hi Folks,
my K3 works fine in the Low power mode. But when setting power to more than
12W, i hear the relay switching but i get no output power, the dc power goes to
20A What happens? In the menue, KPA3 is set to nor. Do i have a short in the
KPA3 or ist the problem a Menue setting?
Thanks for
How do I get the sub receiver to receive? I can hear my main receiver on the
left speaker and static on the right receiver. It sounds like I don't have
an antenna on the sub. I checked the sub receiver's frequency with the main
receiver and there is activity on the band.
--
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I have tried all kinds of mics on my K3 but the hand mic that came with the
radio sounds nice and rich. Somehow the transmit EQ gives me greater range
with this mic that has the MH2 element compared to the other mics. I don't
tell anyone at first that I am running a K3 and they are complimenting
Gang,
I'm pulling my hair out over an RF feedback problem with my K3/100, and
wonder if anybody has any ideas? I use an external station controller that
switches key, microphone, CAT, line in/out, etc. between different rigs.
The microphone audio connects to the K3's rear panel microphone jack
This afternoon I tried to upgrade the firmware and got a problen.
Now the K3 TX LED is blinking and the LCD display shows MCU LD
Referring to the handbook It says I should reload the firmware...
My computers tells me the K3 is not responding and wont upload the new
firmware.
Have you tried just running the mic into your K3 without the
external station controller ?
What is that controller ?
73
Stewart G3RXQ
On Sat, 1 Nov 2008 07:57:10 -0600, Dr. James C. Garland wrote:
Gang,
Im pulling my hair out over an RF feedback problem with my
K3/100, and wonder if
anybody
You can't have RF feedback if you are using a dummy load, unless one
of the connectors/leads inside the K3 isn't properly connected -
allowing high levels or RF inside the cabinet.
As per Stewart's comment, have you tried a directly connected mic and
also are you sure that power supply isn't
We have all sorts of microphones in use on the UK Elecraft (SSB) net and
they mostly sound fine. One or two sound really great but that might be
more related to the user's voice than the microphone. The Heil Goldline
usually sounds good, that is using the Pro broadcast element as
opposed to
-.-. --.-N3TU -.-. --.- wrote:
How do I get the sub receiver to receive? I can hear my main receiver on the
left speaker and static on the right receiver. It sounds like I don't have
an antenna on the sub. I checked the sub receiver's frequency with the main
receiver and there is activity on
Guy, K2AV wrote:
beam kind of thing. Although that can be done relatively with the audio
voltage level, it wouldn't allow me to tell a local that his ground wave
signal has gone down 3 db and is staying there, or be able to create data
for studies over time.
You only require that both
Thanks to all for your replies and interest. To answer some raised
questions:
(1) The K3 works well (no feedback) with an MH-2 microphone connected to the
front panel jack. The problem comes about when any other audio source (e.g.,
another microphone, or W2IHY Eq Plus) is connected to the rear
Do you have a direct connection between your computer and the K3? Not
through something like a microHAM controller, right?
I test this all the time. It's usually a cabling problem between the PC and
the K3.
Please use the K3 Utility's Port Tab test communications button or restart
the K3
Right on Joe If you want a test instrument, purchase a test instrument
and don't load up the cost of the K3 for all of the other
users.
It seems like a few folks are never satisfied. They want more and more and
more... It seems like there is no end to it.
I don't think too many folks
I'd like to be able to calibrate it to 1 uV and 50 uV and know that the noise
on the band is -10 or +3 dBuV and that the signal from a friend has gone
down to +18 from +26 last week and previous. That requires a calibration,
and while one could just use what the rig does naturally as a
Jim,
This may, or may not be the root cause of your RFI problem, but it is important
to note that the K3 elevates the ground potential on both the front and rear
panel MIC connectors. This is not a trivial issue. L7 is a 100 uH choke that
isolates the ring of the rear panel TRS connector
Hi Jim:
I'm wondering what external station controller you are using. I'm using a
NCS Multi-Switcher and I ran into very similar issues. I certainly felt (as
did Doug at NCS) that it was a ground loop problem. I used transformer
isolated mike cables and found that it was NOT a ground problem.
