On 3/9/2012 5:48 PM, Guy Olinger K2AV wrote:
> OCF antennas, under miscellaneous names, have been working fine, just fine,
> just about as long as radio.
"Working fine" depends on your definition of "the big picture," and your
ability to diagnose problems. The problem with OCF antennas is COMMON
Hi Tom,
Sorry, I wasn't clear. I didn't mean that I was changing to VFO B. I meant
that the LOWER display showed the VFO A bandwidth and then the LOWER display
reverted back to showing the VFO B frequency. I was just indicating that the
VFO A bandwidth remained constant and did not flip flop from
I have very fond memories of my Carolina Windom 80 strung between two
50' Sycamore trees.
I won my section of the 1999 Nov Sweepstakes and the 2000 ARRL Int.DX
contest with that antenna an MFJ 949E tuner and 100W from my
hand-me-down TS-520.
Not bad for an antenna that "can't work".
--
R. Kev
*Kevin,
I worked the world in 1999 on an IC-706MKIIG, an SS750 Henry amplifier and
a Gary Stookey built GS3 screwdriver antenna mounted on my Kenworth 18
wheeler in the US..but they don't work either eh?
Oh well...I Can Only Monitor must mean something after all..TIC
73
Gary
The nice man in th
This thread has a count of 15. I thought I would squeeze one more in
before the end of thread is called.
Last year I performed some simple OCF Dipole investigations. My quest is
to make a 15/20 trapped OCF dipole to place in an asymmetrical location
in my attic. My rather incomplete notes can be f
Gimmick, or feature request?
>
> http://www.youtube.com/watch?v=t17ipMS8gAk
>
73, Mike NF4L
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Thanks Mike, You were right on. My K3 is new and I was doing a lot
of playing around with it and somehow managed to get things out of
whack. I shut everything down and rebooted and all is well.
Tom
KQ5S
On Sat, Mar 10, 2012 at 6:59 AM, Mike K2MK wrote:
> Hi Tom,
>
> Sorry, I wasn't clear. I d
There seems to have been no answer as to how to accurately measure the loss in
a tuner.
Here is a solution but requires two tuners or at least one calibrated one that
could be
used to measure others.
Take first tuner and tune it into the mismatch, say 600 ohms. Use an antenna
analyzer.
Then
Thanks, Don.
You can't go wrong with the K3: they're excellent radios.
As always, it all depends on what you want to do with it.
Cheers,
Alan
Alan D. Wilcox, W3DVX (K2-5373, K3-40)
570-321-1516
http://WilcoxEngineering.com
http://WilcoxPublishing.com
https://www.smashwords.com/books/view/28062?ref
That's the most expensive latte I've ever seen. :-P
73, Mike NF4L
On 3/9/2012 11:49 PM, Hisashi T Fujinaka wrote:
> So let me say one thing I know about antennas:
>
> PUT SOMETHING UP AND GET ON THE AIR.
>
> You can get perfect up, and you can get OK up. You an argue about what
> works better and
Dick,
Instead of the G5RV antenna, consider using a modified version of it, the
ZS6BKW, with your K3. The ZS6BKW antenna has better impedance characteristics on
more bands than the G5RV. The K3's ATU matches the antenna on all of the bands
that it is designed to work on, 80, 40, 20, 17, 12 and 1
Probably the most elegant solution is to actually change the physical
length of the element(s). Mike, KK5F, does that with jumpers on his
portable dipole, and SteppIR does it by spooling up the un-wanted
portion of the element. There was a design in QST that used air
pressure to operate r
Thanks for the info, Rich. It's amazing what one can start with a
question to the folk on this Reflector! Hams are truly a helpful lot.
With all the input that has been streaming in, I now have a lot to chew
on.
Thanks loads!!
--
73 de Dick, ka1oz
Elecraft K3/100
GAP Titan-DX Antenna
On Sat,
Not sure I understand your question, Mike. TNF (Tracking Notch Filters) are
a new feature incorporated into the latest versions of FlexRadio's PowerSDR.
