I think Min is passing me ! I am going to build a pair of Poseidons
in a week or so, for a guy that found my website, should be fun.
TomMcNally wrote:Did you try a filament center tap ? It's important.
The only other thing I see in your pictures you have
lots of dissimilar things bundled together ... AC and
audio, etc. You have the audio input leads running
through all kinds of other wires.
I'd troubleshoot by doing this:
remove all wiring to the input terminals and short them
remove the feedback connections for testing purposes
make sure the main filter capacitors are grounded at
the negative end of your diode bridge ... directly ... no long wires
try to determine if the hum is being radiated into the
circuitry magnetically from the power transformer
or chokes
The proximity of the chokes to the output transformers
could possibly induce hum right into the transformers
I doubt the bias has anything to do with it. Make sure all
external devices are disconnected when you are listening
for hum ... just the amp with shorted inputs and your ear
against the speaker
deicide67 wrote:TomMcNally wrote:I did not get much further into rewiring. I was out of good solder. The stuff I have is the no lead stuff and it is horrible!
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