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Tranny Q for Hiwatt

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by TheAmpNerd, Dec 7, 2005.

  1. TheAmpNerd

    TheAmpNerd Member

    Messages:
    1,062
    Joined:
    Sep 23, 2004
    Location:
    Tejas
    Hi Y'all:

    I don't know much about Hiwatts.

    Anyone know what a similar replacement Partridge tranny set
    for the CUSTOM 50 would be?

    Along came this hacked up old amp with a Fender power tranny
    and choke, and some unknown output tranny. Cosmetically the
    amp isn't so bad. tranny wise, it sucks, hacked chassis to install
    a through chassis Fender.

    I doubt I'll find the "right" trannies so was wondering what ones
    Hiwatt might have used the same as other companies?

    Here is what the back plate of the amp says:

    TYPE: AP
    Model: DR504
    S/N: 6430

    Any help appreciated.

    My goal is to rebuild this poor amp for me.

     
  2. Tapp

    Tapp Member

    Messages:
    198
    Joined:
    Aug 12, 2005
    Heyboer transformers makes a Hiwatt clone that would probably be my first choice. Mercury Magnetics probably does too. For a general possibly cheaper alternative a Hammond OT would be decent. The old Partridge trannies used in Hiwatts are known to be full range hi end stuff.

    FWIW, Hiwatts did not use chokes but a big resistor for a different "feel".

    tapp
     
  3. rwe333

    rwe333 Supporting Member

    Messages:
    16,007
    Joined:
    Aug 17, 2002
    Location:
    Canada's Capital
    THD makes a fine output x-former.
    Perhaps contact them.
    Ed, your thoughts?
     
  4. Ed DeGenaro

    Ed DeGenaro Supporting Member

    Messages:
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    Jan 3, 2002
    Location:
    Malibu
    If you want to keep it as "Hiwatt-y" as possible I'd go with a partridge. The THD will break up quicker.
     
  5. TheAmpNerd

    TheAmpNerd Member

    Messages:
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    Joined:
    Sep 23, 2004
    Location:
    Tejas
    Anyone know of a vintage source that would use the same one?

    I contacted Partridge, thanks for the thoughts.
    Guessing I'll need to make something that looks like a doubler
    and hammer straight the hole cut where the power tranny is.

    Oh this is going to be a phun one.
     

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