Joe Subich, W4TV wrote:
Absolutely not! When conventional rigs are generating ALC
their final amplifiers are ALREADY in compression and they
are generating IMD in the PSK31 signal.
A bit sweeping, Joe. Surely any sane engineer would put the onset of
system ALC at a level *before* the
Hello,
I'm not a specialist, but this very interesting discussion remember some
points
during my past professional activity.
I was employed in a society involved in the design and fabrication of
RF link for broadcast TV cameras. ( My job was limited to camera remote
control
via separate UHF
Hi all,
i will sell my K3 #1024. The following is installed: K3 100 Watt with the
following components:
Perhaps someone from Germany is interested to get a 3 month old K3 for
2300,- Euros plus shipping costs.
Contacts via mail to: dg1...@franz-hegener.de
Tel. 02971 87028
K3/100-F
Peter,
I don't read your message before sending my very long mine but i
totally agree with you!
I can imagine that digimodes software generate ± complex audio signals,
then we can
adjust this audio level to allow TX chain, including PA, to work in a
linear zone.
(I admit that we should be
Pete F5VNB wrote:
Joe Subich, W4TV wrote:
Absolutely not! When conventional rigs are generating ALC
their final amplifiers are ALREADY in compression and they
are generating IMD in the PSK31 signal.
A bit sweeping, Joe. Surely any sane engineer would put the onset of
system ALC at a
Peter Connors, F5VNB wrote:
Absolutely not! When conventional rigs are generating ALC
their final amplifiers are ALREADY in compression and they
are generating IMD in the PSK31 signal.
A bit sweeping, Joe. Surely any sane engineer would put the onset of
system ALC at a level *before* the PA
Hello,
On Jan 17, 2009 there will be a few hardy Polar Bear souls venturing
outdoors in the bitter cold to operate their QRP radios.
This could be considered as a warm up to the FYBO contest.
Please check out http://www.n3epa.org/Pages/PolarBear.htm for a complete of
legal Polar Bears.
Hi
Are you not satisfied with the radio?
Oms PY5EG
De: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] Em nome de Franz Hegener
Enviada em: Saturday, January 17, 2009 8:55 AM
Para: elecraft@mailman.qth.net
Assunto: [Elecraft] K3
DOUGLAS ZWIEBEL wrote:
Do you suggest that the base K3 be completed first and then the
subRX be installed, or should I do it all at once? Maybe the
official K3 advice is in the box.
Yes it's basically in the box but I agree with Al's excellent summary that
the manual should be
I've tried an MC-50 with my K3 but the output is very low compared to my MH-2
hand mike. Even with the mic gain up all the way it won't fully move the
ALC to max. Not sure why.
Terry Schieler wrote:
What about the Kenwood microphones, like the MC-60 or MC-80?
Werner,
I'm using a
The MC-50 at the 600 ohm setting is speced for -76 dBm output, while the
MH2 is in the range of -45 to -55 dBm - that means you will need 20 to
30 dB more mic gain with the MC-50 than with the MH2.
All microphones are not created equal, and do not have similar output
levels.
You should be able
I use a Kenwood MC60 with Mike gain at 10 with no problem!
73 de Bill N4ZI K3 sn #1059
--- On Sat, 1/17/09, Don Wilhelm w3...@embarqmail.com wrote:
From: Don Wilhelm w3...@embarqmail.com
Subject: Re: [Elecraft] Desktop microfone for the K3
To: NZ0T n...@cox.net
Cc:
Version 8.12.9 of N1MM Logger has just been released and is available
at http://pages.cthome.net/n1mm/
With this latest version, N1MM Logger now incorporates full support of
both K3 vfo's and receivers thanks to the programming efforts of K3CT
and the engineering efforts (CAT enhancements) of our
Ian White GM3SEK wrote:
A sane engineer surely would; but the huge majority of transceivers are
trying to use the ALC loop for too many different functions including
gain levelling between bands, peak limiting and also power control.
[snip]
I seem to have read this before -
list1 wrote:
Hi Bob and All,
I got home and did USB NCS duties tonite on MARS so I have a little more
information.
It seems that when I first start transmitting even at a MIC gain of 25, I
only initially get about 30 to 60 Watts of power out. If the Mic gain is
15
it is more like 35
Hi gang,
Coming home after the JW trip I thought it was a good time to do the
Elecraft recommended mods. After doing the mods, I lost the audio in my SUB
RX. It didn't happen right away, but after a few hours use. The mods I did
was;
- K3 AF OutPut Mod
- K3 AF OutPut Mod
- Improving the
The manual refers to C12- C22 etc as ,01uF (103) 5% 50V mono capacitors.
