On Mon, 31 May 2010 21:00:32 -0400, Tom W8JI wrote:
>Something else was going on Jim. Not shielding.
>In short,
>the "antenna" used on the analyzer has increasing
>sensitivity for a given flux level with frequency.
Agreed. But there's more -- my amp, a Titan 425, has an L network
output, and
On Mon, 31 May 2010 22:38:30 -0400, Bill Tippett wrote:
>In 1994 he unveiled the Bose
>Auditioner program, a software tool that allows acoustic engineers to
>hear precisely what a proposed audio system will sound like from any
>seat in a large venue even before building construction begins.
>On t
Every since the last Field Day, my K2/100 (#3713) loses output, and the
receiver goes dead, on 40m and 80m when it gets hot. This occurs for
power levels of 9 watts and 100 watts. The 30m through 10m bands are OK.
I can easily replicate the problem when the power amp is connected, but
so far it see
On Mon, 31 May 2010 21:50:34 -0400, Don Wilhelm wrote:
>I believe the key word here is "psychoacoustics".
Well, we're a bit off topic here, but psychoacoustics is a
very mature science that studies how humans hear and perceive
sound. I'm a member of the Acoustical Society of America, and
that
Good news - the rig is on the air! I have made two QSO's on it so far. I
tried holding off to get one of my friends to give me the first QSO but I
scrolled past a guy calling CQ and just couldn't resist HI. So I have two
QSO's on the rig so far.
I tuned the filters first with the receive method.
250w switchable 1:1 or 4:1
Assembled and tested, but never used.
$40+shipping new from Elecraft
$25 plus USPS or UPS from me
Please contact me offline
Randy K6CRC
K3 #2051
k6...@arrl.net
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Necessary bandwidth for 75 baud 170 Hz shift RTTY is
about 360 Hz - approximately (75/2 * 5 + 170). A 400
Hz roofing filter is probably close to optimum for
75 baud RTTY.
Note - 200 Hz is theoretically too narrow for even 45.45
baud RTTY (necessary bandwidth approximately 280 Hz).
73,
...
Richard,
Normally, the reflector does not see the testing results of Alpha
firmware. In this particular case, the alpha level firmware was sent to
a number of folks who requested it, and some of them reported their
observations on the reflector.
Normally, the alpha firmware is available to the
> I noticed for the first time a discussion of "wonders" and "glitches" of
> alpha software for the first time on the reflector. Why?
>
Occasionally an alpha tester will inadvertently copy the reflector
rather than the alpha testers or firmware developers.
You can be sure that when firmwar
On Mon, May 31, 2010 at 9:50 PM, Don Wilhelm wrote:
> I believe the key word here is "psychoacoustics".
Psychoacoustics is the study of subjective human perception of sounds.
It has nothing to do with creating artificial "ear shattering bass"
in boom boxes.
"In the late 1960s, as a part of ong
I noticed for the first time a discussion of "wonders" and "glitches" of alpha
software for the first time on the reflector. Why?
R Thorpe AC9D
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That revision will never come "off beta". Elecraft does not work the
revision levels that way.
The firmware Field Testers (and a few others) are currently working with
version 3.99.
If that version is OK, it will be moved to Beta status (prospects are
not good for that, there are a few bugs).
W
> June 12 is the Bartg Sprint 75 (test) Contest.
> At this speed, what is the best filter to use and can we
> still use the so sharp Dual PB?...
I just read the rules. The shift is not specified, only the data rate
as being 75 bps rather than 45 (or 45.45) bps.
The K3 DualPB filter for AFSK or
And if so, when specifically shall it come off Beta.
Thank you.
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This is the reason I purchased Dynaco A50's back in the 60's. They were
very close to flat. Music sounded as close to live as I could afford.
Bill
K9YEQ
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm
Sent: Mon
I believe the key word here is "psychoacoustics".
A lot of non-audiophiles seem to like a lot of bass - even to the point
of distortion.
Listen to the bass-rumbling of many autos on the road - it drives me
nuts at traffic lights, but for some reason or another,
"earth-shattering bass" that shake
Hello Group.
June 12 is the Bartg Sprint 75 (test) Contest.
