Guys,
I put up a new tribander.
I had a difficult time tuning it up so that CW/RTTY segments allowed
full KPA-500 power without tripping w/o a tuner. It's OK that higher
phone segments need a tuner.
Part of the problem had to do with the differences seen between K3 and
KPA-500 SWR's. Show
On 11/9/2012 04:55, David G4DMP wrote:
In a recent message, Gary Smith g...@ka1j.com writes
I would love for there to be a USB
connection for the K3 without the serial
to USB adapter.
It would put the cost up, Gary. I understand that USB is like Dolby in
that it is a proprietary protocol
This seems so in many cases but it is very doublet length dependent.
I ran one case in TLW with 45' of 450 ohm line that came out as 13 ohms.
With a 4:1 balun you'd probably be dropping this further. High
current and most likely not a match.
The best suggestion is to model the antenna at
Passive 3606
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Brian Alsop
Sent: Wednesday, November 28, 2012 1:48 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] CW Skimmer K3
The +/- 12 KHz limit can be overcome
A year or two ago I obtained a K3 subrx definition file SKIMMER.
Clicking calls on the bandmap or call list and sends VFO B there.
It only works if you have a subrx and are tapping the subrx IF. (I
think) I don't know what will happen if you are in split w/o a subrx
using VFOA IF output.
I
Getting this combo to work here was an interesting challenge.
1) The RCS-10 control box outputs a 3 bit binary signal to control 8
antennas
2) Several antennas that are multiband.
3) I have a remote A/B switch box with that is DC powered over the coax.
4) I wanted to also have the KPA-500
Carl,
You are right.
You can do it yourself though if you have a subrx.
http://groups.yahoo.com/group/Elecraft_K3/files/KRX3_IF_Out/
Works just fine.
At one time, I fooled around with duplicating the K3 JFET output
circuitry present in the main RX. The use of the Clifton Labs
Was checking out RTTY decode which worked fine. Decided to look at CW
decode.
Here are my observations.
Not working well here or op here inept at using it.
My perception is that it did much better in older versions. However, I
didn't use it much then.
ZL9HM was 599 @35 wpm this AM. WPM
Jerry,
If you want some numbers to chew on.
@65' a 40 meter dipole has an impedance of about 73 ohms. SWR=1.5
The same antenna on 20M has an impedance of 3788 - j1648 ohms with an
SWR of 89! Very high impedance. Why the K3 matched it, I can't say.
Do you think the KAT500 should be able
This whole issue has been solved by VHF/UHF stations a long time ago.
They use a sequencer to key and unkey various components with
appropriate delays to prevent damage.
They can be built or bought fairly cheaply.
Yes it would be desirable to have the sequencing be automatic. One
size is
I'm wondering if others might benefit from an additional bit being added
to the ABCD band data making it ABCDE. This could permit:
1- 32 choices (programmable by the firmware program?)
2- phone/cw antenna automatically being switched or another antenna
being switched to at a certain cutoff
Sure could have used the extra 5-7 db when chasing the recent ZL9
Dxpedition on RTTY from the East Coast.
73 DE Brian/K3KO
On 12/18/2012 20:31, Phil Hystad wrote:
I agree, the path is clear -- it is obvious --- sell the Commander as 5 to 7 dB
is not worth having extra stuff around to fool
The first rule in troubleshooting is to unplug everything that isn't
absolutely necessary to the equipment being diagnosed.
In this case all that would be needed is power, ant/dummy load and the K3.
Then start plugging things in until you find the offending device.
73 de Brian/K3KO
Ian Kahn
Guys,
I found it interesting that PSK31 signal strengths on my panadapter are
as large as typical CW/SSB signals.
Either there is something magic about PSK or PSKer's are not the wet
noodle/5 watt crowd any more.
73 de Brian/K3KO
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Jay,
I had one of these in my attic for several months.
I had to tune each band by generally shortening the elements.
