2. amps-preamps
  3. 1345153289

Amp blowing fuses

I have a pair of quicksilver kt-88 monos and one is blowing 3A slo-blo fuses instantly on powerup. I have swapped all the tubes from its mate and looked at the chassis wiring which is discrete, point to point. It looks clean with no hints of overheating or trouble. I've thought about trying a 4A fuse but wanted to get opinions as maybe one of you have had a similar problem... thanks for any help, opinions etc...
rawinsonde

Showing 7 responses by rawinsonde

rawinsonde OP
47 posts
 
Thanks for all your help and suggestions. I will try the preamp cable swap and try powering up without the rectifier tube before looking for a repair shop...
rawinsonde OP
47 posts
 
Hi, I pulled the rectifier tube out, inserted a 3A SB fuse, turned on power and the fuse did blow. How certain are you about the problem being a shorted power transformer? There is no visual indication (top or underside) of damage.
rawinsonde OP
47 posts
 
No, I guess I could short across the capacitor leads with a screwdriver but have no idea how to measure a bridge rectifier or discrete diodes. Does this require unsoldering?
rawinsonde OP
47 posts
 
I have a multimeter and a soldering iron but am a bit intimidated by a tube power amp...
rawinsonde OP
47 posts
 
Yes, I can take some pics of the . I'll go ahead with that...thanks I appreciate the help. I might be able to get a schematic. I'll try retrevo or other forums. I sure appreciate the help!
rawinsonde OP
47 posts
 
Thanks to all of you who posted help and suggestions. I may have found the culprit, a diode in the rectifier circuit reads shorted. I had to order a few of them online from radio shack. We'll see in a few days if that fixes it...
rawinsonde OP
47 posts
 
In addition to all of your helpful posts, I would like to especially thank Frank (Metro04) who spent a lot of time with me in detail checks and troubleshooting. Without that help, I think I would still be down as there are no service outlets available here for the product.
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