held
me back from pulling the trigger and ordering a K3 some time ago
(specifically, the quality of the original K3's receive audio, and
the anecdotal observations that the K3's receive audio was "tiring"
to listen to) has been resolved in the K3S.

BTW, if such a review has already been posted or published somewhere
and I just missed it, I'd would really appreciate a referral to it.
(The holidays are approaching and my "wish list" is not yet complete.
)

Thanks!

- Paul N6LQ (happy builder, owner, and operator of an Elecraft
K2/100)

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Re: [Elecraft] K3S speaker vibration/whine

[Vic Rosenthal 4X6GP/K2VCO]

If you do this, be sure to leave some bare metal around the screws so 
there can be good electrical contact for shielding purposes.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/


On 22 Oct 2015 18:56, ae...@carolinaheli.com wrote:

Outstanding!! I’ll try that. I don’t listen to my rig often over the
speaker as I have some different hearing losses in each ear.



Jerry,

I have this buzzing in my K3, and have heard it in some (not all) of
the K3s I have built for friends. I have found that most of it comes
from vibration between the case top and the vertical metal pieces
that contact the top. If that's what you're hearing, you can minimize
it by putting some vinyl tape over the tops of the metal pieces.  In
each case I've seen,  the buzzing is worst around 400 Hz, near my
favored CW sidetone frequency!

73,

Randy, KS4L



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Re: [Elecraft] K3 Received Signal Drops When Roofing Filter Switched In

[Vic Rosenthal 4X6GP/K2VCO]

I used the dBV function to match the filter gains so that there would be 
no difference when switching filters. In my case I found it necessary to 
set the 400 Hz filter gain to +5 dB. You can do it by ear, but either 
way you need a steady signal. I used my little Elecraft XG1 to generate 
a steady 1 uv signal.


Note that if you have the subreceiver, filter gains may need to be 
different. The easiest way to set them is with the K3 utility.


Regarding the RX EQ, I don't use it at all on CW, because at narrow 
bandwidths the pitches that you hear are determined by the width and 
shift. If you like to listen to CW with 2 kHz bandwidth, then it might 
be useful, but I don't.


You absolutely should NOT set the RX EQ to boost any frequencies on CW. 
Just cut the ones you don't want. This is because the RX EQ is turned 
off at bandwidths < 150 Hz. As a result, if you are boosting 400 Hz by 2 
dB, then when you go to a narrow bandwidth the boost disappears -- 
exactly what you don't want!


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 22 Oct 2015 03:13, engineercm wrote:

Thanks to all that pointed me to the filter gain settings accessible with the
Utility.  It was set at 2 db which is the recommended value in the K3
manual.  Now that I know where the parameter is, I'll experiment more with
weak signals.  The manual does not suggest going above 2 db claiming DSP
operation would be impaired in some way.

I've also concluded that the sharp drop in noise when the filter kicks in is
to be expected.  I found the same instantaneous drop in noise with the 200
Hz filter is engaged.  Not at all annoying; I was just trying to understand
this marvelous radio.

I'm primarily a CW op and will leave the Rx Eq set at +2db around the
sidetone frequencies and all others -10 or better.  That seems to suit my
ears and my current operating skill.

73 de Clark WU4B



--
View this message in context: 
http://elecraft.365791.n2.nabble.com/K3-Received-Signal-Drops-When-Roofing-Filter-Switched-In-tp7609366p7609423.html
Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] When is mode A not mode A?

