1. Does the hum actually get louder as you turn the volume control down?
2. Can you measure the voltage of the hum at the speaker?
Quote:
Originally Posted by timmy
the 2 300 v caps rated at 100uf and 120 uf I had put in 2- 450 v 470 uf caps in place of the original and I thought maybe this was a problem but it shouldn't as it's just Alittle harder on the diodes when turned on.
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Sometimes increasing the capacitance value of of a filter cap too much can cause 60hz current spikes that will propagate throughout the entire ground system of the set and cause hum problems. More is not necessarily better.
jr