Systemic Development > Amplification and Preamplification

Power supply help please...

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Barry (NJ):

--- Quote from: HAL on May 14, 2021, 04:52:51 PM ---Do you hear the noise through the speakers as audio signal as well?  If so, then it is the power supply.

The pictures of the power supply caps look like some of them have bulging tops.  Those are possible signs of out-gassing from electrolytic caps going bad.  The date codes are from 1994.  Those are 27 years old and most likely ready for replacement.  The mechanical noise is the transformer trying to produce a lot of current trying to feed power supply caps that are low impedance internally.

An amp tech can check them and replace if needed.  If they fail it will be a big mess.

Good luck!

--- End quote ---

Thanks, I'll try to find someone local to bring the amp to.

Folsom:
I have an ifi Ground Defender and results of sound quality on DAC were not desirable. I have yet to AB with my HumX I use in another location.

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