Better yet, just turn on the MON function on the radio and listen to the
tones. They must be perfectly clear and clean. And yes, I've found
that over driving the sound card will do really funny things to the ALC
and its display. Start low and work your way up. Remember there are
3 places that likely need adjusting, not just one.
73
Bob, K4TAX
On 8/3/2017 6:03 PM, Brian Waterworth wrote:
Hi Dave,
I was about to write about overdriving your Elecraft transceiver via the
computer sound card output and what that can do to the ALC readout (for me
on my kx3: cause the ALC meter to display nothing), but it sounds like you
are already aware of this fact and have tried to adjust so that you achieve
4-5 bars.
Not sure what OS you are running, but it doesn't matter really I guess. Do
you know if any of the sounds the OS makes are directed through the same
sound card as you send your JT65 transmissions? A long shot to be sure as
I think you are able to recreate this situation whenever and you have some
regularity to the issue you are seeing.
Have you tried to hook-up a small speaker to the sound card output and
listen to what is transmitted to see if the tones are a constant volume or
do you hear drop-outs interspersed throughout the transmit period?
regards,
Brian
VE3IBW
_
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