Very interesting, Paul. I was aware of the isolation chokes, but hadn't known
anybody to try jumpering them. I'd be interesting in hearing one of the K3
designers explain what they had in mind by wiring the audio inputs this way.
Perhaps it has something to do with using balanced line audio
Wayne, Joe and Julian,
Thank you! I will change to the 0051. If I want lower will send 0050. One
watt increments work for me. I usually use 2 watts or 75, very little in
between. I will use my K2 for variations in between if I so choose.
73,
Bill
K9YEQ
K2 #35; KX1 #35; K3 #1744; mini
Guy,
I too would like that capability, *but* it would not make sense to use the
K3 this way unless it has the long term gain stability (including vs.
temperature changes) to support it. In response to my raising that issue,
Geoff (GM4ESD) emailed me off list to suggest that the J-FET used used
Hi Jamie,
My station controller is a homebrewed unit that switches up to 25 different
control and signal lines (mic, key, speakers, data, Line In/Out, amp relay,
packet, etc.) for three radios and three amplifiers, in any combination. The
controller also operates a separate RF relay unit that
Every time I switch to data mode, the K3 comes up in AFSK A,
which I never use. Is there a way to have it default to FSK
D?
Dave Hachadorian, K6LL
Yuma, AZ
.
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The frequency as always is plus or minus the QRM. There appears to be CW
and SSB contests running on 80m, maybe another morning for keeping the
shack warm with linears!
73 Dave, G4AON
K3/100, Acom 1000, dipole
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Thanks for the follow-up response, Tom. Problems like this can give one a
sinking feeling...
Very glad you're QRV now.
I'm getting ready for Sweepstakes now, our club's big domestic contest of
the year. I'm in Nevada.
73 de Dick, K6KR
-Original Message-
From: Tom Wylie
Dr. James C. Garland wrote:
Gang,
I?m pulling my hair out over an RF feedback problem with my K3/100,
and wonder if anybody has any ideas? I use an external station
controller that switches key, microphone, CAT, line in/out, etc. between
different rigs. The microphone audio connects to the
Jamie,
We had to modify all microHAM interface cables for the K3
to move the PTT ground from Pin 8 to the shell of the Foster
(mic) jack to avoid the Pin 1 problem caused by the common
RF choke (L7) on the front panel board.
I suspect your multi-switcher also connects PTT to pin 2/8,
mic
Trying to do the transmitter gain alignment (5 watt)
Getting the ERR TXG on all bands.
KPA3 not installed.
Stock 2.7 filter installed only.
All modes set to use this filter on xmit using K3 utility.
Have run synth alignment ref osc alignment several times.
All tmp cables are in correct
Dave Hachadorian wrote:
Every time I switch to data mode, the K3 comes up in AFSK A,
which I never use. Is there a way to have it default to FSK
D?
Mine comes up in whatever data mode I last used on that band. I don't know
why yours should behave differently.
-
Julian, G4ILO. K2
Thanks very much to Joe W4TV and Ian GM3SEK for their helpful
comments.Here's what I've learned.
1. RF leakage from the K3 into the 12V power cord does not appear to be a
problem, as Ian surmised. Furthermore, as Ian also noted If the PS is allowed
to float and the common negative return
My brother is working on an intermittent problem with 40 meter receive. It
started out with 40 meters going almost dead. Tapping on the chassis would
return the receive function to normal for awhile. He just opened up the radio
and tried to track down the problem. The KXV60 board, when tapped,
Dave,
It was puzzling. I had the same situation. Because I often
use the MV tap and a number key to change bands, I found that I was
resetting my data mode to AFSK A.