At this speed, what is the best filter to use and can we
still use the so sharp Dual PB?
Claude Du Berger VE2FK
ve...@arrl.net
http://www.contestgroupduquebec.com/
http://sites.google.com/site/va2upcontesting/Home
___
Deane,
Something is wrong, a mic gain of 56 should produce lots of overdrive.
You either have a mic problem or a K3 problem. Try another mic if you
can (trying another K3 may be more difficult :-) ).
73,
Don W3FPR
Deane Walkington wrote:
> My K3 has an internal 2M module which is working very
Don (and all) -
Thanks for the info. I had totally forgotten about using that center screw
terminal on the grounded outlets. D'hhh! Homer Simpson mode after too
many Memorial Day cold Heinekens!
73, Jim
--
View this message in context:
http://elecraft.365791.n2.nabble.com/K3-Assembly-Stati
Jim,
Assuming you have modern electrical wiring (2 wires plus ground) at all
your wall receptacles, just connect it to the center screw of a nearby
receptacle plate. That is sufficient grounding for anti-static
protection. It will not suffice for station grounding for lightning,
but that is
Hi Deane,
I too have the MH2 and the XV144 and my FP MIC BIAS is set to High
I use Mic Gain 10, Comp 0 for FM and Mic 10, Comp 20 for SSB
Jeff Cochrane
VK4BOF
Innisfail QLD
Australia
Elecraft K3 #4257
- Original Message -
From: Deane Walkington
To: Elecraft Reflector
Sent: Tue
> I do have an HP 3590D spectrum analyzer sitting in the
> shack, and put a
> simple loop on it to look at 2nd harmonics from my Ten Tec
> 425 amp and 160M
> vertical. It was about -44 dBc when I started, and I got
> it down to the rated
> -50 dBc by doing nothing more than changing coax jumpers
My K3 has an internal 2M module which is working very well. However since
installing the 2M module some two weeks ago I have a mic/power problem on
the HF bands.
When keying the mic on 2M I see a 10 W reading on the power barograph and
the power reading in the VFO B area is 1.01 Mw which is what
>So I wonder, do people still use straight keys these days?
Yes www.skccgroup.com
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> My rule, learned the hard way -- stick to first quality, name
> brand connectors. Amphenol isn't cheap, but that's all I buy.
> If I were a mfr with a decent lab (like Tom, or W2VJN) and
> could do serious testing of other products, I might add other
> mfrs to that list.
>
We used King
Jim Brown-10 wrote:
>
> On Sun, 30 May 2010 03:37:25 -0700 (PDT), Bill W4ZV wrote:
>
>>Dr. Amar Bose taught the introductory circuit theory classes (6.01 and
6.02)
>>at MIT for many years. He was unquestionably the best true teacher I've
>>ever had in my life.
>
> So I've heard. But Bose as a
Hi All,
Getting ready to take delivery of my K3/100 kit on Tuesday afternoon and
expect to start assembly after I stop slobbering all over the cool box of
"stuff"! I've got a nice anti-static mat and attached wrist connector that I
got from Fry's just for this project.
That was the good news. Th
On Mon, 31 May 2010 18:59:20 -0400, Tom W8JI wrote:
>After making dozens of measurements here, I concluded the
>major problems I had were from antennas coupling to antennas
>(even at 1000 foot spacing) and how connectors were mounted
>on radios and amplifiers, and things like BNC and phono
>co
Thanks all! My K3/10 is almost always running at 5w CW.
I'm really surprised and grateful for the great ears and enormous patience
DXers have shown responding to my puny signal.
I did note that the 70ft run to my dipole via RG213 was right on spec when I
measured it at 0.5db of loss. But the 20ft
I assume that since the posting is a month old it is gone...but if not,
please email me direct at watchesandclo...@rogers.com
Thanks, Larry VE3LR
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> One thought. If you're going to operate SO2R and run
> power, you should
> probably use the bigger coax for the jumper, because the
> more robust shield
> can help interstation crosstalk. I did that in my shack
> for that reason, and
> it made a difference.
