On Thu 26 Sep Rick Johnson wrote:
QRP puts the onus on the receiving station.
No problem transmitting 5W.
If you want to make contacts with a QRP station you need to pay a lot
more attention to your antenna. You will likely make things a bit easier
for the other end of the QSO if you push
Mike,
Yes, you must go to the K3 menu setting for PTT-KEY and set it to match
the setting in your software.
73,
Don W3FPR
On 9/27/2013 1:43 AM, Michael Eberle wrote:
What software are people using for the JT65 mode? I would like to
possibly start tinkering with JT65 and have WSJT9
I unask the first question (how to raise K2 output power). But in
self-defense,
I knew that:
PAs have better distortion properties with higher supply voltages
14-20W is about 1 dB but 10-20W is 3.01 dB (3 dB MATTERS!)
operating above 10W on ssb with the K2 was not a good idea
It doesn't have to work as a filter either! It just needs to give some
audio gain
and be cheap.
--
73 AllanK7GT
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Help:
You could always copy the preamp section of the KAF2 on a
small piece of .1 perf board and install it on the audio
filter headers. It would be all of one IC and half a dozen
leaded components. My guess is that you could do it all for
less than $20 even if you needed to buy all new parts at
It seems that a K2 is not the Radio for you and your intended purpose.
73 Milverton.
From: Allan Taylor k7gt...@gmail.com
To: Elecraft elecraft@mailman.qth.net
Sent: Friday, September 27, 2013 8:35 AM
Subject: [Elecraft] mods to K2
I unask the
The rat shack has the pana vise on in store close out for $19.97.
73
Mike R
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Hi all,
Is anyone using the latest version of the Heil Goldline mic with their K3? I
have to max out (60) the mic gain when I try to use the HC-5.1 narrow element.
I've tried both H and L settings with no bias in the menu. The wide element
works just fine with a mic gain of 30. I'm almost
My first thought on the audio was to get some efficient earbuds. Lightweight
and cheap.
Over on the KX3 list, people like the Chill Pill powered speakers.
I know it is a second box, but the Hardrock 50 amp has been getting good
reviews. You would not need to get it out except in an emergency,
It has worked so well that I haven't had the urge to make a new cable
to connect my SignaLink USB's keying output to the rig. YMMV
Signalink USB does not have a USB keying output - its PTT is derived
via VOX built into the device.
73,
... Joe, W4TV
On 9/27/2013 12:34 AM, Bill Frantz
Hi Mike,
WSJT-X is able to interface with DXLabs Commander and use CAT to key the
rig. Or you can use RTS/DTR (if you dont use DXLabs) but you must set
PTT-KEY accordingly.
Frank
KG6EYC
On Thu, Sep 26, 2013 at 10:43 PM, Michael Eberle mtebe...@mchsi.com wrote:
What software are people using
Quite true on HF.
3dB often matters doing weak signal work on 6 meters and up, and sometimes
on 10 meters, but on HF there are too many other variables, QSB, etc.
Back in the 30's and 40's the Radio Engineering texts used to list 6 dB as
the minimum change one might expect to detect by ear on
I think there is a lot of evidence that 3dB does not matter. 10dB
matters. 6dB might matter.
My thoughts on this are that if 3 dB mattered much, then QRP, down 13
dB from 100w and 23 dB from a KW, would not work at all, or at least
not often. But we all know that QRP does work.
Now . . .
On 9/27/2013 9:43 AM, Frank Precissi wrote:
WSJT-X is able to interface with DXLabs Commander and use CAT to key the
rig. Or you can use RTS/DTR (if you dont use DXLabs) but you must set
PTT-KEY accordingly.
I've never used anything but VOX to key my rig in SSB or digital modes,
and I'll
Remember -- the K3 has a built-in TX delay that very effectively
prevents hot-switching of the relays in a power amp. The delay is
also adjustable from a menu, so if, for example, you're switching a
mast- mounted preamp with a slow relay, you can provide a little more
delay.
But if you extend
Hello list:
I'm new to a used k2. Yesterday a blinking letter F came on the right
side of the display when in the cw mode c. The c and f alternately
blink. I can't see any explanation in the manual (most likely overlooking
something). I would appreciate a kind hint as to what is going on and
Have been away from my K3(#5763)/P3 for a couple months. Hooked it back up
yesterday and transmitted on a couple of bands to make sure it was working
and the SWR appropriate. All was fine. Today I turned it on and was
listening on the bands. I responded to a CQ on CW and caught that the SWR
Royce,
You have message fast play active.
