On Sep 4, 2008, at 9:08 PM, Dudley Hurry wrote: > Don, > > Using VAC, you use the VAC TX Gain to regulate your output, if you > are > using the conventional method of physical cables to and from the > computer sound card, use the TX gain. (mic gain) as you would with > any > regular radio. > > In VAC I used the default values. I can send you my values if you > would like.
Normally I would peruse the schematics to try to understand how things work in a radio. Not being able to do that with the F5K, it would be nice to understand how signal levels are managed in the transmit chain. In more traditional SSB radios one has no choice but to control transmit power level by varying the mic (low-level) gain. Gain settings for the rest of the stages are fixed. With the Elecraft K2 we have, I found it works better to optimize the baseband signal level (audio) and then use the power output control to vary the transmitter power. So, how does the F5K work? I would naturally lean toward fixing the baseband signal level and then use the transmitter power level control to set the TX power output but now you are saying that we should manage power using the mic gain. Brian Lloyd Granite Bay Montessori School 9330 Sierra College Bl brian AT gbmontessori DOT com Roseville, CA 95661 +1.916.367.2131 (voice) +1.791.912.8170 (fax) PGP key ID: 12095C52A32A1B6C PGP key fingerprint: 3B1D BA11 4913 3254 B6E0 CC09 1209 5C52 A32A 1B6C _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kb.flex-radio.com/ Homepage: http://www.flex-radio.com/
