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Preamp repeatedly blows fuses

I've got an Antique Sound USA PA-5 preamp from 1997 that keeps blowing fuses. I originally found the problem last night when I walked away from my chair and came back to find the preamp dead.

I immediately pulled the fuse and it was an "F3A250V" quick blow. I replaced it this afternoon and as soon as I turned on the preamp, it blew the new fuse. No fireworks, no pops, just a dead preamp.

I don't know where to go next, other than to call my local tube amp repair shop.

Any thoughts?
ekwisnek

Showing 1 response by ahendler

ahendler
416 posts
 
I assume the fuse you replaced was on the outside of the unit.
That would be the line fuse. Open the unit and see if there is an internal fuse maybe mounted on a circuit board. If yes check if it has blown and if it has replace. If it blows again you can contact Divergent Technologies for help. They are ASL reps and helped me troubleshoot my Hurricanes
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