01-21-2012, 09:20 PM
OK Terry, if I understand you correctly (I'm looking at the schematic), I take the + side of filter cap 89 off of where it is connected to the cathode of the 7Z4 and connected it to chassis ground? The negative side of filter cap 89 remains connected to the candohm resistor ( 88 ) and the center tap of the HV windings?
The other two electrolytic caps (8uF, 500V each) can be increased to try to reduce hum.
Then, if needed, I can add a 0.1uF, 630V cap from the HV center tap to the cathode of the 7Z4 (which is how the filter cap 89 was attached originally).
Is that about correct? What purpose is the filter cap 89 (20uF, 500V) serving once I connect the pos side to chassis ground?
Again, thanks for holding my hand here...
Mark
The other two electrolytic caps (8uF, 500V each) can be increased to try to reduce hum.
Then, if needed, I can add a 0.1uF, 630V cap from the HV center tap to the cathode of the 7Z4 (which is how the filter cap 89 was attached originally).
Is that about correct? What purpose is the filter cap 89 (20uF, 500V) serving once I connect the pos side to chassis ground?
Again, thanks for holding my hand here...
Mark
