[Elecraft] K3: Odd ALC behavior

[Bob McGraw K4TAX]

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
> _