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Ampeg PF-500 faulting (tripping)

Discussion in 'Amps and Cabs [BG]' started by weidnca, Mar 25, 2014.

  1. weidnca


    Apr 3, 2011
    Anyone had any issues with their PF series head "faulting"?

    I purchased my first when they hit the market, and loved it; after using for a year, the fault circuit starting tripping, and the amp lost signal power (AC was good, just no output). Ampeg replaced it under warranty; now I have the same issue with the replacement head.

    Has anyone had, or heard of anyone having, these issues? I'm huge fan of Ampeg, even owning other Ampeg units (SVT-450, 1966 B-15-N, 410HLF cab, (2) PF210 cabs), but this head (the PF-500) is really becoming frustrating....especially when it happens live!

  2. It may be up to revision F by now. You don't hang round at TB much! Supposedly the issue was finally resolved some months ago. It's going to be interesting to see if Big A make you whole, being an original owner of an improperly fixed dud design.
  3. jnewmark

    jnewmark Supporting Member

    Aug 31, 2006
    Stax 1966
    Play guitar.
    Mega thread on this issue- use the search function.
  4. weidnca


    Apr 3, 2011
    I did use the "search" function, but I didn't feel like spending (3) days reading through all of the positive/negative remarks regarding the entire rig....I just needed a little info regarding the "fault" problem...
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  6. chiplexic


    Apr 21, 2004
    If the revision version is up to F, (6) I'd be curious as to which version they sent back to you as a replacement "fix". Maybe someone knows where the easiest place is to look on the amp to find it. I believe it is on the circuit board. I'd really like to gain confidence they fixed this in the most updated units.

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