It is not a gimmick, but a way of notching out local interference that
appears routinely or constantly on the same frequencies at you particular
l
Cheers;
I have noticed that when keying my K2 with the crystal filter cinched (200
hz-400) and my audio filter ON in either mode 1 or 2 (the K2 analog CW filter)
in certain situations I get an annoying pop or "pssst" sound when sending. I
have serial no. 2676 QRP K2 that has had the keying mod
I also have some iMic units which work well on RTTY and while they have
stereo Line In, but they do not have duplex audio that Iain is looking for.
Ed - W0YK
> On 3/8/2012 10:26 PM, wb6r...@mac.com wrote:
> > Hi Jim - I've been using a Griffin iMic for years. Reliable.
> > Inexpensive. FYI.
Hi All,
What you really need to do is to put the whole tuner inside a calorimeter
and measure the rate of temperature change to determine the the dissipated
wattage.
Tim
gm4lmh
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Well, I wanted to know if TNF is a gimmick, and if not would it be a reasonable
(all
feature requests are reasonable, right?) request to incorporate into the K3.
73, Mike NF4L
On 3/10/2012 10:44 AM, Bruce Beford wrote:
> Not sure I understand your question, Mike. TNF (Tracking Notch Filters) ar
OK, now I understand. I didn't make the connection to the K3.
It's not a gimmick, and I doubt it could be incorporated into the K3
firmware.
73,
Bruce, N1RX
> Well, I wanted to know if TNF is a gimmick, and if not would it be a
> reasonable (all feature requests are reasonable, right?) request t
I am with Ken on this one.
I use a 130 foot classic Zepp with 600 ohm ladder line to a balun and then a
short coax line to the K-3 with internal tuner. It tunes very nicely on all HF
bands 160 to 10. (Yes, even 160.)
Kim - K7IM
-Original Message-
From: Ken G Kopp [mailto:kengk...@gmai
I have my K3 connected to my KPA500 with the KPA500-K3 Aux cable. Is there a
Config Menu setting that will allow the KPA500 to turn on when I turn on the K3?
Mike, W4UM
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OK, I amend my post to say 130 foot doublet.
Kim - K7IM
-Original Message-
From: Ron D'Eau Claire [mailto:r...@cobi.biz]
Sent: Friday, March 09, 2012 8:09 PM
To: 'Ken G Kopp'; d...@w3fpr.com
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] OT: G5RV's antenna
The feeder was exactly 1
I understand that these are duplex cards:
http://www.newegg.com/Product/Product.aspx?Item=N82E16829128010
http://www.newegg.com/Product/Product.aspx?Item=N82E16829270009
http://www.newegg.com/Product/Product.aspx?Item=N82E16829180006
as is this one:
http://www.newegg.com/Product/Produ
Jacob,
Try setting 8R Hold ON. It sounds like it is set to NOR right now and
with your extended T-R delay, you are hearing the receiver unmute before
the delay time is finished.
See the K2 manual page 89.
73,
Don W3FPR
On 3/10/2012 11:20 AM, jacob chambers wrote:
> Cheers;
>
> I have noticed
Might I suggest if you are going to use fuses, invest in the oversize car
stereo type. Some are gold plated,available in cartridge and blade type.
I believe the blade type are available at wal mart. A bigger contact area
should have less resistance. Remember if you fuse the negative that will do
TNF as implemented in the current PowerSDR will not be available in NaP3
or PowerSDR/IF because it uses proprietary hardware and driver software.
Therefore, it won't be available for KX3 or LP-PAN users.
The relevant documentation is explicitly spelled out in the open source
documents from Flex
I'd put it this way: Some folks just want to get on the air and operate.
Others take greater joy in knowing they can get the most out of what is
available. There's room for a variety of operators.
EVERY station is a collection of compromises. There is no perfect station
or even a perfect portio
I have also been using the ZS6BKW with the K3 for several years at my 2nd home
in the mountains of So Cal. A few Ops in the local radio club (BBARC) are using
the "BKW" with great results.
It is very easy to construct and works great when the ladder line is trimmed
properly.
