Ampeg PF-500 faulting (tripping)

[weidnca]

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!

Thanks!

 

[Downunderwonder]

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.

 

[jnewmark]

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!

Thanks!

Mega thread on this issue- use the search function.

 

[weidnca]

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...

 

[chiplexic]

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.