My PC to KPA100 communication suddenly failed. Checked the cabling and did some initial tracing from J1 to U4. Seems ok incl. RFC:s. I found deviating voltages on U4 pins: 2 -5,5 3 -10,7 4,5,6 -5,5 7,8 -10,7 with remaining U4 pin readings ok. Then tried to find the 16293 kHz signal on my SW receiver but couldn´t hear it. I however find -75 V at the end of the diode chain.....so is the HV xtal oscillator at fault or not? Any suggestion on what to do next is much appreciated! Thanks, 73, Per SM0WRA . K2 no 1623, K1, KX1
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