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Hoffman Amps Forum image Author Topic: Princeton Reverb Build: CAP Can Question. Is it bad?  (Read 2116 times)

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Offline chriscwill07

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Princeton Reverb Build: CAP Can Question. Is it bad?
« on: February 09, 2019, 05:08:55 am »
Just finished up my princeton reverb build and I am getting some crazy 60 cycle hum. I have narrowed the problem down to something in the reverb circuit or tone stack. So naturally wanted to check B+ voltage DC and AC. Went to check AC on filter cap can and it is swinging around like crazy. Is my cap can bad? or is this 60 cycle from somewhere else. BTW I have wired up a star ground and every combo of grounding schemes and that will not fix it.

Offline sluckey

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Re: Princeton Reverb Build: CAP Can Question. Is it bad?
« Reply #1 on: February 09, 2019, 05:21:00 am »
What kind of meter? Show us some pics.
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline chriscwill07

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Re: Princeton Reverb Build: CAP Can Question. Is it bad?
« Reply #2 on: February 09, 2019, 07:43:36 am »
What kind of meter? Show us some pics.

Its just a general amprobe autoranging multimeter. It is on AC.

 


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