KWS-1 Tracing Signal Advice
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K1JOS:
My KWS-1 generally works well but requires a very high knob setting on Carrier Level (9 /10) to get correct drive for tuning/loading in CW to full output. All resistance/voltage checks closely match the manual. I have isolated the problem as signal loss to the 6CL6 driver pair grids. I checked PTO output which is very good. So, problem is somewhere between the 250kc oscillator and 2nd amplifier (V203). I tried to follow the signal in CAL emission mode from the osc through each stage with a scope 10x probe (10M/11pF) but it loads down the circuit. It may be my technique of using tube extenders on two tubes between each stage. I tried to get under the chassis but the stage compartments in the KWS-1 are just too tight to get a scope probe onto tube pins or the deeply embedded domino mica caps. Any suggestions for cobbling together a better scope probe to do the job?
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