Please ignore this email & respond to email of same title yesterday. I apologize for duplication, but I thought my earlier email was lost. K0KK
radiotelegrapher wrote: > > On 80 meters only, I have moderate distortion of transmitted SSB ouput > from > my KPA100. It's not RF in shack or antenna related as I confirmed on-air > reports by listening on another receiver while transmitting into a dummy > load. The distortion is present only with the KPA100 on: At 10 Watts > (KPA100 off), no distortion; At 11 Watts (KPA100 on), distortion, which > gets > no worse as I run up to 100 Watts. > > The distortion is actually a loud "crack" at the start of a new word or > syllable. However, a continuous sound is clean. A tuning fork by the > mike > modulating at full power sounds fine. From this I suspect the TR switch > in > the KPA100. Tapping components doesn't reveal anything loose. > > In the archives I found reports and fixes for this exact problem. > However, > my KPA100 (Rev E of January 18, 2007) already has the new components from > the fixes: 1K added in parallel to RFC3, C31 changed to .22mF. I also > tried changing R4 to 39K, per Don's suggestion of 3/27/00, but no joy. > > Any ideas? > > -- > > Dick & Judy Lamb > 44 Post RD > Iowa City IA 52245-3622 > > Landline 319.338.2721 > Dick's cell 319.471.3834 > Judy's cell 319.471.3822 > email [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 > > -- View this message in context: http://n2.nabble.com/K2-KPA100-transmitted-audio-distortion-on-80-meters-tp3932006p3933589.html Sent from the [K2] mailing list archive at Nabble.com. ______________________________________________________________ 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
