I've constructed a simple 2-stage valve preamp (voltage gain and cathode follower).
Each of the stage works fine independently, but once i put the stages together with a capacitor the cathode follower's bias voltage changes and puts it in cut-off state.
Im suspecting that its caused by the coupling capacitor's leakage but i can't be sure, I'm currently using a 250V Metalized P.E. cap.
If it is caused by the leakage, then how do i solve it, if not then what other causes could there be?
Each of the stage works fine independently, but once i put the stages together with a capacitor the cathode follower's bias voltage changes and puts it in cut-off state.
Im suspecting that its caused by the coupling capacitor's leakage but i can't be sure, I'm currently using a 250V Metalized P.E. cap.
If it is caused by the leakage, then how do i solve it, if not then what other causes could there be?
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