[Vic Rosenthal 4X6GP/K2VCO]

Keyers are very different. For example, I am a mode B guy and a 
'squeezer', but I find mode B on the Logikey, the K3 and the WinKeyer 
have different timing demands. I have beaten myself into being able to 
use the K3 keyer despite formerly using the Logikey, but I had to make a 
conscious effort to do so.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/


Vic

On 22 Oct 2015 01:04, Roger Crofts wrote:

I love my KX3 and its little paddle. Unfortunately my keying is full
of mistakes. When I send the letter C for example, it often comes out
as CT or K. I thought the KX3 must be set to mode B keying, but no,
it was on mode A. I originally learnt to send on an ETM-3b squeeze
keyer many moons ago. The ETM-3b is a mode A keyer. I tried plugging
a Bencher paddle into the KX3 but the problem remained, so the paddle
is not the problem. Is the mode A, that I am used to, somehow
different to the mode A in the KX3?

Roger, VK4YB

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Re: [Elecraft] K3 No Receive, No Transmit - SOLVED

[Vic Rosenthal 4X6GP/K2VCO]

The TMP connectors are not that hard to insert, but the danger is that 
it is easy to apply too much force when they are not aligned properly, 
and damage the socket-board connection. You can lift the trace from the 
board if you are not careful (yes, I learned this the hard way).


The trick is to start them by hand and make absolutely sure the center 
pin is in its socket, and then push them all the way in with a tool like 
very small needle-nose pliers or forceps.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 20 Oct 2015 19:07, Bob wrote:

The cost differential probably makes that impractical.

However does anyone know if there is a tool for insertion and removal of
those TMP connectors?   I'd surely invest in one if I ever saw it.  They
definitely are a PITA.

73,
Bob
K2TK  ex KN2TKR (1956) & K2TKR .

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Re: [Elecraft] K3 Popping noise in headphones??

[Vic Rosenthal 4X6GP/K2VCO]

Well, I have an old K3 plus new synths, I have the RX EQ set to zero dB 
all across its range, and I hear the noises. I would call them short 
tone bursts rather than pops, though.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 18 Oct 2015 21:16, Joe Subich, W4TV wrote:


On 10/18/2015 11:46 AM, Wes (N7WS) wrote:

As a point of reference, my old K3 with the original synthesizer
board pops when changing BW. It's most noticeable going from 150 Hz
to 100 Hz and vice versa.


There will be a slight pop when changing bandwidth between 150 and 100
Hz as the K3/K3S disables the RXEQ at bandwidths less than 150 Hz.  The
level of the "pop" will be related to the amount of EQ in use *around*
*the center of the passband* (e.g., "pitch").  If for example, pitch is
500 Hz and bands 4 (400 Hz) and 5 (800 Hz) are 0, there will be little
or no "pop".  However, if one has 400/800 Hz set for significant boost
there will be a fairly loud "pop" as the level changes.

73,

... Joe, W4TV


On 10/18/2015 11:46 AM, Wes (N7WS) wrote:

As a point of reference, my old K3 with the original synthesizer board
pops when changing BW. It's most noticeable going from 150 Hz to 100 Hz
and vice versa.
This is with normal AF gain and CM500 in rear headphone jack.

On 10/16/2015 6:01 PM, jim wrote:

I just got my K3 back from Elecraft.  They did the once over and
installed
the new SYN boards.


I have noticed a "popping" noise in the headphones as I change the
bandwidth
control, but ONLY as I transition from 200 Hz, 150 Hz, 100 Hz and 50
Hz.  I
have only checked this in the CW mode.


This popping noise was not there before sending the rig in.


I have the 500 Hz and 200 Hz crystal roofing filters installed, which
is the
same configuration as I had before sending it to Elecraft.


Any thoughts?


Tnx


Jim

W6AIM

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Re: [Elecraft] Unplugging the radio to protect it

[Vic Rosenthal 4X6GP/K2VCO]

Very few hams, if any, disconnect EVERY cable from their rig when it is 
not in use. Having said that, it's certainly a good idea to have a 
common grounded entry point with suppression devices for power, antenna, 
phone, cable, etc. so there won't be potential differences between 
equipment in the event of nearby lightning.


