Hi all,
Members of Sands contest group are again joining up with Workington Radio
Club and Brendan Minish, EI6IZ for a week of fun and DX on the Isle of Arran
next week. We arrive on the island on Saturday 18th and depart the
following Saturday. We will not be fully set up on the Saturday of
Don,
I'm using a Softrock IF kit (plus Z1B buffer amp) as a panadapter with a
~£275 Samsung NC10 netbook. Initially I was surprised but it works well with
the internal Realtek HD soundcard.
It runs LP Bridge, PowerSDR/IF and N1MM or Logger23 smoothly; with an extra
LCD monitor this gives
Pat,
I cannot find the schematic of the HF Packer amp to verify this, but my
suspicion is that the input impedance of the amp might be changing with the
level of drive signal. This change will occur rapidly of course in the case
of SSB.
If this is the case then distortion could result either
Hi,
I have been using LP-PAN for a couple of years. In spite of not owning a P3
I think I know enough about its capabilities to comment about the
comparison. The P3 definitely has better sensitivity. LP-PAN is currently
quite poor in that respect, but Larry is working (feverishly I hope) to
Bill,
I can tell you that just last night, on 160 meters, I copied 2 very weak
stations perfectly Q5 that did not show on the P3 waterfall. Now, Its
entirely possible its my adjustment skills but I dont think so. Yes..the K3
IF Mod was factory installed. This has happened more than
One can use JAVORNIK, transverter with 2 RX...
http://lea.hamradio.si/~s53ww/xvrt/xvrt.htm
http://lea.hamradio.si/~s53rm/JAVORNIK%20144.htm
73' 7S7V
Message: 3
Date: Mon, 13 Sep 2010 09:09:01 -0800
From: Edward R. Cole kl...@acsalaska.net
Subject: [Elecraft] two 2m-Transverters for diversity
HI ALL
Just installed version 4.05 in my K3 to run my P3 as well
I always used the microkeyer at 4800 baud from the K3, but I'm not able anymore
to set any other speed in the K3 as 38400. Yes I can change it, but the radio
does not store it when I leave the menu. And I just can't get it to work
Dick, try this to set your speed to 4800:
Start the K3 Utility.
On the Port tab, press Test communications. The K3 Utility should find
the radio at any of the supported speeds.
Go to the command tester tab. Type BR0; (including the semicolon, but not
the quotes) to choose 4800 bps.
Go to the
Dave,
Bring up the mixer (volume control) and you can switch between the sound cards
under
OptionsPropertiesMixer Devices. Mute one and see if it works for the device
you
want it to.
Round about, but should work. I think Windows will list them in the order they
were
installed.
73, Mike
So now my micro keyer is not reading the Radio
any solutions?
The P3 forces the K3 to 38,400 bps whenever it is turned on.
You set the baud rate for the P3 - computer (including the
microKEYER) link using the RS-232 menu item in the P3.
Tap the P3 MENU button
rotate the encoder until RS232
Did you contact Virgil about this? He has always been very helpful
with the Packer amp and related problems.
John
K2QY
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Hi Pat and group,
FWIW, I have just built an HF Packer Amp and have exactly the same problem with
marked audio distortion on SSB when driving it with my FT 817nd. Maybe the
problem isn't the K2?
I have discovered others with the same problem, but no-one with a solution to
this Amp's non-linear
Awaiting Elecraft support answer at this point. Thanks for help so far.
Dan NM3A
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I didn't read your note carefully enough.
As W4TV correctly points out, the P3 to K3 speed is always 38400. The PC to
P3 speed can be set to 4800 using the P3 front panel or the BR command.
Dick, K6KR
-Original Message-
From: elecraft-boun...@mailman.qth.net
Thanks Joe and Dick
All working agn
73 de Dick
- Original Message -
From: Dick Dievendorff die...@comcast.net
To: 'Dick Dievendorff' die...@comcast.net; 'Dick Grolleman'
groll...@planet.nl; elecraft@mailman.qth.net
Sent: Tuesday, September 14, 2010 4:11 PM
Subject: RE: [Elecraft]
And, I'm sure the P3 communicates with the K3 for a reason. Why would you
want to communicate at a lower speed, anyway?
Dan -- N3ND
-Original Message-
From: Dick Dievendorff die...@comcast.net
To: 'Dick Dievendorff' die...@comcast.net; 'Dick Grolleman'
groll...@planet.nl;
Hi all,
I'm new to the list, having just purchased a K3. Still need to put some
antennas up to try it out. Soon...
