04-01-2021, 10:34 AM
if you have 64VAC on the chassis (I take it you mean the Earth GND that you measured it in reference to) this could mean:
1. Capacitive divider 131 from L and N to chassis. This is normal. If you connect a say 10K resistor from it to GND it should go to zero.
2. Check your caps there for the value. 0.015uF is plenty. If you put some larger value - replace.
3. Simply ohm out the input plug to chassis, see if there is some finite resistance there.
4. A capacitive coupling to the chassis via transformer also could make 6oV but it should be extremely weak and not cause any feelings when touched.
5. Check the transformer for leakaga. (same as in bullet 3)
As for the clicking noise....short of pulling the output tubes, see what tube pulling stops it. if does not, pull the output tubes, one by one. Always leave one tube in.
1. Capacitive divider 131 from L and N to chassis. This is normal. If you connect a say 10K resistor from it to GND it should go to zero.
2. Check your caps there for the value. 0.015uF is plenty. If you put some larger value - replace.
3. Simply ohm out the input plug to chassis, see if there is some finite resistance there.
4. A capacitive coupling to the chassis via transformer also could make 6oV but it should be extremely weak and not cause any feelings when touched.
5. Check the transformer for leakaga. (same as in bullet 3)
As for the clicking noise....short of pulling the output tubes, see what tube pulling stops it. if does not, pull the output tubes, one by one. Always leave one tube in.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
