VK7JB wrote > > But I've noticed that when listening to the KX1's transmitted signal > (using my K3 as receiver) on 20m only is very raspy. >
John, I had a similar experience to you (though without the 30/80 module). My P3 showed strong 60Hz modulation of the output signal on 20m and a much smaller modulation on 40m (not audible). The audio on 20m was definitely "raspy". The KX1 was connected to a dummy load via 25 ft. of RadioShack RG58 and I had no antenna on the K3. I thought the modulation was an oscillation at first, but after monitoring the KX1 output signal on my scope, I realized that the modulation had to be due to some other cause, and I suspected RFI in the power supply or cables because of the 60Hz sideband spacing. I changed my coax to a 3 ft piece of RG213. The 20m signal immediately became clean on my K3. The longer the coax, the more apparent modulation of the received signal. All signal reports that I received from QSOs gave me a clean tone report and I asked several ops whether there was any hum or buzz on my 20m signal. Nobody reported any modulation. Do you have a scope to look at the KX1 output? If not, you might want to get some on-air reports to determine if there is a real problem in the transmitted signal. ----- 73, Stan - KR7C -- View this message in context: http://elecraft.365791.n2.nabble.com/KX1-new-build-transmit-problem-on-20m-tp7557147p7557182.html Sent from the Elecraft 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
