2. amps-preamps
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Cary SLI-80 Tube amp suddenly blowing fuses

Very strange problem. Everything works and plays fine, however, the past 2 days I have blown the ac fuse (3 amp slow blow 250v) twice now! The bizarre thing is that it only blows when the Cary is in a resting state ~ for an hour or two. When I am playing music, everything is fine! Strange. Could it be random power line surges? Do you think it is a deeper problem within the 6 month old Cary? Should I swap out the power cord?

Thanks,

Jason
jfiluk
rbc
18 posts
 
I had blowned the ac fuse on my Jolida amp once. I checked the bias setting and there's no problem, think it's more a bad tube. I have replaced the tube and it's doing well now.
john_tracy
341 posts
 
Could be a bad rectifier tube. If they short it will pop the AC fuse. Happened to me with a NOS RCA GTB. Tube tested OK on tester, but the higher voltages in amp would cause it to short.
rbc
18 posts
 
I wonder if this would damage any internal components of the amp?
john_tracy
341 posts
 
Probably won't if you don't stick a "bigger" fuse in it.
hedgehog's avatar
hedgehog
183 posts
 
Doesn't Cary recommend measuring mA, not mV, when adjusting bias?
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