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HT winding center tap question.

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  • HT winding center tap question.

    Why do most guitar tube amps use a center tap on the HT winding? The tap is not grounded like the CT used for the heaters, but rather goes to a node created by two high voltage electrolytics.
    Wouldnt a simple single HT winding have done it?

  • #2
    It's one way of ensuring the exactly half the HV supply voltage appears across each capacitor.
    Last edited by nickb; 07-11-2017, 08:23 PM. Reason: Typo
    Experience is something you get, just after you really needed it.

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    • #3
      I know Marshall uses a doubler circuit. Fender used sort of a half wave rect circuit with the CT grounded

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      • #4
        Have a read of The Valve Wizard
        Voltage doublers are something different https://en.wikipedia.org/wiki/Voltage_doubler
        My band:- http://www.youtube.com/user/RedwingBand

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        • #5
          Originally posted by diydidi View Post
          Fender used sort of a half wave rect circuit with the CT grounded
          Which Fender circuits are you looking at? Can you post a schematic? The Fender amps I see with a center tap are two diode full wave rectifiers. The diodes conduct on alternate half cycles.

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