Anyway, to the point of my post:
Due to the large number of posts to this list, I read it on the qth.net web
site in archives, rather than directly in email. Qth.net archives
Another good way is to use nabble.
http://elecraft.365791.n2.nabble.com/
73m
John n1JM
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$15.00 shipped. E-mail off list. Geo
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Hello,
I have a K1 (#1919) with the 4-band filter board and Internal Tuner options.
Finished it up about a year ago and have been
using it sporadically with moderate success since. For some reason (most
likely builder error) yhe output power has never
been quite right and so recently I thought
That sounds like the amp is not running linear. First make sure the
bias is set correctly.
Then do a test in CW mode -
Put a small amount of drive to the amp (measure it), and measure the
output. Compute the gain.
Increase the drive by a small amount, and again compute the gain.
Continue in
Larry...
Your rejoinder to Bill doesn't specify mode, so I am assuming CW.
I don't use either P3 or L-PAN yet, but I do use the similar
visual-signal part of fldigi. A PSK or RTTY signal has an idle signal
which will average to a visible signal if you are using some degree of
fft
If the input impedance of the amplifier is changing with drive level,
that can be cured with an attenuator at the input - the driver will
then see a more constant impedance.
The schematic in the HF Packer amplifier manual shows different input
attenuators for the K3 (3 db), FT-817 (4 dB)
Don Wilhelm said the following at 09/13/2010 07:57 PM :
First turn the compression to zero, then increase the mic gain until you
see 6 to 7 bars on the ALC meter.
Than add compression as you like.
You can do all that in TEST mode. When adding compression, you can
listen to yourself on
Thanks Allen
who would have thought to check the help files HAR
all my questions are answered
mia culpa
thought I saw someone looking for a K3 filter ? I have the 5 pole ssb
filter that
was the original one before I upgraded
if interested reply off list, be good to find it a home
Bob
Check your soundcard. This report pops up occasionally and the
user has a microphone/VoIP headset plugged into the mic input of
the soundcard. Windows will automatically select the mic input
of a soundcard if it detects a mic connected (or the built-in mic
in many laptops).
When this happens,
Doc,
What external PEP power meter are you using? Is it possible you have it set
to read average power vs. peak power?
Chuck, AE4CW
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Don,
Shortly after I sent my comment earlier today I received an email telling me
that the HF Packer amp was intended to be used for CW (Class C?) not SSB,
and that a modification was necessary for its use as a linear amplifier for
SSB - presumably at least a change in the amplifier's standing
You need an oscilloscope.
--- On Tue, 9/14/10, D. R. Evans doc.ev...@gmail.com wrote:
From: D. R. Evans doc.ev...@gmail.com
Subject: Re: [Elecraft] Settings for CM500 on K3?
To: Elecraft@mailman.qth.net
Date: Tuesday, September 14, 2010, 9:20 AM
Don Wilhelm said the following at
09/13/2010
Hi Larry all; I have not used Lp Pan so I cannot really make a comparison,
but I have found that if the P3 ref level is set really low just at the noise
level and if the span is set to narrow amounts that indeed very low level sigs
can be seen. For example I hve been seeing the 20 meter
Corrections: beacons at 14100 Mhz, not 14000 Mhz,,,Steve W6HPK
- Original Message -
From: shwha...@comcast.net
To: Larry K1UO k...@uninet.net
Cc: elecraft@mailman.qth.net
Sent: Tue, 14 Sep 2010 16:22:46 - (UTC)
Subject: Re: [Elecraft] LP Pan versus P3 Panadapters
Hi Larry all; I
Hi Don and Geoffrey,
The manual doesn't discuss biasing the amp for Class C, just for
linear operation. This is a 2nd Gen amp with only a single-turn pot
for bias adjustment which makes the adjustment tricky but doable (3rd
Gen has a ten-turn pot) but I'm pretty sure I set the bias correctly
Hello all -- K0AWU here
I am reading this thread with great interest. I apologize to those that have
seen similar messages from me on this subject in the past. I had SO HOPED that
with such a large number of P3s now in the field I would have seen reports on
weak sig detection from some of
S/N 4335 (so I'm new) with KVX3 installed. I like to switch between two
antennas when checking the HF beacons or even before calling someone to help
determine if one antenna better than another. I'm mostly doing this with my
end fed antenna into the T1 auto tuner and a 25-foot vertical mast fed
Hi Larry,
It depends on the span. Unlike some other panadapters, the P3
automatically reduces the sample rate as you narrow the span, which
improves the sensitivity.
