[Elecraft] [K3] f/w 2.73/1.98 power calibration

[Bob Cunnings]

Have you tried adjusting TXG VCE? With latest firmware, a setting of
-2dB puts my PSK31 power right where it belongs for a given requested
power out. There's then no need to ride the audio input level, which
is a bad idea given the way the K3 ALC works.

Bob NW8L

On Sun, Dec 14, 2008 at 11:44 AM, Richard Ferch <ve3iay at storm.ca> wrote:
> Steve Ward said:
>
>> I just applied the latest beta firmware as I have done many times
>> before, and it looks like this time my power calibration went out the
>> window.  I'm putting out about 70w on PSK31 when I dialed in 45.
>>
>> Just wanted to give folks a heads-up to watch their power output when
>> they start operating under new firmware, it might be time to re-calibrate!
>
> It's more than just the power calibration. Even after calibrating power and
> setting the requested power below 50W, with either 2.73/1.98 or 2.72/1.98
> the power output on PSK31 (in DATA A) mode often exceeds the requested
> power, which results in splatter. I have been having to constantly ride the
> LINE IN and/or sound card output level controls in this weekend's PSK
> contest to keep the power below 50W and PSK signal quality acceptable; I
> have now switched back to 2.67/1.96 for the remainder of the contest.
>
> 73,
> Rich VE3KI
> K3 #1595
>
> _______________________________________________
> Elecraft mailing list
> Post to: Elecraft at mailman.qth.net
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>