Ken, That does not make sense. The Power output for RTTY is no different than CW (or TUNE) except that the audio input to the K2 is different from CW. There is no band to band difference for the K2 - AFSK modulation is AFSK modulation no matter which band it is on.
I would be looking for RF Feedback problems on 15 meters. Try it into a dummy load and see if things are normal - if so, look at your antenna system or the solution. OTOH, if all bands behave the same way when operated into a dummy load, then look to your RTTY driving software and whatever interface you are using. Actually, RTTY AFSK is more related to SSB transmission than CW, so try SSB as well. If SSB transmission os OK, then your RTTY driving system is suspect (but would be the same on all bands). If your problems are confined to only 15 meters, then look at the possibility of RF Feedback on 15 meters. 73, Don W3FPR Ken Alexander wrote: > I completed building my KPA100 a few weeks ago. It passed all tests and > checks all the way through. However, today I noticed something strange. > > I'm operating in the CQ WPX RTTY contest this weekend and spent most of the > day on 20m with the Power set to 50W. I went to 15m to try it out. With the > Power control still set to 50W I hit the Tune button to get my remote > autotuner to tune to 15m. The K2 and my external power meter indicated the > normal 20W, as it should in Tune mode when the power is set higher than 20W. > > When I went to transmit RTTY (without touching the Power control), my > external power meter barely indicated 10 watts. This only happens on 15m. > > As an experiment, I went to the CW portion of the band. Tune gives you 20W. > Keying the transmitter with my paddles give me 50W. > > Any ideas would be appreciated. > > 73, > > Ken Alexander > VE3HLS > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 9.0.733 / Virus Database: 271.1.1/2685 - Release Date: 02/13/10 > 03:43:00 > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