Start at 10M. Find its resonant point via antenna analyzer or by
sweeping frequencies with your SWR meter. You need to confirm that
the resonant point is too low before
Don,
Interesting that one never knows just how the quoted inductance is
determined.
Do you have any idea just how the Elecraft quoted inductances are
determined?
If measured, what frequency and test jig.
If based upon calculations, how much as built variation will there be.
Have had the
Question: What band is selected when the Radio=BCD and the inputs are
open?
It appears to revert to RF sensing.
The situation is this. Antenna switching stuff automatically echos the
band BCD data to the KPA-500. The exception is if one manually selects
an antenna. In that case power to
? Ideally I would think the antenna switching would
only listen in on the K3 BCD outputs and react accordingly, but you may
have implemented something more complex.
73,
Don W3FPR
On 1/5/2013 8:34 AM, Brian Alsop wrote:
Question: What band is selected when the Radio=BCD and the inputs
are open
This has happened enough to raise it as an issue.
I have a SDR on the subrx IF. I operate mostly CW. The SDR is set so
that frequencies agree at zero beat on CW. A/B VFO's are linked for
normal everyday operation. I use ROCKY for everyday use and SKIMMER for
contests.
If I change mode
Sounds like the 4:1 balun may be overheating on 12M. Chances are if
you've been doing this for a bit, it's ruined. Heat anneals the core
and changes it's electrical properties for the worse. Heat may have
cracked it.
Now whether a 4:1 balun is the thing to use is another issue.
You don't
baluns-- although
this isn't the case here.
73 de Brian/K3KO
On 1/9/2013 17:26, David Gilbert wrote:
If that balun had overheated and become ruined on 12m it almost
certainly would have affected other bands as well. A ruined balun is a
changed balun.
Dave AB7E
On 1/9/2013 7:26 AM, Brian
SWR is a pretty coarse indication of interaction. Interactions can
change directional antenna F/B and F/S ratio by 6-10 db easily (assuming
you have it in the first place) and hardly affect SWR.
At least, this is my experience from antenna modeling.
However, we have to live with the hands
Except you can't change fonts in XP. It just ignores changes you try to
make. This has gone on for years and apparently there is no motivation
to fix it.
73 de Brian/K3KO
On 7/10/2013 16:45, Jim Brown wrote:
On 7/10/2013 9:04 AM, Richard Fjeld wrote:
I have been looking for a decent email
Anybody install with with the subrx in place?
My recollection is that the installing the screw with the lockwasher on
the panel side of the master oscillator PCB was a bit tricky.
Also the extra hole for the SMA connector is already in use here for
something else.
I'm wondering if there is
Thanks guys for the suggestions.
To appreciate the problem one needs to look at Fig's 7 and 9 in the
K3EXREF manual. There is no room for tools. Nor do I think any kind of
gop is a good idea. (Though if this screw were necessary for grounding
I don't think they would have used a split
I second the grounding strap problem.
Through heat cycling or whatever, the ground nut of the back of my K3
became loose. Had a series of weird problems with power. Tightened it
up and the problems went away.
There is also the possibility that the cable between your K3 and the amp
is
One has to be careful with these headers. There apparently are two
pinouts for them. One is used more often in EU and the other in the US.
So make sure you read the documentation supplied with the motherboard to
assure you connect the right type of cable.
I got caught with this problem while
Steve,
What would you be willing to pay?
What would it have that current import units do not?
(perhaps a manual you can understand or a set of controls that easily
access the gazillion features?)
Let's face it the current crop of 2m/440 are almost priced to be
disposables. What market
I'd say the knobs will get in the way when trying to hang it on your
belt. It would need some kind of box to protect knobs/buttons and the
display.
Oh is it waterproof or does it float?
73 de Brian/K3KO
On 8/19/2013 22:19, Mel Farrer wrote:
I think, darn I hate that, that the correct
I was hoping that we would truly have a two RX K3-- each with its own
set of bandpass filters when configured as independent.