When a frequency is stored in a memory regardless of the mode, SSB, CW,
or data, the data mode in play at the time is stored as
Jim,
When I floated the negative return of the 12V
supply, the distortion in the audio disappeared, so long as
no other accessories were powered by the same 12V power
supply. I measured about 200 mV p-p voltage fluctuations
between the negative supply voltage and the chassis of the
Paul,
Although the inductors may be at fault (and IMHO should be jumpered
out), there are other considerations that enter into the picture. The
most predominate is the power supply. If external boxes have independent
powering, that can often cause problems because the power supply common
is
I dont' know when it happened, but I can no longer get full power out of my K3
(s/n 1417 FW 2.58 DSP 1.94). Using the tune control, power out will not go
above 63 watts. I can do the TXGN calibration at 5W and 50W with no problem.
But if I turn up the power, the output never goes above 63W,
I know it is good engineering practice often to isolate internal
circuitry from chassis ground. Lab quality signal generators, for example,
usually tie the shell of their RF output connector to the chassis via a
(typically) 100 ohm resistor...
Moreover, designers of instrumentation-grade
The exchange here on the reflector is enjoyable and very much a good source
of information. I have no answers for the feedback problem with the K3 but
let me offer my situation.
There is feedback in my audio using the NCS Switcher and I have discussed it
with Doug of NCS. There is no
K3 #272 was on the air for it's first ARRL SS this afternoon, on 20m and what a
treat. This contest and the CQWWCW are the two contests that I dream of, even
though I never post my logs. It's just a great time to stress test the
transceiver and to get a real idea what the bands are doing since
Lynn,
Your problem parallels mine exactly. Although your Astron switching supply
only powers the K3, the Astron internally jumpers its negative voltage
terminal to the chassis and AC ground. If you don't want to rewire the K3's
microphone connector, or jumper an intenral RF choke, as some have
Just built a KPA100 for my K2 S/N 6274. When originally running PSK on the
barefoot K2 had no problem achieving IMD around -30 dB (measured with
PSKmeter). The K2 had a KAT2 tuner which was removed, and replaced by an
external autotuner when the KPA100 was installed.
With the new KPA100 in
For several years I keyed my Dentron Clipperton L amp from the jack on
my Pro II. I did not use any buffer and it always worked fine because
the voltage/current being keyed are w/i limitations of the Pro II.
Without powering up the AMP I ran a cable from the AMP to the jack on
the K3 I just
David,
The KPA100 can be coupling back into the KSB2 option.
Remove the right side panel and tuck the ribbon cable and speaker cable
up into the space at the top of the KPA100 instead of letting it dangle
near the KSB2 board.
I will not guarantee that it will help, but it often makes a
George,
What K3 jack are you connecting the amp to? You should be connecting to
the KEYOUT jack. If you have connected to the K3 PTT input instead, I
could understand that you might have difficulties like you describe.
73,
Don W3FPR
K4GM-George wrote:
For several years I keyed my Dentron
Good Evening,
The Elecraft CW Net will NOT be run tomorrow due to large numbers of avid
(rabid?) contesters banging away at their keyboards :) I am sure they will all
be just a little crazy by this point in the contest so I don't wish to goad
them into untoward behaviors. Next week the
Here you go...
http:/sight.net/K3Meter
And there's a Windows version too! :)
Enjoy!
David, W4SMT
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Sorry. Here's the correct link..
http://sight.net/K3Meter
David, W4SMT
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Fabulous David !
Now add some dampening for the movement and it will be perfect, it's a bit
jumpy at present. Love the meter face.
[Elecraft] So you want an analog s-meter for the K3?
David Fleming dflem at yahoo.com
Sat Nov 1 23:09:45 EST 2008
Previous message: [Elecraft] Elecraft CW
David,
I'd suggest some averaging ... perhaps five or 10 sample
log weighted moving average ... and recommend converting
from BG; to SM; polling since the BG; scale is truncated
if CWT is selected in CW or data modes.
73,
... Joe, W4TV
-Original Message-
From: [EMAIL
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