Oh, I completely ignored that I have a high value voltage devider (470k+22k) in the B+ supply. It goes from C2 to ground. It powers the on/off indicator LED.
Not sure if it could contribute to the overheating.
Thanks Soonerorlater, it is a very useful program.
I would need to change the choke to get the voltages up a bit. Would this lighten the burden on the PT?
Experiments with smaller chokes resulted usually in increased hum.
Not sure if it could contribute to the overheating.
Thanks Soonerorlater, it is a very useful program.
I would need to change the choke to get the voltages up a bit. Would this lighten the burden on the PT?
Experiments with smaller chokes resulted usually in increased hum.
Oh, I completely ignored that I have a high value voltage devider (470k+22k) in the B+ supply. It goes from C2 to ground. It powers the on/off indicator LED.
Not sure if it could contribute to the overheating.
A useful way to bleed your caps.
I would need to change the choke to get the voltages up a bit.
A choke of 5-10 H rated at about 100mA would be my choice.
Would this lighten the burden on the PT?
Choosing a choke with a maximum dc resistance of less than 150r should run cooler than your 500r.
Also for good measure check capacitor C2 is not excessively hot ( again a relative thing ). Inspect for bulging of the body or top.
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