Perhaps the space where the general coverage filters are now could be
utilized for a second set of filters for the sub receiver.
If I want general coverage, I'll get
Look at the LOTW Home page. Yaesu is emblazoned on the top half.
73 de Brian/K3KO
On 8/20/2013 19:39, Jim Lowman wrote:
I asked someone at ARRL HQ, and was told that much of the equipment has
been donated by the respective manufacturers.
73 de Jim - AD6CW
On 8/16/2013 4:30 AM, Mike wrote:
Interesting. My measurements up to S9+40 show it pretty linear with a
slope of 1.001 db/SMH unit. I didn't go above this. I'll send you the
curve.
The generator used is an HP8657B. This was done with a 400 Hz filter in
the CW mode.
73 de Brian/K3KO
On 8/21/2013 23:19,
Actually you ought to start with the DSP first. IF NB is a last resort
because it can generate trash when a strong signal shows up outside the
passband.
73 de Brian/K3KO
On 9/5/2013 23:39, Cady, Fred wrote:
_I have a pretty high line noise problem here on six meters and the NR doesn't
make
Just for curiosity, what is the purpose of this Elecraft net?
Is any technical information exchanged?
73 de Brian/K3KO
On 9/15/2013 13:07, Charlie T, K3ICH wrote:
I know it would take a few more net control volunteers, but the Collins
Collectors Association net on 14.263, Sundays at 2000Z
Joe,
There easy work around to this-- like adding a series resistor between
AF output and earphones. Some earphones have built in volume controls.
I use the non-fixed output of the K3 all the time for RTTY receive.
Having some control over the audio into the decoder is sometimes an
Dale,
I agree.
Autotuners for many of us who do frequent fast search and pounce can
indeed slow things up. The last thing you want when trying to pounce on
a rare one (before the mob arrives) is to have the amp off line-- even
for half a second.
The best tuner is none.
A bunch of fixed
A lot of the need for a tuner here would vanish if the KPA500 could
handle a 2.5:1 SWR. Phone-CW band excursions could be tolerated
without exceeding that limit. I've looked at the voltages and currents
involved. At 500 watts, they don't intractable.
I wonder if the incremental cost would
What if one defined the IF of the P3 to be at some PSK frequency and
connect a loop of wire to it's RF input? Put the loop on the desk.
There might not be enough resolution to clearly see anything but gross
PSK signal infidelities.
73 de Brian/K3KO
On 9/24/2013 16:40, Edward R Cole
I wonder if someone who has significant WSJT-X experience would like to
pontificate of the real benefit of squeezing out another KHz of
bandwidth out?
It seems to me on HF one is simply inviting in more signals which can
potentially de-sense the RX. That wipes out the benefit of the weak
Guys,
There has been quite a bit of discussion about use of very wide filters
for HF narrow signal mode operation here recently. If QRM gets to be a
problem the fallback position is to narrow the filter.
Keep in mind the following. The AF pitch you will get for a fixed
frequency signal is
Hi John,
I read that article too. Personally I think it is a lot of bunk. It
assumes perfect hearing.
Where ones sweet spot is depends upon his hearing and hearing
degradation. The closest pitch to 432 Hz is 429.97 Hz on my K3.
Some people's sweet spot may be 700 Hz-- since 432 Hz may be
Can be bypass mode be programmed into the KAT-500 on a segment basis?
I would only need the KAT-500 for the upper parts of the phone bands.
Rather than having to remember to turn off/on the KAT-500 when moving
up/down, I'd rather have it automatically remember. Ditto bypassing
itself
Guys,
I thought he said RX antenna input. The COR is on the aux ant input.
There is no COR on the RX antenna input (it's not needed, I think.)
73 de Brian/K3KO
On 11/13/2013 22:28, Mike K2MK wrote:
Hi Steve,
It is separated by a relay but that doesn't mean that you can't damage
internal
input.
