Tube Amp Archive

xtian wrote: ↑Sun Jul 21, 2024 8:35 pm

Soulchief wrote: ↑Sun Jul 21, 2024 6:04 pm1R Grid Leak Resistors

No, the 1R are bias sense resistors.

Oh yes I see that now. I accidentally skipped a path with my eyes.

Thank you all so much!

Oh wow thank you! Regarding my initial post, I misinformed about Super Reverb OT (2 ohm), SR was in my brain, just planning 2-6L6 - Multi-Tap OT or just 8 Ohms. That schematic looks great! The main value changes I see are the .1 > .047 PI to Power Coupling Caps -- and -- 220 > 1R Grid Leak Resistors...

Hello all, I would like to build an AB763 2-6L6 style power amp section only with a 1/4” input. Maybe with a Super Reverb OT. I know the Power Amp Section begins at the .001uF Coupling Cap entering the PI. Does anybody know of or have a layout to correctly add Input Jack and Volume Control and anyth...

Quick followup

I made a quick sketch of a potential layout to see if this would work?

Also, would any kind of resistor be needed at the switch for any reason?


Thank you again

Oh perfect

Thank you for the View!

AB763 Switchable Mid Cap question: I have a few model AB763’s (Deluxe, Super, and a Champ) all with .022uF Mid Caps. All my amps are heads and I use various speaker cabs with all. Some 10”, some 12”. Question: Has anybody done a Switchable / Toggle Mid Cap in the these amps to go from the .022 (supe...

Speaker Line Out Isolation Transformer question: Does anybody know what Type/Spec ‘Isolation Transformer’ Suhr or Bradshaw uses for their Speaker Line Out Boxes? Correct resistances? Want to attempt to make one. I see these resistance specs options but don’t know what is needed: — 600:600 — 10k:10k ...