Just finished building the KX1 and the transmit testing is not going well. My only bench tool is a DVM.
Power supply is a 13V battery. Ant is a 50 ohm dummy load. The receiver seems to work fine. All DC voltages on RX are nominal. On 40m TX, I get about 1.5W out. The signal is clean listening with my K3. On 20m TX, I get about 2W out but there is a horrendous audio oscillation. My P3 shows huge sidebands on the signal. All the TX DC voltages look good EXCEPT for the base of Q7, which is supposed to be 0.7V. I measure -0.895V on 40 and -0.195 on 20. I have examined all the suggested areas, but I don't find any obvious problems. Anybody have a suggestion of a cause of this behavior? ----- 73, Stan - KR7C -- View this message in context: http://elecraft.365791.n2.nabble.com/New-KX1-low-power-and-20m-oscillation-tp7531133.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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