For example, I have my HP8656B signal generator set to 3640 kHz with the
amplitude as low as it will go (-127 dBm). The K3 has
It strikes me, when implementing algorithms to compute Periodograms using
DFT/FFTs, there are tradeoffs in variance and spectral resolution. There are a
number of factors, including window/FFT length, window function, amount of
window overlap, degree of zero-padding, number of estimates to
On Tue, 14 Sep 2010 09:07:06 -0700 (PDT), Wes Stewart wrote:
You need an oscilloscope.
Yes. Let me offer an explanation of what I think might be going on
with your PEP meter. First, ANY meter circuit, digital or analog, will
have some time constant, so there will be SOME averaging. I have a
On Mon, 13 Sep 2010 13:13:53 -1000, David Herring wrote:
I'd like to know how one would properly bond equipment (I guess for DC and
audio purposes) AND RF ground the same equipment at the same time.
Study my posts. That's the right way to do it, and that's why I spent the
time going through
For some reason that goes against what I think many are looking for in the
P3, if one has to narrow the span to 2khz, then I see no use for the P3
at all, I need
to see what is on the band at -127DBm at 30 to 50khz or more span. If
the signal is
only seen at 2KHZ, I can hear that by ear and
I recently acquired a very slightly used CM500 from a fellow ham who couldn't
use it because the tight ear seals made his hearing aids squeal.
I've found it to be a very comfortable headset to use (wore it for many hours
during last weekend's VHF contest) and after setting up the mike as
Good posting using quantitative reasoning not just qualitative
anecdotes. Provides a way for others to tailor it to their own
particular situation. It also cites references. This I think is a
model post.
David K0LUM
The Wikipedia entry on Voice Frequency states: The voiced speech
of a
I just re-checked my K3, and I am set to MENU/MIC SEL=rP.l biAS, MIC Gain
knob is 17, CMP is 22. I have the first 3 sliders in the TX EQUAL most of
the way down (-12 to -16) and the top 2 up maybe +3.
When I had an external LDG tuner with an analog meter, it would read low
output, but when I
No I didn't have to narrow the span to 2 kHz to see the -127 dBm signal.
Anything less than about 30 kHz was sufficient.
Also, remember I had the K3 preamp off and the attenuator on. With the
attenuator off, the -127 dBm signal is visible all the way up to 200 kHz
span.
With the K3 preamp
Joe,
Thank you for your insight. Audio coupling to the microphone was INDEED the
culprit. Turns out the input line on the notebook was bad and needed
repairs. I also needed to turn off the microphone to make sure it does not
interfere. Actually was the Laptop's own mic picking it up, not
Hi Alan,
Ill admit I didnt try a narrower span and I normally use the +-15Khz
setting (30Khz span) on the 160 meter cw band. Ill try narrowing it up and
see if it picks up the very weak signals but I dont want to operate on a too
narrow span or, as they say, it becomes much less useful to
It's not possible to really know how you sound to others listening to your
own voice as you speak, no matter what kind of phones you use. Much of the
sound we hear when we speak arrives at our ears through the estuation tubes
connecting our sinuses with our ears and through bone conduction in our
Alan, thanks for the explanation, sounds like there is some other
problem then
if people are not seeing the weak signals that they can hear.
Will hook up the P3 here shortly and see what mine does. If you can see
-127DBm
at 30 KHZ it sounds fine to me.
73 Merv K9FD / KH7C
No I didn't
I guess I made my first submission under this subject too verbose.
The message with regard to weak signals is very simple:
Coherent signal averaging techniques do not work well on incoherent
signals. Period.
John Ragle -- W1ZI
__
P3: s/n 464 Firmware 00.32 Rcvd 9/14/10
K3: s/n 4521Firmware 4.10 Rcvd 8/2/10
I have an old logging program that I do not want to lose or have to change.
My first problem, because this program is so old (YPlog) was solved by
selecting a Kenwood TS570D as
John,
That makes good sense. Also note that the P3 increases the resolution
as the span is narrowed, and that makes the signals more coherent.
73,
Don W3FPR
On 9/14/2010 5:52 PM, John Ragle wrote:
I guess I made my first submission under this subject too verbose.
The message with
Agreed, your voice over the air and through somebody else's radio will not
sound the same as what you hear in your own headphones. But wouldn't you agree
that what you hear in your headphones in Test mode will be sufficient to tell
you if your audio is badly overdriven and clipped, weak,
Lew,
You could make a recording of the monitor output from the K3 and
determine for yourself if it sounds good or bad. I would suggest that
is better than reports from others who are not familiar with your
voice. If you are not familiar with how your own voice sounds, then ask
the XYL or
I agree with both of you on this. I thought the discussion was about
optimizing the audio. Self-listening will disclose severe distortion,
clipping, extreme over compression, etc.
