Hi Elekrafters I need your help.
My K2/100 nr. 03529 with KSB2 SSB adapter and KAT 100 Antenna Tuner has been working perfectly since I built it, with the exception of some minor problems that were solved either with the help of Don Wilhelm or after a search in the e-mail list reflector. But now I detected a problem unnoticed until now: I work mainly CW and digital modes. In 40, 30 and 20 meters, in PSK 31 or RTTY, I could get easily about 40 watts output, corresponding to one bar flickering in ALC bargraf. So all was apparently all right. But I have tried recently the 10 m. band and noticed that when selecting my RTTY filters configuration I can get only near 20 watts in rtty, and less than 10 watts in rtty-r. When I use in this band the USB or LSB configuration, and transmit RTTY or PSK, I get about 90 watts, the same output as in CW.. I have seen now that this drop in output happens in all bands, but I had’nt noticed it because I was able to get 30-50 watts in the lower bands, even in RTTY configuration. The same output drop happens in QRP configuration. Summarizing, in digital transmissions when in RTTY the output is significantly lower than when in SSB, and the higher the frequency the lower the output power. I realigned my filters with the help of Spectrogram, applying the same settings for OP-! SSB and OP-1 RTTY (there were some small differences before this realignment), but to no avail. Although I can continue working digital modes using the SSB configurations, I would like to know the reason of this behaviour and how to solve it. Your help will be greatly appreciated. Best regards Raimon EA3EZO [email protected] ______________________________________________________________ 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