But in my opinion, making total disconnection of the equipment a 
condition for warranty repairs is a statement that they don't take the 
warranty seriously.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 8 Oct 2015 16:46, Peter Pauly wrote:

I had an experience a couple weeks ago where the USB audio chip in my
Kenwood stopped working. Kenwood service refused to fix the problem under
warranty and blamed me for not unplugging every single cable to the radio
when not in use. I had only disconnected the antenna. Not the power, USB,
key, etc. No other equipment was affected and the USB CAT still worked, so
only one chip stopped working. The Kenwood service center even said they
have had tons of people with the same problem. That experience prompted me
to order a K3S and it's currently in a UPS truck somewhere between CA and
IN.

My questions for you guys and gals are:
Do you disconnect every cable when the radio is not in use?  What are
Elecraft's expectations or recommendations to us?  What chip does the K3S
use for USB audio?  How would Elecraft, the company, have handled this
situation?

Peter
W0VLL

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Re: [Elecraft] PC<>P3

[Vic Rosenthal 4X6GP/K2VCO]

Salvo,

I don't have an Ultrabeam, but I have an older Palstar AT-AUTO antenna 
tuner hooked up like this. I have simply paralleled the RS232 RXD input 
to the tuner with the TXD line from the P3 that goes to the computer. I 
did not connect the TXD line of the tuner.


The tuner is in a listen-only configuration. In order for this to work, 
my logging program must be running. It polls the K3 and the tuner sees 
the data from the K3.


I believe some are doing the same thing with SteppIR antennas.

73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 6 Oct 2015 12:18, Salvatore Irato wrote:

Hi all.
On behalf of a good friend I would ask if there is anyone out there is
using or having experience using a configuration like this:
PC<>P3<>K3>UB cntrl.
Starting from a PC, connecting a P3 and then a K3, all via RS232, then
via the same RS232 having chained a Ultrabeam (UB) dynamic antenna
controller.
I mean a UB as a paralleled target, over TX data for the K3 VFO data,
coming from the K3 both as a result of any manual or logger charnges
of the K3 QRG.

I don't have all this, as I lack the dynamic antenna, but I am pretty
sure that somebody had already solved successfully all that. Thus
having the Ultrabeam controller getting data from the K3. As to follow
with motion, UB, K3 and logger changes to a new band or in band
segment changes. Isn't?

I ask all this in the more general terms, i.e. cables schema,
preferred speeds, reference url's or and so on. Any information could
be valuable from whoever had made this working.

  TU in advance, BTW feel free to drop me a mail out of list, not to
use too much space here.


   73 de iw1ayd Salvo

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Re: [Elecraft] K3S proper grounding?

[Vic Rosenthal 4X6GP/K2VCO]

The problem has nothing to do with grounding.

RF is getting into the house wiring. I suggest adding a choke balun at 
the feedpoint of the antenna to reduce "RF in the shack" and wrapping 
the power cord of the TV around a ferrite rod, toroid or bead for 
several turns. Google K9YC's RFI tutorial for details.


OCF dipoles are very bad for RF in the shack due to the degree of unbalance.

Radio Shack used to sell little square ferrite toroids that split apart 
so you can wrap wires around them without interference from plugs, etc.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 26 Sep 2015 20:41, ae...@carolinaheli.com wrote:

On 40m my TV turns off and on by itself when I transmit. I'm thinking that
it's related to grounding because I've not figured that out yet. I have a
roof mounted mast that holds my dipole. The coax comes down through the
roof, routes through the attic down inside the wall to the station. I've
been told I need to ground the feedline BEFORE it enters the house but I'm
not sure how to get a ground correctly up to the roof. No matter how I run
the ground a lightning strike would likely ignite my house inside the attic
if I run it inside the house. I have a low pass filter installed just
before/after the Rig.



The plan I'm thinking of so far.

1.   Run an 8 gauge dedicated power feeder from my main panel (on the
opposite side of the house) to the shack with a 20A breaker. The 8Ga is to
lower ground losses.

