Hi Trev, Since the beginning, i always get the same behavior with my K3 #1212 (factory build). I work essentially with JT65A mode; as this mode is a single tone mode, i've set the modulation level just before full ALC and power to 50W (for DX only...). At the beginning of a JT65A transmit sequence, the power start at ~ 25W and go up to ~ 48W in 3 to 5 sec. If the PA temperature is at ~ 40 to 46°C, the power variation is lower and power output start at ~40W; i'm certainly wrong, but i've always thought that this was related to PA temp and, as i never get an output power higher then selected, this was not a problem in my case.
What is a problem for me is the transmit audio response; i've tried to adjust XTAL filter without success; TX EQU compensation too. As my VFO working frequency is always set to the JT65A "preferred" frequency, it's the audio frequency who defines the actual output spectrum; for some audio values, i get well over 3dB output power variations between some JT65A instantaneous frequencies; for example, with a 45W max power, for somes frequencies, level go under 20W; i work with this since more then one year and i'm always hoping that the AGC of my correspondent can handle a "little" ~3dB RF input variation (the QSB is generally higher...) Sorry for this time and bandwidth consuming message. 73 QRO de Rudolf, hb9ari trev wrote: > It's been a long time since I made a post to this group so hope someone can > help. > My K3/100 which has all the latest firmware installed behaves oddly. When > the TX is keyed with > the mic the power out only goes to approx 30watts although it is set to > 100watts. Then it seems > to slowly build when the mic is keyed a few times. Maybe I am missing > something or have a parameter set wrong in a menu. > I would appreciate any thoughts or ideas. Thanks in advance. > Trev GW4IMC > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
