CS Forums $upporter
- Mar 8, 2014
Are you saying the feedthrough capacitor shorts out? I doubt a broken one would affect audio frequencies and cause a hum. I would suggest an open ground pin.Okay guys so here is the final conclusion:
The J1 connector on this faulty radios is connected via 37 feedthrough capacitors. One of the feedthrough capacitors is broken, somewhere deep inside. The hum disappears when I push really hard on the plastic cover of J1 connector inside the radio. When I stop pushing it, the hum comes on again. On my other Syntor X, the J1 connector connects directly to the board, without feedthrough capacitors. Since there is no spare board or spare J1 connector in my shack, the radio will be dismantled for parts.