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GK 800RB transformer

Discussion in 'Amps and Cabs [BG]' started by cjp3044, Oct 29, 2013.


  1. cjp3044

    cjp3044

    Oct 10, 2008
    Clovis, CA
    Hi all -

    I have a dead 800RB on my bench with a bad transformer. This is an older unit with the horizontal power switch. I have been in contact with Gallien Krueger tech support and was told that they do not stock the transformer - that they do not have a part number and do not know of a suitable substitute for it.

    I was a little surprised but OK, this is an older unit - but not THAT old there wouldn't be people still using these amps or that repairs didn't need to be done.

    So I'm reaching out - can anyone advise me on a transformer replacement for this amp? I can't even find specs on what the output voltages are supposed to be (zero, right now, because it's dead), but I believe one of the outputs is supposed to be 85 volts before it hits (one of) the rectifier(s) - but I couldn't even tell you which rectifier that voltage is supposed to go to even if I had it.

    Anyone? Dead RB800 lying around with a good transformer? Luck with a replacement tranny?
     
  2. will33

    will33

    May 22, 2006
    austin,tx
    I can check mine when I get home tonight if that'll help. In 1996, they switched to toroids, with a change order for the required parts changes. I may have that in an old email I could send.

    If TB'er B-string sees your thread, he could square you away with much better details, tech advise, etc.
     
  3. cjp3044

    cjp3044

    Oct 10, 2008
    Clovis, CA
    Thanks Will. Much appreciated.
     
  4. 350-0004-0 is the part number for the transformer conversion kit (new bottom panel, transformer and hardware). Last I knew it's list price was $130 + shipping.
    I have a .pdf file of the conversion instructions if you want to PM me an email address.
    Email or call: lailany@gallien.com
    or (209) 234-7300 extension 120. 9am to 4pm PST USA.
    The original EI transformer was a special wind, not an "off the shelf".
    Hope this helps.
     
  5. Anyone with interest the transformer conversion kit is still available as of 10/29/2013 for $163.99 plus shipping. Info from the OP today. :)
     
  6. OP, I have a trashed 800RB that I bought years ago as a project. I have no idea of the condition of the PT but if you pay the price of shipping the whole shebang is yours. :)
     
  7. will33

    will33

    May 22, 2006
    austin,tx
    We need more people like Paul in the world. ;)
     
  8. cjp3044

    cjp3044

    Oct 10, 2008
    Clovis, CA
    Yes we do.

     
  9. 1958Bassman

    1958Bassman

    Oct 20, 2007
    If you don't already have it, contact GK for the schematic for that amp- it has the voltages shown for the test points.
     
  10. I sent the OP the service manual and service memos :).
     
  11. cjp3044

    cjp3044

    Oct 10, 2008
    Clovis, CA
    Waiting for the owner to OK the repair - what are these going for on the used market?
     

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