I'd be very surprised if that had
Thanks all for the input. I'll just run 8X jumpers from my bonding panel to
the K3.
-
"Bigger coax" is unlikely to bring better shielding, -unless- it's double
shielded, as in RG-214. There
> If you want to switch in real time (say on alternate sweeps, so the
> P3 can display both main and sub "at the same time") then you'd need
> to use solid-state switches. Probably several sections to get the
> required isolation.
I don't know that the requirement is for alternate sweep dis
On Sat, 29 May 2010 11:10:39 -0700 (PDT), Brian - N5BCN wrote:
>Thanks for any suggestions!
W4TV has given you great advice. 99.9% of all amplified speakers have RFI
problems at some frequency, including pro products with major brand names.
The usual causes are 1) lousy shielding 2) lack of RF
On Sun, 30 May 2010 03:37:25 -0700 (PDT), Bill W4ZV wrote:
>Dr. Amar Bose taught the introductory circuit theory classes (6.01 and 6.02)
>at MIT for many years. He was unquestionably the best true teacher I've
>ever had in my life.
So I've heard. But Bose as a company is not at all well respecte
Vidi,
If it is the 100 watt K2, I strongly recommend adding the KPA100UPKIT -
that change was made because some KPA100s tended to develop a parasitic
on 40 meters. You should also install the upgraded shield kit.
If you have the 10 watt K2, then there is another problem and we need
more detai
On Sun, 30 May 2010 15:37:23 -0400, Jim Miller wrote:
>Thanks all for the input. I'll just run 8X jumpers from my bonding panel to
>the K3.
One thought. If you're going to operate SO2R and run power, you should
probably use the bigger coax for the jumper, because the more robust shield
can hel
On Sun, 30 May 2010 15:13:19 -0400, Tom W8JI wrote:
> There is some bad information on Internet
>about it and some real wild myths,
YES.
That said, some of the "misinformation and myth" is based on
the use of cheap, no-name junk connectors sold at hamfests and
on the internet, often by "resp
On Mon, 31 May 2010 12:19:29 -0400, Ross Primrose N4RP wrote:
>Why does the K2 manual tell you NOT to used enameled wire for T4?
I haven't studied that circuit,but I'd guess it's because the
dielectric of insulated wire changes the stray capacitance, which
changes the tuning of the circuit.
7
On Mon, 31 May 2010 16:38:11 -0400, "John, KD8K"
wrote:
Yes, the QSK is much improved.
Good work guys!
[snip]
>By the way, I really like the new QSK+ mode. It may be the best QSK I
>have heard on any rig. Thanks!
>
>73, John KD8K
[snip]
Thank you all, that was most educative. And I apologize for the
provocative question - I simply couldn't restrict my curiosity.
--
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If you don't have a DVR, you probably now have it turned on in CONFIG:
KDVR3. Set it to "not inSt".
I've done just about every beta firmware and a lot of alphas. Rarely,
will sometimes get bit changes to config settings when installing new
firmware. Have never been able to make it the same rese
On Mon, May 31, 2010 at 5:14 PM, David Quental wrote:
> Hello all,
>> I must agree. It's really awesome QSK and for some strange reason I find
>> that I can send faster and with less errors with the internal keyer. The
>> sidetone seems more articulate or maybe the response to the paddle commands
3.99 Alpha. Something similar. Frequency is 7012 but don't think that matters.
Set to CW. Turn on SUB. Double tap A>B. SPLIT. BSET. MODE to SSB.
Clear BSET. TUNE. Clear TUNE. Sub RX now has some very strange
audio as if went to CW filter but shift is way high. Hitting BSET to
view SUB s
Hello all,
> I must agree. It's really awesome QSK and for some strange reason I find
> that I can send faster and with less errors with the internal keyer. The
> sidetone seems more articulate or maybe the response to the paddle commands
> are faster...Whatever...I like it. RIT will be nice to
I must agree. It's really awesome QSK and for some strange reason I find
that I can send faster and with less errors with the internal keyer. The
sidetone seems more articulate or maybe the response to the paddle commands
are faster...Whatever...I like it. RIT will be nice to have back.
