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Princeton Reverb

1/6/2000 11:23 AM
Bob	Princeton Reverb My Princeton Reverb wasn't cutting it for live situations so I rebuilt it. Deluxe Reverb Transformers, NOS RCA 6L6's, ss rect, long tailed pair splitter, cathode bias, EVM-12S spkr, 3-spring reverb - this amp sounds awesome except.... it hums all the time (too much for recording) and when I turn the reverb up past 3, that makes alot of noise too (a hum -type noise). Oh, and I forgot to mention the star grounding that I put in didn't help much. I can't tell if the hum is AC or DC (is there a proof positive test), and I've replaced almost every component in the reverb send and return stages, I also have shielded wiring on almost every grid in the amp. What's the next thing to try? Any ideas out there?

1/6/2000 11:23 AM

Bob

Princeton Reverb

My Princeton Reverb wasn't cutting it for live situations so I rebuilt it. Deluxe Reverb Transformers, NOS RCA 6L6's, ss rect, long tailed pair splitter, cathode bias, EVM-12S spkr, 3-spring reverb - this amp sounds awesome except.... it hums all the time (too much for recording) and when I turn the reverb up past 3, that makes alot of noise too (a hum -type noise). Oh, and I forgot to mention the star grounding that I put in didn't help much. I can't tell if the hum is AC or DC (is there a proof positive test), and I've replaced almost every component in the reverb send and return stages, I also have shielded wiring on almost every grid in the amp. What's the next thing to try? Any ideas out there?

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