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Cary amp fuse blowing 1 advice 2 Bay Area fix?

Hi. Well, starting yesterday, when I turn on my Cary SLI-80, after around one minute, the fuse blows on the left hand side. Tried it twice now.

1. Could this possibly be due to a bad tube? All the tubes appear to light up fine. Is it worth experimenting with swappping tubes, trying to nail down the bad one (I'd hate to put my amp through six more blown fuses while I experiment unless it's likely to find the cause.)

2. I'm always inclined to send a unit back to the manufacturer for repair. That of course takes weeks round trip plus risk of damage or loss. SO, if any of you know someone in the BAY AREA, Northern California, that could fix this, that might be preferable.

Thank you!
Art
artmaltman

Showing 4 responses by artmaltman

artmaltman OP
769 posts
 
I think I'm using a half amp 250 volt fuse.
I'll check with Cary on this.
(IPA ok?)
Thanks,
Art
artmaltman OP
769 posts
 
I called Gerald at Cary, and he suggested it probably was the power tube. And to be extremely careful with the bias setting.

I checked the manual and there is an AC fuse (which did not blow) and two "tube fuses" (one of which did blow). The tube fuse is correctly half-amp 250 volt quick blow.

Sounds promising.
I'll update this tomorrow.

Thanks,
Art
artmaltman OP
769 posts
 
Tubes it was. I swapped in a set of Svetlana KT-88's and it'a biasing fine now and sounding great.
Thanks all.
Art
artmaltman OP
769 posts
 
Yes I have had to replace a fuse after tubes blow. The fuses are located in the back of the amp near the a/c cord. You unscrew the black cap. Make sure to use the proper fuse! If I recall correctly, it is specified in the manual.
Art
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