Steve
N
I have the same thing occurring here with 3.99. When working split, as
soon as I transmit, sub RX reception quits. (just a slight noise in
background on the sub rx, like a receiver that has no antenna
connected). This was on CW. Both the sub and the main receiver was set
to the same mode (CW).
On Mon, 31 May 2010 14:53:52 -0500, Gil WA5YKK
wrote:
>From page 67 of the manual...
ERR DVR
Digital Voice Recorder not found DVR module may be defective or
incorrectly installed, or the MCU or DSP firmware may require
updating.
I keep a copy of the K3 Manual PDF file on my desktop. These PDF
Elecrafters,
I bought a K2 already built up from a friend while on a trip to the USA. It
is serial number 1008. It is stable on all bands except on 40m where it breaks
into oscillation as soon as I start sending CW, even with the power output set
to a very low level.
I would appreciate
To anyone who has had the same experience
I'm at yet another standoff point with my K3, latest firmware update,
everything installed, and just two days ago I got "ERR DVR", so I looked
it up. Not one such item listed, just a notation that I made myself, and
I can't recall what I did to c
The K3's S-meter reads up to S9 + 60 dB, which is -13 dBm. The noise
floor in 500 Hz bandwidth with preamp on is around -136 dBm. So an IF
switch really needs more than 120 dB isolation to avoid cross-talk
between the main and sub-receivers.
That is certainly possible but it's not trivial either
It will be good to see Eric at Friedrichshafen. In the case of Elecraft, I
would purchase a cap if available. Now I can see the P3, which has already
been ordered.
73 Doug EI2CN
PS
1) It will be possible to take FCC exams on Saturday at Friedrichshafen.
2) I plan to be there fo
I can replicate this (with 3.99alpha) but only if I have VFO A in CW mode
then SUB in SSB mode.
If the same mode in A and B (main and sub) then problem is not active.
It seems to be something around mode switching...
so my few cents...
73!
Lexa, OK1DST
2010/5/31 Barry N1EU
>
>
> JohnK1JD wrot
Hi Guy,
All OK !
Effectively, i don't envisage to "look" for 50MHz activity
on the P3 during transmitting on lower bands.
I will look at the K3 schematics how are switched
antennas, KAT3, KRX3, etc.
I'm not 100% ok with all these connections for the moment...
and how TX/RX switching is done...
Ross,
3 reasons I can think of:
1) The enamel wire supplied is a smaller gauge than the green and white
wires that are also supplied.
2) If the enamel wire is scraped in the process of winding T4, there can
be a shorted turn produced.
3) If the smaller wire is used, it may overheat also producin
3.99 is in alpha test at this point. It mainly includes QSK and high
speed CW improvements.
On Mon, May 31, 2010 at 11:58 AM, Fred Atchley wrote:
> John, are you referring to V3.97?
>
> On another note, for my ears, the NR in V3.97 is night and day better than
> any so far. At the lower odd numb
Both.
I still have my Skilcraft straight key that I started with in 1958 as
a Novice. And added a Bencher BY-1 paddle a couple years ago (which
I am still getting used to using). Full disclosure is that I have
been off CW for several years (except for eme where I use a computer
to generate C
I use my 1930's brass straight key regularly! The rest
of the time I use an Elecraft / Bencher HexKey. One of
the best paddles I've ever used. (:-)
I have a small box to switch the two between the K2 and
the K3.
73! Ken Kopp - K0PP
elecraftcov...@rfwave.net
___
There has been a revival of operators using straight keys, bugs and cooties.
Some are very good to the point that you can hardly tell what key they are
using. Some are in the learning/relearning phase and are not so good. The
Straight Key Century Club www.skccgroup.com is a group of such enth
JohnK1JD wrote:
>
> I really like the QSK improvement at ANY speed, but discovered a glitch
> with ver 3.99 this morning. This occurred in split mode (QRQ CW must be
> off to do this) with the sub RX on. The sub RX works fine until
> transmitting, then mutes and will not come back to life until
I don't doubt for an instant what you say.