2.   Install a ground rod outside my shack and run a heavy gauge to the
shack to bond with the dedicated power line ground.

3.   Ground all gear in the shack to the dedicated power ground.

4.   ?? maybe do a run of 14-2 romex with all three leads bonded together up
to the mast, install a mast antenna switch and ground it with the 14-2.

Thoughts /comments?



Running only 100w into a Buckmaster 7 Band OCF dipole at 35' per the
instructions. The dipole is broadside to 45 degrees for EU coverage.



Thanks in advance. I've read A LOT on grounding but haven't seen this
scenario covered.





On another note I appear to have an allergy to my key. I just can't bring
myself to get on the air with it. I need the practice to get my speed.





Jerry Moore

AE4PB, K3S - S.N. 010324

An Amatuer is - Considerate, Loyal, Progressive, Friendly, Balanced, and
Patriotic.

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Re: [Elecraft] Elecraft SP3 External Speaker - New Thread

[Vic Rosenthal 4X6GP/K2VCO]

Will stainless screws be an option or standard? Will there be a special 
firmware utility program for it, and if so will there be an IBM 7094 
version? Will I be able to copy 75 wpm on it (I already know the answer 
to that one).


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 22 Sep 2015 19:19, Henry Pollock - K4TMC wrote:

I have just spent quite a bit of time reading all the mail relative to the
new SP3...but did not see these questions:

Will the SP3 have a serial number?  If so, can how can I get the number to
match my K3?

For those with the newer K3S model, can they get one with a SP3S logo?

Will there now be a SP2 to match the K2 model?  And, a SPX3?

73,
Henry - K4TMC

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[Elecraft] Palstar AT-AUTO with K3

[Vic Rosenthal 4X6GP/K2VCO]

I have an opportunity to get a Palstar automatic tuner, the AT-AUTO. 
This is an older version, NOT the new HF-AUTO.


It has an RS232 interface which the manual says can be used in a 
listen-only configuration with transceivers that send frequency data 
from a CAT port. It does support the Kenwood protocol.


My question is: has anyone used this tuner with a K3, and if so have 
they been successful in having it get frequency information via the 
RS232 connection in this way?


--
73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/
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Re: [Elecraft] K2 Options

[Vic Rosenthal 4X6GP/K2VCO]

I had both but ended up keeping the audio filter. I think it's a matter 
of personal taste, so if you have the opportunity to try a K2 with those 
options, it's worthwhile.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 7 Sep 2015 06:45, Dauer, Edward wrote:


Still exploring options for a backup rig for the K3.   (The KX3 stays
at the other QTH.)   Began looking into the K2.  The build sounds
interesting.  One choice that has to be made is between the KDSP2 DSP
filter and the KAF2 audio filter and clock.  Apparently it has to be
one or the other - not both.  Any advice about that choice?  Anyone
who chose one now wish they had done the other?  In case it matters I
plan to operate CW only, and would probably go for the internal
KPA100 and the external KAT100.  Thanks for whatever counsel might be
offered . . .

Ted, KN1CBR

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Re: [Elecraft] K3S - Ordered Today!!

[Vic Rosenthal 4X6GP/K2VCO]

I have K3 serial 7. Shaken, not stirred.

73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 6 Sep 2015 16:20, Phil Anderson wrote:

Are you looking for 007 or what? Perhaps 7373?

What would a cool number be?


Jerry Moore 
Saturday, September 05, 2015 8:03 PM
YAY!
I ordered my K3S today. I'm really hoping I get a cool serial number

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Re: [Elecraft] K3S SubRx Question

[Vic Rosenthal 4X6GP/K2VCO]

Both receivers are muted on transmit regardless of the antenna 
connections. The carrier operated relay will protect the receiver (or 
not), but it doesn't have any effect on what you hear.


Don't know about the schematic.