Look for 'Fast Play in the manual for an explanation and instructions
for how to turn it on/off. It is on page 107 of the current K2 manual.
If you have a old revision, you may want to download the latest manual
from the Elecraft website.
73,
Don
Gary,
Contact k3supp...@elecraft.com before they go home for the weekend.
73,
Don W3FPR
On 9/27/2013 2:30 PM, Gary, W7TEA wrote:
Have been away from my K3(#5763)/P3 for a couple months. Hooked it back up
yesterday and transmitted on a couple of bands to make sure it was working
and the SWR
This argument will never die.
But remember the last time you called CQ and a station came back that you could hear, but
not copy. (I'm thinking CW, but it also applies to SSB).
You know he is in there, but despite struggling with the narrowest possible bandwidth and
every trick your receiver
I stand corrected. Must have thought that was the answer when I danced around
the necessary value on the KAT500 when the KAT3 zeroed right in for a low
SWR.
Sorry, and thanks for the correction.
-
Chuck, KE9UW
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On 9/27/2013 12:37 PM, Vic K2VCO wrote:
This argument will never die.
As long as some of those doing the talking are ignorant of the facts,
yes. :)
I maintain that even ONE dB matters in this situation.
And you are correct. Here are the FACTS. The 6dB and 10 dB rules of
thumb are based
The original question was increasing power from 10W to 20W on a K2 used as an
emergency communication source for serious backcountry trips (multi-day
wilderness whitewater rafting, etc.) That is not very similar to DXing or
contesting. In that situation, you get a few dB by throwing your wire
Gary,
The power supply is on, the power cable is properly connected.
What voltage do you measure on the power cable at the rig end?
On 9/27/2013 2:30 PM, Gary, W7TEA wrote:
Have been away from my K3(#5763)/P3 for a couple months. Hooked it back up
yesterday and transmitted on a couple
This is part of the problem. I'm at another QTH without any equipment so
can't measure the voltage on the rig end of the power cable. Gary from
Elecraft told me that if that tests OK and rig still doesn't fire up, that I
will have to send it in. Taking rig home Monday and putting on a different
I placed the order for the factory assembled KPA and KAT to go with my
K3/100. I would like to identify any specific configuration items I need to
be aware of to hopefully smooth the integration of all three units.
Things already taken care of:
Latest K3 firmware (04.67).
Two 15 pin cables
You are right Vic - it's an old discussion. I was only quoting what the
engineers of ancient times thought was correct.
For myself, I have done tests adding QRN (white noise) to a weak signal
using a noise generator and calibrated attenuator. Bring it up to where I
can almost but not quite copy,
Using a switch for your three devices' RS232 connections reduces the number
of parts on the desk and the number of COMn allocations in your O/S. It may
work for you if your only use for RS232 is occasional firmware updates. In
fact, for that you could lose the switch, too, and just swap
I use a four port USB to serial adapter that connects to four Elecraft
devices. It's almost as cheap and a bit simpler than a switch and associated
cables. Gearmo makes it and I bought mine from Amazon. You might want a KXSER
cables or the equivalent for the KAT500. Or use the KXUSB that comes
Gary,
Power supplies are usually fused on the output. The fuse may have blown due to
the high SWR.
Fuses sometimes oxidize internally, and will blow at lower than rated value.
Perhaps it's period of non-use was a factor. I wish you the best test results.
(Don't forget to check out that
I just realized that my previous message was sent in html format. Which
means that the reflector stripped the text! That explains some of the
answers...
Here is what I meant to ask:
--
I am moving to an apartment on the top
I recently replaced the mother board in one onf the computers here and
found that there were NO RS232 connectors on it, but a kazilion USB
ports.
I remedied the situation by purchasing a SIIG external device with
eight RS232 connectors and one USB 2 port that connects to a USB 2
port on the
Just checked supply. Fuse looks good and while I can't measure voltage under
load, it is putting out 12v as my keyer came to life and greeted me!
Gary W7TEA.
-
73,
Gary W7TEA K3 #1001, #5763
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