I'm thinking the common ground path issues and cable routing issues
would get it, not that you couldn't do it with the relays
"standalone". And then the complaints would start about hearing
signals move in one RX while tuning on the other, starting with
Hi Elecrafters,
The June issue of the German Ham magazine "Funk Amateur" has just arrived.
There is a P3 presentation (page 590), which also announces Eric's
presence at the International German Hamfest at Friedrichshafen last
week-end of June for a first European presentation of the P3 (Boot
On May 31, 2010, at 9:54 AM, Alexey Kats wrote:
> I apologize if my question is not related to elecraft products at all,
> but I am simply curious... Of all fine folks using Elecraft
> transceivers, do you still use straight keys or bugs? Or are you using
> paddles and keyers all the time?
>
> I
Why does the K2 manual tell you NOT to used enameled wire for T4?
73, Ross N4RP
--
FCC Section 97.313(a) “At all times, an amateur station must use the minimum
transmitter power necessary to carry out the desired communications.”
__
E
On Mon, 31 May 2010 10:24:02 -0400, Guy Olinger K2AV
wrote:
>One of the things you will hear on the air is computer generated
>keying with "contest spacing" which is a design "cram" to shorten
>sending time without too much of a reduction in readibility. Once
>used to it, some prefer it. These
On Mon, 31 May 2010 06:54:17 -0700, Alexey Kats
wrote:
Yes, straight keys and bugs are still used, although only about ten to
fifteen percent of the users have mastered them. Those who have
mastered them send pretty darn good code. I was never able to master
the bug, but learned the straight ke
John, are you referring to V3.97?
On another note, for my ears, the NR in V3.97 is night and day better than
any so far. At the lower odd number settings (e.g. dash 1) The signal is not
significantly degraded but there is a noticeable reduction in noise.
73, Fred, AE6IC, K3 2241
_
On 5/31/2010 6:59 AM, Alexey Kats wrote:
>>> Anyway... I know that older version of K2 manual refers to changing
>>> winding of T4 transformer to 2:2 (instead of original 2:3) in order to
>>> increase efficiency of CW performance on 5W or less.
Keep in mind that the 25% decrease in current draw a
Hi Alexey,
I am one that uses a straight key - thats the way I started and
although I have played with paddles and bugs I always seem to revert
to the old navy straight key I have had since 1955.
Larry Ingram AG4NN
At 09:54 AM 5/31/2010, you wrote:
>Of all fine folks using Elecraft
>trans
The short answer is that if the battery is discharged, you
will, at least in the initial phase, be severely overcharging it and in the end
phase, be undercharging it.
At the very least, as a rule of thumb you should limit the current initially to
something under C/4, where C= AH rating = 5A.
Assuming it is like any typical lead acid battery charging
voltage of a six cell lead-acid battery, to fully charge the
battery, is over 13.8 volts.
It has to under 14.7 volts to prevent excessive gassing,
14.4 volts is generally the gassing threshold.
Most of the stuff here that includes a vo
Others are asking for that to be switchable back and forth
between the
two *dynamically*. This involves both IF's and allows for
signals in
the IF of one RX to be heard in the other. This would a
switch with
100 dB isolation. It would be an expensive option, plus
some
significant new code.
Yeah,
The rub is getting Wayne to add an option that will look at the subRX
for the P3 interface functions. Think you might get what you're
asking for.
Others are asking for that to be switchable back and forth between the
two *dynamically*. This involves both IF's and allows for signals in
the
I use my Dad's old j11 straight key once in awhile...but I love the
ticks that quietly emanate from by bencher and Kent paddles, too. No
keyer here.
Greg Doughty
>
> On Mon, May 31, 2010 at 7:54 AM, Alexey Kats
> wrote:
>> I apologize if my question is not related to elecraft products at
Yes, operation here is almost exclusively straight key or bug. I use
my Swedish Pump style straight key at least 50% of the time, it's a
dream to operate.