See pages 41 through 44.
73,
Don W3FPR
On 11/13/2013 5:43 PM, Brian Alsop wrote:
Guys,
I thought he said RX antenna input. The COR is on the aux ant input.
There is no COR on the RX antenna input (it's not needed, I think.)
73 de Brian/K3KO
W3FPR
On 11/13/2013 6:29 PM, Brian Alsop wrote:
Hi Don,
Correct me if I am wrong.
The back panel diagram of the K3 shows two BNC's labed RX antenna. I
thought the thread originator was referring to this input path for a
RX antenna. It's what I use for RX antenna input.
I see spark gaps
Charlie,
Your information about BNC pin size diameter used to be true but not so
anymore.
These days the BNC center pin size is the same for 50 and 75 ohms.
The quote below is from 2004 so this change took place a long time ago.
See:
These have been displaced by newer gear.
Assembled and fully functional.
Make reasonable offer.
73 de Brian/K3KO
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I was using the K3 today. The VOX kept cycling to transmit and back
with no voice input.
Sounded like an easy problem to fix. Just touch up the antivox.
Nope.
Listening in the monitor, there is a rushing sound with clicking (like
fans in the background or something with a superimposed
transmit tones.
73 de Brian/K3KO
On 12/25/2013 17:28, Brian Alsop wrote:
I was using the K3 today. The VOX kept cycling to transmit and back
with no voice input.
Sounded like an easy problem to fix. Just touch up the antivox.
Nope.
Listening in the monitor, there is a rushing sound
Brian/K3KO
Original Message
Subject: Weird K3 SSB problems fixed
Date: Wed, 25 Dec 2013 19:27:10 +
From: Brian Alsop als...@nc.rr.com
To: elecraft@mailman.qth.net
Thanks to tips from several people of the list this problem was solved.
It turns out that a scope showed
On 3/14/2011 14:25, Mike Rodgers wrote:
I was working so didn't get to be on the net. Was that 20-60db qrm the same
guy from last week or was he in QSO on a too close frequency. I'm hoping it
was not the same guy because if so he will likely not go away.
73
Mike R
There is another
Those with DVK's should make sure the key beep option is turned off
while recording.
The key beeps can get into the recording.
Not nice.
73 de Brian/K3KO
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Guys,
I've tried searching everywhere I can think of.
Manuals seem to have evaporated.
Even tried posting to the TEK forums.
No answer on how to calibrate the master oscillator in a TEKTRONIX CFC250.
Anybody out there with this knowledge?
Even a partial schematic of the area of interest would
http://www.160m.de/9N7AN/
Until April 8
So far they has 4000+ QSO's including me! (Apparently good ears.)
73 de Brian/K3KO
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On 4/8/2011 06:51, Jim Brown wrote:
On 4/7/2011 6:18 PM, Johnny Siu wrote:
IMHO, ATU is nearly a must.
That depends a lot on your style of operating, your antennas, your
budget, and how much power you are willing to give away in the antenna
tuner. ARRL lab tests have shown that some antenna
On 4/9/2011 15:23, John Ragle wrote:
WOULD NOTS:
I definitely WOULD NOT choose the KPA500. 500 watts is just too much
for HF, unless one only operates SSB or AM.
I don't think the majority of contesters and DXer K3 owners agree with you.
73 de Brian/K3KO
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Even more basic, why would a DXpedition want to bring a P3 along? Extra
box, weight, cables and no benefit.
73 de Brian/K3KO
On 4/25/2011 12:37, Bill W4ZV wrote:
Gary Gregory-2 wrote:
Certainly there are ways to use the K3 with a simple connection to a PC
but
when you are operating in a
You're going to do this while running a pileup 1000 callers deep?
DXpeditions exist to make QSO's, not watch TV.
If a DXpedition is having trouble making QSO's, a P3 isn't the answer.