At first I was tryi
Well, I don't think you can blame OCF for TVI/RFI. You can blame radiating
RF for TVI/RFI. Some of the best improvements in RF antennary were
accompanied by increases in TVI/RFI, and that would include cleaning all
that common mode current off the feedline so it only radiated off the
driven eleme
The area I live in has gotten much noisier (QRN) over the past few years
and it's killing me. I know that there are stations I want out there -- I
can kinda sorta hear them but I can't hear them over the noise well enough
to have a QSO. As much as possible I've checked everything in the house
and
At turn on I get "ERR DVR". Any push button makes it go away and the
only problem is the DVR isn't working , nor is it "installed". The DVR
was factory installed and worked for about 6 mo. I have installed the
op system from the k3 web site twice with no "Fix". I'm out of things
to try, any
I was investigating tuner losses a few years ago and ran into many of these
same questions.
A physicist buddy pointed out to me that the normal approach to measure loss
in something like a tuner is to put it in a well-insulated chamber and
measure the rise in temperature over time while transmitt
I built a new power cord to the K3 using automotive fuses20 amp. I only
used a 5 foot piece of power cord...#12 gauge. I also changed the power supply
out for the heck of it with a Astron SS-30. Voltage is 14.2 volts to 13.3
volts
on key down. That is just .9 volt drop. That is a far
I've got one in mine and love it.
The demo's are pretty close to reality here.
On 03/10/2012 12:30 PM, Jon Perelstein wrote:
> The area I live in has gotten much noisier (QRN) over the past few years
> and it's killing me. I know that there are stations I want out there -- I
> can kinda sorta he
They would be very hard to implement in an traditional radio like the k3.
Maybe something for the kx3, however.
Richard W5SXD
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Any attempt to compare my experience with yours depends on the noise, which
is as variable one place to the next as snowflakes.
But my K2 has the noise blanker in it, in addition to the DSP and all my K2
wars with noise would have used the NB if it helped at the time, and I do
not have a researche
Jon,
The KDSP2 will reduce the noise - the nr is quite effective.
However, if you operate digital modes, I don't think you should be using
noise reduction with digital modes, it will reduce your copy. Many
digital modes can decode at or below the noise level anyway, and th
enormal recommendati
Checking the clock time on my K2 (about 10 years old now) I noticed the power
supply voltage as displayed is 2 volts lower (E 11.8) than the actual power
supply voltage which is set at 13.4 .
When I built my K2 many years ago I don't remember this being off by so much,
so is this an indicat
Hello,
It´s possible to use the logging program, for example N1MM, to send CW and
SSB messages from the local station or I must use the paddles and MIC
connected to the local remoterig?
Thanks,
Jorge
CX6VM/CW5W
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Elecraft maili
No.
Jack B, W6FB
On Mar 10, 2012, at 9:16 AM, Michael Raskin wrote:
> I have my K3 connected to my KPA500 with the KPA500-K3 Aux cable. Is there a
> Config Menu setting that will allow the KPA500 to turn on when I turn on the
> K3?
>
> Mike, W4UM
> __
As has been clearly demonstrated in this thread, there are multiple methods
of measurement. The one that gets my vote for elegance is the one with two
tuners back-to-back. With respect to the method that measures temperature
rise, taking into account the mass of the tuner, one also needs to take in
Ed,
A 2 V drop sounds excessive - the internal series protective diode in the
positive 12 V supply line does reduce the voltage sensed by the K2's
internal voltmeter, but not by more than 0.5V under normal conditions.
Are you reading the voltage on the K2 display in TX or RX mode?
What is the in
Eddy,
I suggest you investigate with your DMM.
You could have a significant voltage drop at the power cable - if there
are DC distribution boxes in the path they may be a problem, your
connectors along the path may not be tight.
What you can do is investigate whether the internal voltmeter is t
I haven't dug it up , but QST April 1995 pp. 30-34 and QST May 1995 pp.
33-37 describes how the QST lab does it.
Dave AB7E
On 3/10/2012 6:17 AM, Rick Stealey wrote:
> There seems to have been no answer as to how to accurately measure the loss
> in a tuner.
>
___
I've recently been experimenting with tuners. I have a "275 watt" Johnson
Matchbox (which
is actually good for more than a kW on CW in most cases) and a huge T network
that I just
built with a massive edge-wound rotary inductor and capacitors with air gaps of
about 3/8"
(near 10mm). The T net
On 3/10/2012 4:58 AM, Mike wrote:
> Gimmick, or feature request?