Bob NW8L
On Mon, May 31, 2010 at 7:54 AM, Alexey Kats wrote:
> I apologize if my question is not related to elecraft products at all,
> but I
Ok, I have a 12vdc 5ah lead acid battery. I have a 15amp 13.8 volt
power supply I use for my qrp power. Can I charge the battery with
that supply? How do I know when it is fully charged, etc
Greg Doughty
Ki4bbl
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I use the internal K3 keyer with a Kent iambic paddle -- but I work a LOT of
guys (mostly in the US) who are clearly using bugs -- often poorly adjusted
bugs IMHO. I used a bug for years back in the day. Getting the dits just
right takes a little patience and a good ear, and not everybody has bo
One of the things you will hear on the air is computer generated
keying with "contest spacing" which is a design "cram" to shorten
sending time without too much of a reduction in readibility. Once
used to it, some prefer it. These settings are available in various
contest boxes (Microham, etc) an
YES we use straight keys all the time. Listen on 7040 and above.
End of msg.
73
Steve
N4LQ
- Original Message -
From: "Alexey Kats"
To:
Sent: Monday, May 31, 2010 9:54 AM
Subject: [Elecraft] One more question about CW operation
>I apologize if my question is not related to elecraft pro
No worries, I'll do that (I hate it myself when I have to work on
customized equipment when the owner either forgot about it, or didn't
even know about it since it's not the original owner). Fortunately,
the last time it happened with me was many years ago. And the most
embarrassing part was that w
I apologize if my question is not related to elecraft products at all,
but I am simply curious... Of all fine folks using Elecraft
transceivers, do you still use straight keys or bugs? Or are you using
paddles and keyers all the time?
I am asking because so many times I am hearing almost the same
Alexey,
The R2 that is referred to by DK3RED is on the Front Panel - it is the
power control pot.
There will be no change to any of the alignment procedures with the
change in the T4 winding ratio.
Please put a sticker inside your K2 stating that the T4 winding ratio is
intentionally changed
Thank you, Don, for responding so early (I hope you do not have
insomnia as I do). And yes, that's exactly what I am looking for - K2
restricted to 5W and to CW-only operation, so as long as it is safe
and is not going to introduce spurious emission it'll work for me.
On Mon, May 31, 2010 at 6:31
My "amateur career" has been characterized by fits and starts and a series
of really terrible station locations with concomitant crummy antennas. About
eight years ago, after a long hiatus, I purchased a K2, mainly for the
enjoyment of the build. I was very pleasantly surprised at the strong
perfor
Alexey,
Make that change IF AND ONLY IF 1) you will never install the KSB2, AND
2) you will not operate above the 5 watt level.
That change makes the K2 PA transistors more efficient at 5 watts and
below, but the operation is non-linear and the efficiency is worse if
the power is increased abo
Sorry, I managed to press the wrong key and sent it before I finished it.
Anyway... I know that older version of K2 manual refers to changing
winding of T4 transformer to 2:2 (instead of original 2:3) in order to
increase efficiency of CW performance on 5W or less. Is it still
applicable to the cu
Hello
I have the 2, 222 and 432 Ele transverters and need to drive Lunar Link amps
on 6-432 (pairs of 3CPX800s).
What have some of you VHF folks done to get up to 40-60 watts of 'clean'
drive power?
TE systems comes to mind since they use active biasing; could also use hefty
input attenuators
I have one more question about K2. I noticed that revision C of K2
manual says that if to increase QRP T4 transfor
--
Alexey Kats (neko)
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All
I really like the QSK improvement at ANY speed, but discovered a glitch with
ver 3.99 this morning. This occurred in split mode (QRQ CW must be off to do
this) with the sub RX on. The sub RX works fine until transmitting, then mutes
and will not come back to life until you turn it off then b
Hi Dave,
For the test I progammed the fan to max, after the test I put them back
to auto.
I would have mentioned it.
Tks
Philippe A65BI
>>> "Dave Hachadorian" 30-05-2010 20:32 >>>
---
From: "Philippe Trottet"
Sent: Sunday, May 30, 2010 4:40 AM
To: ;
Cc: "Elecraft List"
Hi Guy,
It's that way i was thinking to use the P3!
-1- ALWAYS on the sub-receiver output.
-2- ALWAYS on a separated antenna.
My idea was to externally switch the 6m
(or internally if possible?) antenna from
K3 sub-rcvr to main RF when some activity
was "detected" on th P3. When "working"
on 6m,
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