Improving their antenna(s) and being aware of propagation most likely is.
73 DE Brian/K3KO
On 4/26/2011
Roger,
You should see the crummy DC waveforms put out by typical laptop
switching supplies. I bought a bunch at a recent hamfest. Put each one
on a 'scope to observe the output. One had a 0.5 volt sawtooth
superimposed over the DC value. Another have ringing with introducing a
swing of
Guys,
I've been playing around with the link VFO command.
K3 has a subrx. Subrx was on.
It works but not as expected.
If the VFO's are linked tuning A also tunes B.
However, the following doesn't happen:
1) Tuning VFO B does not tune A
2) A spot sent to VFO B doesn't also change VFO A to the
I'm posting this for KK4AOA. He will be joining the group later.
He is doing a clean build.
The K3 is a K3-10 so far with an internal antenna tuner and five
filters. No subrx.
Running the utility program transmit power calibration works fine on
160,80 and 60M but fails on 40M.
Over the
The owner called Elecraft support.
They told him to tighten up the three screws on the bottom plate having
lock washers.
Voila, it works.
How did they know that? Incredible.
73 de Brian/K3KO
On 5/27/2011 00:05, Brian Alsop wrote:
I'm posting this for KK4AOA. He will be joining the group
On 5/29/2011 13:43, drewko wrote:
If I use a 50uv signal generator to set the filter gains for equal
readings on my K3's AFV meter I arrive at the following compensations:
2.70 KHz = 0db
500 Hz = 4 db
250 Hz = 8 db
This is way more aggressive than the suggested amounts but these
figures
On 5/29/2011 13:43, drewko wrote:
If I use a 50uv signal generator to set the filter gains for equal
readings on my K3's AFV meter I arrive at the following compensations:
2.70 KHz = 0db
500 Hz = 4 db
250 Hz = 8 db
This is way more aggressive than the suggested amounts but these
figures
in the 200 Hz filter here. But some have said
this procedure sets the gain of the stage before the filters. So why
specify a filter width setting? What is monitored during the RF gain
adjustment process?
73 de Brian/K3KO
On 5/29/2011 14:02, Brian Alsop wrote:
On 5/29/2011 13:43, drewko wrote
I'd be for a narrow side docking station that gets all the connectors
out the back. Maybe it can do dual duty and serve to mount the unit
upright instead of laying on it's back.
With all cables in place, it resembles an octopus that would be hard to
integrate into a fixed station.
73 de
Don't you guys think that if these EMP events happen one will have other
bigger issues to worry about than what happened to a ham radio? It
might not matter at all because you and perhaps the entire city you live
in may be dead.
73 de Brian/K3KO
On 6/1/2011 08:24, Bob DeHaney wrote:
Google
The lesson is:
If you change menu items related to K3 calibration settings, reboot the K3.
Here's what embarrassed me.
A local recently licensed ham brought his newly built K3-100 over for
some final tuneups.
We checked the various earlier calibrations done and then went to the RF
gain
I guess I'm just a Missouri mule. However, I see that most of these
posting praising the KPA500 and the posters don't even have one.
Wouldn't logic say, you can't make a comparison without having the items
you're comparing?
BTW in the 500 vs 1500 watt debate, there is a tool which can pretty
Wayne,
Please make this retroactive to June 2008. I went through the K3
assembly and operator's manuals at least a dozen times while waiting for
the K3 to ship. I'm sure others did the same.
This rehearsal, mental assembly, helped lots when the kit showed.
Also helpful was following the
On the other hand, the 1.8 KHz filter is my primary filter for SSB
receive. I'm mostly a CW operator and when I get on SSB it is only for
working DX or a contest. Fidelity is not an need. Once the high
cut/lot cuts are set up for the 1.8, one can easily widen the the filter
width with
What would be nice is a detachable P3 display. Just mount the LCD
portion anywhere you want. This would help us desk space challenged
guys lots. The guts of the P3 could also then be taken off the desk top.