>>
>> http://www.youtube.com/watch?v=t17ipMS8gAk
I couldn't tell much difference, but then I'm about 95% deaf. Would
have helped a lot if he'd stopped talking :-)
73,
Fred K6DGW
- Northern California Contest Club
- CU in the 2012
On 3/9/2012 7:29 PM, Don Wilhelm wrote:
> I will differ with Fred - the fuse should be mounted close to the power
> supply.
I thought that's what I said ... if I didn't, I was wrong ... as close
to the power supply as possible. Many present era power supplies have
over-current protection built
I just did the following experiment: I coupled a grid-dip oscillator to my feed
line far
from the tuners and switching relays. I put it a few inches from the feedline
equidistant
from the conductors. I found that the T network plus DXE balun reduced the
signal pickup
by about 15 dB over the
Hi Jorge,
What you do is pull CAT over the internet using the COM2 port of the
RemoteRig.
If *not *using K3 Twin (i.e. software control only through the control
RRC), then this works just by using that software.
If you are using the K3 Twin, you need to change COM1 to mode-6 on the
control RR
Hi everyone- Well the time has come to sell my station. I'm living in an RV
and the wife says it goes. Some I'm going to do 2M/440 until we are off the
road in 5-7 years. I have a K2/100 with the SSB, I/O, the Elecraft
microphone. Also included are an Astron 25A power supply with Anderson
Power
Dave, I wish to disagree with you on this point. Yes, this is a
knowledge-based hobby. However, I learned enough to pass my exams and
got a wire in the trees so I could get on the air. I've spent my time
since then learning. You have the rest of your life to study and
learn. We have no cl
Thanks, Larry.
Mike NF4L
On 3/10/2012 12:50 PM, Larry Phipps wrote:
> TNF as implemented in the current PowerSDR will not be available in NaP3
> or PowerSDR/IF because it uses proprietary hardware and driver software.
> Therefore, it won't be available for KX3 or LP-PAN users.
>
> The relevant do
Who is the P3 firmware developer? Is he/she a member of this reflector?
Thanks,
Gary
N6LRV
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Gary,
That would be Alan Bloom N1AL, he does monitor this reflector, but he is
an Elecraft employee who likely works a 40 hour week from Monday through
Friday. Give him a weekend of rest and relaxation.
73,
Don W3FPR
On 3/10/2012 6:41 PM, Gary wrote:
> Who is the P3 firmware developer? Is he/
Vic,
Be aware that loss in the tuner can reduce the signal pickup - I would
not be so quick to pass judgement that the Matchbox is less efficient
than the T-network tuner - I know the link coupled tuner (properly used)
is more efficient.
You may want to double check your test conditions and in
The weekly Elecraft SSB net will meet tomorrow (3/11/12) at 1800Z on 14.3035
MHz +/- QRM. Hopefully the propagation will be better by then. I will be
net control from western Oregon, and we'll try relays to pull in the
stations that I can't hear.
See you there.
73,
Phil, NS7P
_
Ron, Rick, Erik: There are many reasons why temperature measurements are a
poor way of evaluating a tuner. There is a method of power measure based on
temperature rise. It's called a bolometer. It only works well if the mass
involved is small. Wiki bolometers if you want the details.
I think ther
This is why I checked that real signals received through the antenna were not
attenuated
to a detectable degree. I could not tell the difference between the tuners with
weak
signals from distant stations.
Reasons that the T network may be as efficient as the Matchbox for this test:
1) In this
I went to MIT. I can analyze the crap out of this if I feel like it.
Or I can work DX and ragchew.
Like I said, you use the hobby for what you want and I'm a proponent of
the proverb that says, "Perfect is the enemy of the good."
On Sat, 10 Mar 2012, David Gilbert wrote:
>
> Ham radio being a k
On Sat, 10 Mar 2012, Jim Brown wrote:
> And there is NO MAGIC to parallel wire feedline
I think the advantage (not magic) is that you get less loss in ladder
line than you do through the dielectric of coax.
