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what type of amp is this schematic

Discussion in 'Amp Tech Center' started by MOSi, Dec 7, 2018.

  1. MOSi

    MOSi TDPRI Member

    23
    Oct 22, 2018
    Saint-Lazare
    I know nthing about electronics but I found the scematic to this amp I'd like to buy and I'm trying to know what type it is(A AB) is it cathod bias? ...

    Thank for your help.
     

    Attached Files:

  2. Viejo

    Viejo Tele-Holic

    917
    Feb 12, 2011
    Central IL
    It looks like an a fixed bias push-pull amp with reverb and a power tube bias varying tremelo . I would expect it to be biased in class AB
     
    Last edited: Dec 7, 2018
  3. Lynxtrap

    Lynxtrap Tele-Holic

    553
    Feb 29, 2016
    EU
    Hard to read that schematic, but there is a cathode resistor with a bypass cap on the power tubes, and I can't see a negative voltage supply, so that would be cathode bias, not fixed bias. And it's push-pull, which some people automatically but somewhat erroneously call "class AB", unless it's an AC-30 ;)
     
    Last edited: Dec 7, 2018
    Wally likes this.
  4. clintj

    clintj Friend of Leo's

    Apr 4, 2015
    Idaho
    Cathode biased, class AB, with the tremolo acting on the power tube grids.
     
    bblumentritt likes this.
  5. MOSi

    MOSi TDPRI Member

    23
    Oct 22, 2018
    Saint-Lazare
    Thank you guys really helpfull
     
  6. bblumentritt

    bblumentritt Tele-Afflicted Platinum Supporter

    Dec 3, 2012
    Austin, Texas
    This.
     
  7. MOSi

    MOSi TDPRI Member

    23
    Oct 22, 2018
    Saint-Lazare
    Wow thank you bblumentrit I had been looking for info on those an I don't know why I never got around to see that description... I have been going back and forth for the price. He is asking alot but I really interested.

    Great help thx
     
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