73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 27 Aug 2015 14:07, ae...@carolinaheli.com wrote:

On a K3S with a SubRx installed and connected to AUX RF do you continue to
hear reception on the SubRx during transmit? The operations manual seems to
imply that you will unless the antennas are not sufficiently isolated in
which case a carrier sensing switch may engage in an attempt to protect the
RX (and there is something about the potential to damage the unit).

Also is the K3 schematic correct for the K3S?

Thanks in advance.
Jerry Moore
AE4PB

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Re: [Elecraft] K3 Stuck in MCU LD

[Vic Rosenthal 4X6GP/K2VCO]

There's a procedure described in the K3 Utility Help menu under 
'troubleshooting' called Forcing the K3 into "Firmware Load Required" 
Mode. Follow this procedure.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/


On 21 Aug 2015 10:37, pastor...@verizon.net wrote:

I am sending this message again, as it seems my first message never
made it to the board. I was trying to load the new Firmware into my
K3. Well for some reason we had a power blip during a storm and now
my K3 is stuck in MCU LD. Right now the screen in dark when power is
applied and MCU LD is on the screen. The Red TX light is flashing and
after a period of time it will then go to the Delta F light which
will flash yellow. I cannot connect to my K3 via my computer because
I'm sure it's because it is stuck in the MCU LD error. How does one
reset their K3. I read about the EE Init where I Held in the Shift/Lo
button while pressing the Power button and nothing  Plus to get the
K3 out of this state I need to shut off the power supply. Every
button is totally useless. Perhaps I need to call the people at
Elecraft once I get home from work this afternoon. Hopefully someone
on the board will have a solution or someone from elecraft will see
this message and help! Thanks! Mark Griff in, KB3Z

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Re: [Elecraft] FS: K3/100, P3, KPA500, more...

[Vic Rosenthal 4X6GP/K2VCO]

I'm not being critical of Arlen (or anyone), but why do so many people 
selling equipment not want to ship it overseas? If the buyer pays the 
actual shipping cost, then the only difference is the single customs 
declaration the seller has to fill out, which takes about 2 minutes. 
Payment can be made by Paypal, and shipment can be by USPS, or to most 
countries by UPS or Fedex.


As someone who sent huge quantities of stuff from the USA to my kids 
here, I just don't get it.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 20 Aug 2015 18:33, Arlen Fletcher wrote:

I’m selling my K3/100 (S/N 81xx), P3 (S/N 31xx)  and KPA500 (S/N 6xx)
as well as some other misc equipment.  Continental U.S. buyers only
please!

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Re: [Elecraft] Features wanted

[Vic Rosenthal 4X6GP/K2VCO]

You can adjust the frequency of the APF peak with the SHIFT encoder. You 
can also tap the FINE button to get a slower tuning rate when you are 
using the APF. This makes it a bit easier.


In some conditions the APF makes the difference between being able to 
copy a station and not. Its usefulness depends on the nature of the 
background noise. Don't give up on it.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 6 Aug 2015 21:50, Greg wrote:

Also I would like to see the APF improved by allowing the peaking filter to
be "tuned" as it was on the FT1000D.  I almost always used the APF on the
Yaesu but end up turning it off when I try it on the K3.  I think the "peak"
is too narrow.
73, Greg-N4CC




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Re: [Elecraft] Diversity Reception

[Vic Rosenthal 4X6GP/K2VCO]

I use diversity (vertically and horizontally polarized antennas) on CW a 
lot, and there's more to it than just selecting the louder signal. I 
can't put my finger on the precise mechanism, but it seems that CW 
characters are less prone to being damaged by bursts of QRN in diversity 
mode.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 4 Aug 2015 07:32, Jim Brown wrote:

On Mon,8/3/2015 8:41 PM, Edward R Cole wrote:

However it is not always bad for the two diversity channels to be
combined for best signal.  The example is digital signals which the
human brain cannot process.  The example was given of using two
antennas of differing polarity for HF.