--
Hisashi T Fujinaka - ht...@twofifty.com
BSEE(6/86) + BSChem(3/95) + BAEnglish(8/95) +
I bought one used a few years ago and never installed it until I dug my
radio out of a box and put an antennna back up. I played with them in
the past and thought they made things sound funny.
However, I also got a new heat pump that puts all sorts of funny noises
on 15M. I switched on the DSP and
Bolometers work at pretty low (milliwatt) power levels and you would need to
use an attenuator, which could add some error to the measurement. Hewlett
Packard made the HP434A Calorimetric Power Meter, which could measure up to 10
watts by matching the temperature in a load with that caused by D
That reminds me of a couple of sayings:
Good enough is perfect.
There comes a time in any project when you need to shoot the engineers and
start production.
Bob N7XY
On Mar 10, 2012, at 5:10 PM, Hisashi T Fujinaka wrote:
> I went to MIT. I can analyze the crap out of this if I feel like it.
>
And I went to CIT (Case Institute of Technology) - way back when -
which was back in the '60s a rival for MIT in the forefront of
engineering cutting edge technology. After suffering through "Geunter's
Green Book" which was an attempt of an author promoting and refining
his book advancing hi
So, the Calorimetric HP meter uses the same principle as my suggested
measurement, with the only difference being that HP performs the reference
measurement simultaneously with the target measurement rather than
sequentially.
Erik K7TV
>Hewlett Packard made the HP434A Calorimetric Power Meter, wh
The nice thing about the KDSP2 is that you can tailor the settings to do
different things when required. I have had good luck reducing atmospheric and
similar wideband noise, effectively lowering the noise floor (sometimes to the
point where, in the lack of a received signal, you can hardly te
OK folks, I am really truly sorry I started this
tuner-efficiency-by-measuring-its-heat thread. I apologize. It was
sort of an e-nerd joke and I really miscalculated the laugh-factor in
it, it seems there was none, an unfortunate failing for me ... but too
common. Boltzmann's Constant is in
Great humor, Hisashi Isn't it just so? So many years, so much
experience, but the operations matter so much more. With my KX3 I am
hauling out all my old self-made antennas, including a super flex multiband
dipole in a 35 mm camera film can. Love to play.
73,
Bill
K9YEQ
-Original Mes
Don,
This explains much about your excellent approach to issues. I started in EE
and changed to Economics in the 60's. I love electronics but the theories
and dedication to such intricacies bored me to death. I love to play with
radios, learn what I actually need and leave the rest to those wh
Fred,
I would not apologize. I have enjoyed the thread which is about dead anyway.
73,
Bill
K9YEQ
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Fred Jensen
Sent: Saturday, March 10, 2012 8:17 PM
To: elecraft@mailman.qth
The standard, for vehicles, is to connect to the provided binding post, then
run absolutely no more than 18 inches unfused. This allows the fuse to be
placed for access. It also allows for shorted wires.
--... ...--
Dale - WC7S in Wy
_
On 3/10/2012 5:14 PM, Hisashi T Fujinaka wrote:
> I think the advantage (not magic) is that you get less loss in ladder
> line than you do through the dielectric of coax.
FALSE! For all practical purposes, there is NO dielectric loss in coax
below about 500 MHz, where it just BEGINS to show up.
On Sat, 10 Mar 2012, Jim Brown wrote:
> On 3/10/2012 5:14 PM, Hisashi T Fujinaka wrote:
>> I think the advantage (not magic) is that you get less loss in ladder
>> line than you do through the dielectric of coax.
>
> FALSE! For all practical purposes, there is NO dielectric loss in coax
> below a
As one Fred to another it was funny in the heat of the battle so to speak.
It fooled me and perhaps the case hardened too. Well done.
73
Fred, AE6QL
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Fred Jensen
Sent: Saturday,
*snicker*
On 03/10/2012 09:42 PM, stephen pearce wrote:
> Hello
>
> I hope my message reaches you well. Kindly observe utmost confidentiality
> with what I'm about to tell you. I don't want some of my other friends to
> know about this. I had an urgent trip to Spain for a business Seminar but
> I'
>I think you're wrong here. The high SWRs generated along the feedline
>are extremely high voltages (with low currents) and there is significant
>loss in the dielectric of the coax. The reason that ladder line is
>better is because of the air in the dielectric. The best is the old
>school ladder li
On 3/10/2012 8:40 PM, Hisashi T Fujinaka wrote:
> I think you're wrong here.
