Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: chriscwill07 on February 09, 2019, 05:08:55 am

Title: Princeton Reverb Build: CAP Can Question. Is it bad?
Post by: chriscwill07 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.

Title: Re: Princeton Reverb Build: CAP Can Question. Is it bad?
Post by: sluckey on February 09, 2019, 05:21:00 am

What kind of meter? Show us some pics.

Title: Re: Princeton Reverb Build: CAP Can Question. Is it bad?
Post by: chriscwill07 on February 09, 2019, 07:43:36 am

Quote from: sluckey on February 09, 2019, 05:21:00 am

What kind of meter? Show us some pics.

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