Combining, yes -- into different inputs of the analysis system. Again,
when signals combine IN THE SAME SIGNAL CHANNEL (emphasis added)
differences in the time/phase response of the two signal paths can cause
destructive interference which degrades decoding.

OTOH, in a sophisticated decoding system, there's certainly nothing
wrong with bring both signals in on separate inputs, then combining
them, or choosing the best signal, or even processing the signals to
enhance readability. But ONLY combining them on a single electrical
channel is a bad idea.

One of my neighbors (near Santa Cruz) has a VERY interesting UHF
repeater system. It's multi-site(five sites going on six),voted (meaning
that the RX with the best signal is transmitted), and simulcast (all
sites transmit at the same time). To make this work, Bboth audio and RF
are synchronized to the Hz using a GPS reference and some really
innovative use of low cost audio and networking gear. If you're
interested, look at wb6ece.org, especially the Technical Info page,
where there's video and audio of a talk that KA6SQG did at Pacificon
about his system (WB6ECE is his dad's call). The audio is not well
recorded, so you'll need headphones for good copy.

73, Jim K9YC
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Re: [Elecraft] Linked VFO's -- usage?

[Vic Rosenthal 4X6GP/K2VCO]

What I do is switch antenna connections. My secondary antenna is 
connected to both the RX ANT and the sub's BNC input. So I can listen to 
the main + secondary antennas in diversity mode, just the main antenna 
with diversity off, or just the secondary antenna (regardless of whether 
diversity is on or off) with the RX ANT switch on.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 2 Aug 2015 17:34, Arie Kleingeld PA3A wrote:

Hi all,

I might be one of few people who use the Linked VFO's in diversity, not
that I want to, but because I have to.

When listening to diversity I am stuck with the L-MIX-R setting to A-b.
Some times I want to switch from A-b to  A-A   or   b-b  and back again.
It is used when I need to listen to only one antenna because of very
weak signal or QRM via the other antenna to my other ear.
This switching cannot be done when the K3 is in diversity mode, which is
a pity. That's why I Link the VFO's. (All done with computer macro
commands of course).

It's probably not on the list for this to come in the firmware. It's
seems to be only Arie (me) that would appreciate the audio switching in
diversity :-)
The K3 is a very flexible radio, but not at this. If I only could switch
the audio when the radio is in diversity via a macro, that would be
enough. (Does not need to be from a front side button)

73
Arie PA3A

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[Elecraft] FTP download problem solved

[Vic Rosenthal 4X6GP/K2VCO]

Thanks to those who responded to my plea that I was unable to access the 
Elecraft ftp site.


I tried different browsers, the Elecraft K3 Utility, and a standalone 
ftp program with no luck. I disabled my antivirus and turned of the 
Windows firewall. Still didn't work.


Finally I tried to connect via a VPN. Immediate success!

So it looks like my ISP thinks I'm too irresponsible to be trusted with 
ftp. Grrr.

--
73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/
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Re: [Elecraft] P3TX Mon

[Vic Rosenthal 4X6GP/K2VCO]

I'm unable to access 

The browser says 'connecting...' and sits there. I've tried both Firefox 
and Chrome. I've done this before. Is it just me or is there a problem?


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 29 Jul 2015 20:39, Eric Swartz - WA6HHQ, Elecraft wrote:

Yes, P3 f/w v1.5  is up on the website at:
http://www.elecraft.com/software/P3/elecraft_p3_software.htm

As with all of our s/w, it is a download from the site for the P3 and is
not included with the P3TXMON kit.

73,
Eric
/elecraft.com/

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Re: [Elecraft] K3: 630m amplifiers

[Vic Rosenthal 4X6GP/K2VCO]

A CW amplifier can be designed to run class-C but to be keyed in such a 
way as to pass through the linear portion of the amplifying device's 
curve when a CW element is starting or ending, in order to preserve the 
shaping.


