Oldskoolfan
Journeyman
Just to be clear, the diodes are paralleled across C6, cathode to anode?Back to back in parallel, so anode to cathode on one end, anode to cathode on the other end.
Just to be clear, the diodes are paralleled across C6, cathode to anode?Back to back in parallel, so anode to cathode on one end, anode to cathode on the other end.
YesJust to be clear, the diodes are paralleled across C6, cathode to anode?
Also they used ferrite beads
They have zero to do with thump, they are decoupling to counteract the inductance of the power supply wires leading to these distant rail points.View attachment 86825these two caps are tied one to each rail and ground. They are not in any schematic and I'm wondering if a tech put these in to reduce/eliminate the "thump". They are .33uf, 100v caps. There is almost no thump on power on or off.
Situational. Counteracts the paralleled base connection which can lead to high frequency oscillations. These aren't on earlier amps, suspect this was discovered and the practice started. It is not the best way to deal with it but this is easy.This one got the caps but no beads.