73 de Brian/K3KO
On 1/14/2012 21:59, Joe Subich, W4TV wrote:
John,
The P3 does
It's been stated here that the difference between 1500W and 500W is
mostly unimportant. Most views are going from about 100 w to 500 W.
Here is another view based up the past 15 days of operation with a
KPA-500. The previously 1500 watts was used with identical antennas.
I chase DX and
Very interesting article. .18 Watts (frequency unspecified) + can't
be deactivated If one finds the antenna, won't tin foil work?
I can see lots of future postings on how to zap/deactive these transmitters.
73 de Brian/K3KO
On 1/20/2012 21:03, David Christ wrote:
My sister forwarded this
Like all things too good to be true, this posting about the KPA500 is a
bit unbelievable. Like cars, YMMV.
My experience with the KPA500 is much different. I suspect Jack only
operates SSB.
On CW expect the fan to come on after a few transmissions in under 30
seconds. Levels 1, 2 and
Wouldn't it be nice to have a reduced version of this which is a single
power on/off button. Such a small window could be located just about
anywhere on the PC desktop. The KPA-500 could then be remoted and not
use desk space.
73 de Brian/K3KO
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Anybody have any ideas on how to remove the bolt and nut holding the
power toroid without removing the toroid? Then once out, how to put the
bolt and nut back?
73 de Brian/K3KO
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To take this a step further. Why not consolidate all the different gear
firmware programs into a single program? First screen would be to
select the device.
73 de Brian/K3KO
On 2/2/2012 22:03, LA8AW wrote:
My wish is a stand alone program that do --all-- the menu
settings/configurations in
As you say your are a casual CW operator. Perhaps some feedback from a
nearly 100% CW operator of 50+ years would be useful too.
1) Tuning 400 Hz
2) When things get tough 200 or 250 Hz. The utility of the 200 Hz
signal has been especially good for pulling out really weak ones on 15-6M.
3)
Who is the referee determining the channel is empty? Propagation being
what it is, two stations may have QSO's going on and none of the group
of 4 thinks hears the other pair. Another observer might hear both
QSO's at the same time. Thus a violation has occurred.
There is no avoiding
Guys,
I'm also curious about this-- especially what's going on on 15M.
My values at 500 W out into a dummy load are:
(amp), [volts], {efficiency}
1.8MHz DC (11.5) [63.1] {70}
3.5MHz (11.2) [63.5] {71}
7MHz(12.2) [62.5] {67}
10.1MHz (not measured)
14MHz (13.4)[61.8]
Guys,
On the other hand, there nothing wrong with trying to characterize the
beastie you have as best you can. If for no other reason to see if
something changes with time and how much.
Also, how does my kit comparing to other kits which presumable have
similar but not identical
Assembled.
K3KO/Brian
Henderson,NC
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Elecraft mailing list
Home:
The mobo I had also had an LPT port pin connector on board. The only
difficulty was that it was a non-standard sized connector and the pin
numbers had different functions than usual LPT connectors.
Also keep in mind there are at least two standards for the pin
numberings on the onboard mobo
Don,
It isn't the 8ms that is relevant, it is how the K3's coding behaves in
subsequent CW characters when the TXDLY is varied from 8 -20 ms. PTT
is irrelevant.
Higher values produce QSD regardless of how the amp is keyed. It occurs
regardless if one is using the K3's internal keyer or an
Why are contests so popular? Think of three factors:
1) Competition and station performance testing.
2) Weekends are the only time may people get to operate much. The
desire is to make a lot of contacts.
3) Rag chewing in the everyday world has gone the way of speeches vs
tweets. So short
It isn't a signal report. It is really a place holder to let your brain
know that what follows you have to copy. Even digital systems have a
wake up stupid function.
