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Fuse Blowing on Superamp AE 25

Hello!
My AE 25 suddenly blew the main AC (2 amp sloblo) fuse. I took off the bottom cover and can find nothing that looks like a problem - no swollen components, no melting anywhere, etc.
Has anyone else experienced this? I am waiting for mail-order fuses now, and will put in a new one and try it, but it will be two weeks before they arrive. Meanwhile, I'm wondering if this is a common problem - maybe an AC spike that did it if the normal operating current is close to 2 amps? Any experience with this out there?
aatos
yogiboy's avatar
yogiboy
5,654 posts
 
It could have been a power surge. Why are you mail ordering a simple 2 amp fuse? Don't you have a radio shack or hardware store near?
newbee
4,767 posts
 
You may have had a power tube short out.
aatos OP
6 posts
 
Thanks for the idea. I will pull out all tubes before I put in the new fuse, then insert one at a time. Would that cause a problem?

No radioshack around here. No one I have shown the fuse to has ever seen one. Not an audiophile town.
newbee
4,767 posts
 
2 caveats w/new tubes, 1)be sure to turn bias screws back (counter clockwise) to minimum before you insert new tubes and turn on. 2) Although it was not a problem for me with my Cary amps, it is not unusual for a power tube loss to be accommodated by a blown out resistor in the bias curcuit. You should note this when you bias new tubes if it exists.

Hope that solves your problem.
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