The ones supplied in the kit are labeled (DELTA sign) 103k and X7R50. Doesn't
the K suggest that these are actually 10% capacitors.
in this context, what does MONO mean?
Or am I missing something here?
73,
The manual does include the KDVR3. See errata F2, item 3, available on the
Elecraft WEB site here:
http://www.elecraft.com/manual/K3_Assembly_Manual_Errata_Rev_F-2.pdf
The instructions for installing the KRX3 as part of the basic build were
incorporated in the current manual (Ref F) last
Guys,
Has anybody installed the high stability oscillator after the subrx was
in place?
It appears that one may simply be able to unplug the old and plug in the
new.
73 de Brian/K3KO
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You
Yes. It's easy to reach even with the KRX3 module in place by unplugging the
TMP cables on the KREF3 board. Just be sure to put the TMP cables back
correctly as shown in the manual.
Ron AC7AC
-Original Message-
From: elecraft-boun...@mailman.qth.net
+If the filter response varies across the passband, which it does, the ALC
+will vary the amount of gain used to try to keep the RF level to the amount
+it is set at, whether the signal is being generated near the edge of the
+passband or at the center. This is important to the PSK31 operator who
Peter,
Surely any sane engineer would put the onset of system ALC
at a level *before* the PA goes into compression?
Not necessarily. Some incidental compression in the final
amplifier is not necessarily a bad thing for CW or SSB
systems. If the ALC is derived from something like grid
General release January 16, 2009:
http://www.zerobeat.net/mediawiki/index.php/Procat_Cool_for_Windows
And page down to bottom.
73, Don.
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
On Jan 17, 2009, at 1/173:00 AM, hb9ari wrote:
I can imagine that digimodes software generate ± complex audio
signals,
then we can adjust this audio level to allow TX chain, including
PA, to work in a
linear zone.
Out of the common HF digital modes, I believe that BPSK31 and
I think Joe may be thinking of how older radios used to work,
where the power control varied the gain of the TX stages and
ALC did only start to operate once the rated output of 100W
or whatever had been reached.
Older (tube) radios did not have power level controls. They
were operated
Joe Subich, W4TV wrote:
If you want to be able to click to tune
without manually adjusting power levels get a Flex-5000 or
a transmitter that uses on frequency RF generation.
Would a possible solution be 'split' operation using VFOA to 'read' an
ssb passband via the sound card while
The frequency is plus or minus the QRM. Note the
start time of 1000 hours to try and minimise
European QRM.
73 Dave, G4AON
K3/100, Acom 1000, dipole
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the
Julian, G4ILO wrote:
I seem to have read this before - perhaps in one of your RadCom
columns?
Yes; the first discussions were here, sometime around March 2008.
Then you saw it again in my May 2008 column in Radcom, although that
article was specifically about the deficiencies of normal
Note: when using Mike's software, AUTOINF must be set to NOR.
Anyone who normally has AUTOINF=1 (e.g. for a SteppIR antenna)
will need to manually reset it before using the software in
order to get usable data.
73,
... Joe, W4TV
-Original Message-
From:
Joe Subich, W4TV wrote:
Older (tube) radios did not have power level controls. They
were operated at their design power and ALC reduced the gain
to prevent overdriving the final amplifiers.
This is true.
I used to run PSK31 with a Kenwood TS-520. No power control on that rig
and the
I have been unable to send CW with my K2/100, HRD and DM-780. I get a COM1
port not available error message.
I have tested the COM1 port and it passes the diagnostics and works with other
programs (e.g. K2 Remote).
I do not run K2 Remote with DM-780.
I selected none on the RTS and CTS
I should've listed the power supply as a 10A continuous and 12A peak sorry.
Lack of nibbles, maybe my price is too high? This K3 is literally AS NEW but
I suppose considering the many alternative configurations of the K3, this
could make selling one used tricky unless it is sold at a heavily
Good Evening,
The last few days have been very, very nice. The temperature rose to 65
degrees yesterday and there has been full sun. The only way I know it is
January is to view the sun angle. Very strange for this time of year. I am
using this time to get ready for what I know must
33 matches
Mail list logo