73 de Brian/K3KO
On 2/20/2012 16:42, Matthew Pitts wrote:
Why be upset with a 599? Because of that very same variability; it
For those who don't believe Dave, here is some suggested reading material.
N6BT's new Antenna Book, Array of Light
He discusses the significant difference an extra 2db makes.
Yes he also sells antennas, but what he says rings true.
73 de Brian/K3KO
On 2/22/2012 07:54, David Gilbert wrote:
You are of course aware that the ARRL SSB DX contest is going on til
2359Z tomorrow. Expect QRM.
73 de Brian/K3KO
On 3/3/2012 23:02, Phillip Shepard wrote:
The weekly Elecraft SSB net will meet tomorrow (3/4/12) at 1800Z on 14.3035
MHz +/- QRM. I will be net control from western Oregon,
I wonder if anybody else is observing this.
The first few CW characters do not develop full power as indicated by
the LED power displays.
My gut feeling is that LED power displays should be fast enough to
capture the true power for even the first couple characters.
Switching to the PK HOLD
CWT is not working as well in 4.61 either. It doesn't hit zero beat
within 4 Hz. It used to be spot on. This observation was made and
posted here when 4.61 came out.
73 de Brian/K3KO
On 1/16/2013 18:36, Chad Wasinger wrote:
Has anyone experienced any issues with not decoding a good cw
Now if we only had some decent labels to stick on those 10 switches
Conventional computer labels seem to last a couple weeks before peeling
off. Tiny writing isn't my strength so they are cryptic and only
marginally readable. M1-M4 require diagonal printing.
The other criterion is they have
Larry,
Is this antenna different from other bands or has it band specific
components?
It sounds like a set of dirty relay contacts or a bad joint. I've had
this on a few antenna switches. The xmit voltage is enough to punch
through but microvolts aren't.
73 de Brian/K3KO
On 1/24/2013
Hmm, wouldn't the DSP filter be good enough for this purpose?
Except for obnoxious PACTOR, there are generally not the 40db over S9
signals to reject.
73 de Brian/K3KO
On 1/27/2013 14:17, KD8NNU wrote:
I use mine for digital modes. There are times where a 500 hz could be
too narrow.
Let me know if you have one available and shipped price.
73 de Brian/K3KO
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No virus found in this message.
Checked by AVG - www.avg.com
Version: 2012.0.2221 / Virus Database: 2639/5568 - Release Date: 01/30/13
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Elecraft
Guys,
Maybe this has come up before. It is now obvious that the K3 firmware
program will not work on a virtual serial port (LPBRIDGE). Tried.
For curiosity, why is that?
73 de Brian/K3KO
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No virus found in this message.
Checked by AVG - www.avg.com
Version: 2012.0.2238 / Virus
Ariel,
Please explain to me how your SWR measurements translate to ERP.
There are a whole bunch of things potentially between your rig and the
antenna. Then of course there is antenna pattern.
I once had a summer job at Airborne Instruments Labs. Part of the
summer trainee job was to
On 2/26/2013 20:13, Rick Bates wrote:
It isn't.
One needs a 3 amp 18vac AC wall wart, diodes, a few caps an LT1803
adjustable regulator and a few resistors.
The use of an AC wall wart eliminates any switching supply concerns.
73 de Brian/K3KO
It shouldn't be difficult to build a small,
Frank,
Yes the standard TXCO is good enough for JT65. It is also good enough
for WSPR which is even more picky.
Last test I did of drift was at 24.9 MHz. The K3 (standard TXCO)
drifted 3Hz/hr (after a 6 hours of warmup) relative to my Rb standard.
Expect more if you just turn K3 on and
This illustrates why the K3 needs more programmable buttons.
I programmed this function on M2 button since I never need memories.
The unlink is done the programmed M4 button--in conjunction with unsplit.
I use this a lot.
73 de Brian/K3KO
On 3/4/2013 14:58, LA8AW wrote:
Today it happened
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