The math is VERY well known. There's are a couple of excellent technical
papers about this in one of the ARRL Antenna Compendiums. Another
place to see this is on the Times data sheets for their LMR cables. Look
bel
On 3/10/2012 9:05 PM, Gary Ferdinand wrote:
> The OWL does not suffer from the dreaded detuning in the rain nearly to the
> extent of ladder line.
Right. And while there is some change in the impedance, the primary
effect is dielectric loss due to moisture on the "solid" portions of the
window
On Mar 10, 2012, at 11:59 PM, Mark Stennett wrote:
> *snicker*
*Crackle*
But what I really wanna know is, did the thugs that robbed him also steal his
K2?
>
--
Buddy Brannan, KB5ELV - Erie, PA
Phone: (814) 860-3194 or 888-75-BUDDY
On Mar 10, 2012, at 11:59 PM, Mark Stennett wrote:
> *sn
On Sat, 10 Mar 2012, Jim Brown wrote:
> On 3/10/2012 8:40 PM, Hisashi T Fujinaka wrote:
>> I think you're wrong here.
>
> The math is VERY well known. There's are a couple of excellent technical
> papers about this in one of the ARRL Antenna Compendiums. Another
> place to see this is on the Tim
We have placed the original poster's address in moderate mode. Apparently his
email address or pc has been hijacked.
End of this thread. No need to comment further on-list.
73,
Eric
Elecraft list moderator
www.elecraft.com
_..._
On Mar 10, 2012, at 9:25 PM, Buddy Brannan wrote:
>
> On Mar
I have a 425 foot run of "window line", specifically Wireman #554 down to
my 160 antenna base. The "detuning" that is referred to is really a change
in the dielectric: from PE to PE+water. That changes the loss (change =
.5 dB at 1.830), but more particularly the velocity factor, which changes
t
Good Evening,
The sun has been quite active this week. I have been following the
news since Paul Harden first sent a message to QRP-L. Here are two
links to follow the action:
http://spaceweather.com/
http://iswa.gsfc.nasa.gov/downloads/20120310_202000_anim.tim-den.gif
Today the solar
My K3/100 has developed an intermittent transmit fault. The power
drops to a very low, but not zero, level at any power setting using
either the LP or HP PA.
The symptoms/set up are as follows:
Mode CW
Using the KPA500 with it (not sure that is relevant)
ATU not in circuit
Power is low as display
Don,
When I started work at NASA's Lewis Research Center in the early 60's
we often went to seminars at Case. Local legend had it that in one of
Dr Green's classes he presented a research problem that he himself
was working on and told the class that anyone solving it would be
awarded a master's
Very interesting discussions about tuners/loss I didn't understand most of what
was discussed anyway, hihi.
I have a little tuner history if anyone is interested.
In a letter from Don Wallace W6AM, years ago, he told me he swore by the
Johnson Viking Kilowatt tuner. He had one connected betwee
I'm fantasizing about a new radio and I do know how much I like my K2. A
K3 would be the obvious progression. But a friend told me how much he
liked the Icom 7600 and wow are there some nice bells and whistles on
it.
I want to know tech specs. I trust that I could email Elecraft and get
much bette
On 3/10/2012 11:09 PM, Hisashi T Fujinaka wrote:
> But a friend told me how much he liked the Icom 7600 and wow are there some
> nice bells and whistles on it.
I used one on Field Day a year and a half ago. Yes, it was pretty, but
it put out enough trash to bother other stations in our group. On
Here's a link the the Sherwood specs. The IC-7600 is a decent radio, but
you can get nicely appointed K3 and you'll have a better radio in all
respects, excepting the fish-finder.
http://www.sherweng.com/table.html
Notice that the IC-7600 has the 25th ranked receiver in that table. The
Icom's
That's not the point. There are those who enjoy ham radio for what they
learn from it, and from optimizing their stations. There are others who
simply enjoy operating and don't really care much what is behind it.
Either are perfectly valid (this is a hobby, after all), but you're the
one w
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