Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: sam on May 03, 2026, 03:34:15 pm

Title: Super 6G4A speed Pot
Post by: sam on May 03, 2026, 03:34:15 pm

Greetings,
Planning a 6G4A build. Anyone who has built this circuit what did you do about the 4M-RA pot for vibrato speed. Can't seem to find that resistance. Did you use a 3M-RA? or some other substitute. Suggestions welcomed.

SR
 

Title: Re: Super 6G4A speed Pot
Post by: sluckey on May 03, 2026, 04:17:29 pm

The 3M-RA will be fine. Speed just won't go quite as slow, but that can be compensated by using larger caps in the feedback circuit.

Title: Re: Super 6G4A speed Pot
Post by: sam on May 03, 2026, 05:17:06 pm

I'll do that. Thank you for your quick response.