Most Hams these days have a computer around the rig. I record a bit of my
transmitted audio on mine to evaluate a
On page 13 of the P3 Owner's Manual, in the section 'RS232 XCVR', the last
sentence states: The K3 baud rate is set automatically by the P3 and cannot
be changed at the K3 Based on that, is it correct that if I set the P3 baud
rate to 4800 b, then the K3 will be operating at 4800 b even though
The K3 operates at 38400 if a P3 is inline. The PC sees the P3's speed, which
can be 4800 thru 38400. Your PC software that requires any particular speed is
therefore supported. The P3 to K3 link is a high speed one for low latency.
Dick, K6KR
Sent from my iPhone
On Sep 14, 2010, at 5:07
When the P3 is in line, the baud rate that the logging program sees is
that of the P3, not the K3. If the logging program wants 4800 baud,
that needs to be set on the P3.
One way to look at it is that the P3 is pretending to be the K3. The
logging program thinks it is talking to the K3 at 4800
In other words, set the speed on the P3, not the K3.
73,
Don W3FPR
On 9/14/2010 8:18 PM, Dick Dievendorff wrote:
The K3 operates at 38400 if a P3 is inline. The PC sees the P3's speed, which
can be 4800 thru 38400. Your PC software that requires any particular speed
is therefore
It means that the P3 combination will interface to your computer at
4,800 bps if that is what you set it to on the P3.
The data rate on the RS232 private line between the P3 and the K3 is
set by the P3, and is currently 38,400 bps.
The K3 is in fact operating at the data rate indicated by
Thanks for the advice, but it is present, headphones or speaker.
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Thanks Lyle!
K1GQ/Bill just sent me an email that clarified my confusion; saying
basically that the P3 talks to the 'outside world' at whatever baud rate is
set on the P3, but the P3 and K3 communicate with each other at a fixed
38400 b rate! So between you and Bill, my confusion has been
I'd like to hear how P3 owners are programming the Function keys.
What are you programming and why?
73, Ken, K6LA / VY2TT
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Help:
One of these days I will find a use for the programmable keys.
Until then, mine are virgins.
Jeff Cochrane - VK4BOF
Innisfail, QLD, Australia
Elecraft K3# 4257
- Original Message -
From: Ken Widelitz
To: Elecraft@mailman.qth.net
Sent: Wednesday, September 15, 2010 11:11 AM
I keep my headphones plugged in the back all the time and use PF1 to turn
off the speaker when I want to use the phones.
George
WA1NTA
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ken Widelitz
Sent: Tuesday, September
Is there anything connected to the IF OUT connector on the P3? We've
had reports of the LO signal from, for example, an LP-PAN leaking into
the P3 via that path.
Alan N1AL
On Sun, 2010-09-12 at 11:24 -0700, K4SC wrote:
The subject is terse, so here is what is happening. I notice a very
Don - Allen - Dick!
Thanks very much for your information. As mentioned to Lyle, K1GQ answered
my question and cleared up my confusion. I appreciate your responses.
Thanks and 73,
Tom - W4BQF
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Lyle, KK7P, wrote:
If you turn the P3 off, then the K3 will be connected to your
computer through a bypass relay in the P3. You would then
need to either adjust the computer's data rate setting, or
the K3's, to match each other.
This is an unfortunate feature to have to change the K3 or
Ed,
I think you are misunderstanding. You would only have to change the
configuration IF you needed to have P3 set to 4800 baud or some other rate
than the default 38400. I use P3 and K3 at default rates and have no
problems at all, P3 on or off.
73,
Don, WB5HAK
Only if you are using a serial port rate slower than 38,400 bps. In
some future firmware rev of the P3 or K3, this could conceivably go away.
I realize some stations are set up to use a slower data rate. Unless
you have a software program that is not capable of operating with a
serial port
Same here Ed. I now know how to use my logging program at 4800b and then
N1MM Logger at 38400b. Very simple once you understand how it works.
73,
Tom - W4BQF
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Cunningham
Ron D'Eau Claire said the following at 09/14/2010 06:02 PM :
I agree with both of you on this. I thought the discussion was about
optimizing the audio.
The question I asked was about power output. There have been some helpful
replies and on off the reflector (and I have a plan of action now)
Don, WB5HAK, wrote:
I think you are misunderstanding. You would only have to
change the configuration IF you needed to have P3 set to 4800
baud or some other rate than the default 38400. I use P3 and
K3 at default rates and have no problems at all, P3 on or off.
I use 4800 baud in one of
Lyle,
I realize some stations are set up to use a slower data rate. Unless
you have a software program that is not capable of operating with a
serial port set to 38,400 bps, or have some other technical reason to
run slower,
Unfortunately there are a significant number of older
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