Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: isaac_teller on May 31, 2021, 10:22:33 am

Title: 5F1 with 6SL7 and 6BM8 reverb
Post by: isaac_teller on May 31, 2021, 10:22:33 am

Hello. I'm building a 5F1 with a 6SL7 instead of a 12AX7. Would I need to up the anode and cathode resistors on the triodes to compensate for the lower gain of the 6SL7? The reverb section will remain unchanged. Several years ago I built it as pictured and it sounded great.
Thank you.


https://music-electronics-forum.com/filedata/fetch?id=841116&d=1456179449

Title: Re: 5F1 with 6SL7 and 6BM8 reverb
Post by: sluckey on May 31, 2021, 10:42:31 am

I've had good results with 120K plate and 2.2K cathode...   http://sluckeyamps.com/RCA/Ampeg_J12B.pdf

Also used 270K and 4.7K...   http://sluckeyamps.com/rocky/rocky.pdf

Title: Re: 5F1 with 6SL7 and 6BM8 reverb
Post by: isaac_teller on May 31, 2021, 10:52:49 am

Thank you.