A simple example is the tube-type amplifier that has just enough fixed 
bias applied to allow a small amount of plate current to flow (class 
AB), with a grid resistor that provides the rest of the bias as a result 
of rectified grid current as the drive ramps up. At full power the tube 
is running class C with bias way beyond cutoff.


Good 1950's technology that can be made a little more sophisticated and 
applied today!


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 27 Jul 2015 07:32, Alan wrote:


 > CW would be another mode that would not need a linear amp I think.

No, CW requires a linear amplifier.  CW is not constant-amplitude - the
amplitude changes every time you open or close the key.  A class-C
amplifier would mess up the key shaping, causing key clicks.

Any true FSK or MSK signal should not be bothered by a non-linear
amplifier.  The only caveat I can think of is that the amplitude of an
AFSK signal may have some ripple on it to the extent that the passband
of the transmit crystal filter is not flat.  But I doubt that's a
significant issue.

Alan N1AL

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Re: [Elecraft] Miniature self-supporting HF antennas

[Vic Rosenthal 4X6GP/K2VCO]

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Re: [Elecraft] [K3] Real Time Clock Battery replacement

[Vic Rosenthal 4X6GP/K2VCO]

I have K3 serial number 7 and I forgot it had a realtime clock or the 
last time I set it. It is off about 30 seconds now.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 18 Jul 2015 20:28, Geoffrey Downs wrote:

In the next few days I’ll be taking apart my trusty K3 #266 to
install K3SYNAs and do KBPF3 mods. As it’s seven and a half years old
I could also replace the clock battery while I have it exposed or I
could leave it to see how long it keeps going. Has anyone’s K3 clock
battery run down yet? Any views on how long it should last?

73 to all,

Geoff G3UCK

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Re: [Elecraft] Another one of those filter questions

[Vic Rosenthal 4X6GP/K2VCO]

You are correct that the offset is zero for 8-pole filters.

What I do is adjust the filter gains so that there will be no change in 
signal strength when switching filters. You can do this by ear if you 
turn off the AGC, or you can use the K3's DBV function if you are a 
perfectionist.


I found -- and you may get very different results -- that the following 
gain values were about right for my filter complement:


2.8 kHz  0 dB
1.0 kHz  1 dB
400 Hz   5 dB
200 Hz   6 dB

73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 16 Jul 2015 11:19, G4GNX wrote:

I purchased a 400Hz 8 pole (Inrad) filter and installed it in my K3 yesterday.
There were no markings on the box and some obscure numbers on a small label on 
the side of the filter case, but there was no offset figure.
The Cady book mentions that for 8 pole filters an offset is unnecessary, so I 
presume this is correct?
It also mentions adding a small gain figure of 1 or 2, what do others normally 
do for a CW filter?

73,

Alan. G4GNX

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Re: [Elecraft] K3 FD report in high RF (K3 vs Flex 6xxx)

[Vic Rosenthal 4X6GP/K2VCO]

A couple of years ago I asked W1RFI at Visalia how come they would 
include a picture of a very sharp keying waveform and a spectrum display 
showing loud clicks or phase noise but not interpret it for the less 
technical types. He said that if you want that you should write to the 
editor of QST and tell him.


So that is what we should do about these issues.

73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 1 Jul 2015 19:06, Jim Brown wrote:

On Wed,7/1/2015 5:17 AM, Joe Subich, W4TV wrote:

The K3 and Orion transmitters have much less spurious (particularly
transmitted phase noise from the K3) than most other transceivers while
the Flex is one of the dirtiest according to ARRL Labs.


Yes, ARRL Labs tests are damning, though you would never realize it if
you only read the text. When is ARRL going to assign technically
competent authors to these reviews?

That said, Flex did issue firmware/software that is said to reduce
keying sidebands. I've been trying to coordinate with a local 6700 owner
to test it here.

73, Jim K9YC

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