When powered up, my T-4XB is showing high (pegging the meter) idling bias current in a similiar manner as that described by K7FD. The relay does stay open. Bias voltage from the AC-4 is a little low at -20 to -55. The schematic for the PS calls for a two stage electrolytic cap at C5 with values of 20 mfd and 150 volts in each stage. My AC-4 has two stages of 40 mfd and 150 volts at C5. This cap appears to be an original. The rest of the components are the same as in the schematic. I'd like to replace C5, and would like to know whether it would be better to go with the 20 mfd value called for in the schematic, or use the 40 mfd. value. I have a pair of 22 mfd. 160 volt caps as well as a pair of 47 mfd 250 volt caps, so I could go either way.
Thanks,
Don McNallen
W5EI
