2. amps-preamps
  3. 1248906007

Fuses keep blowing

I have a Jolida 502a integrated amp, and it's worked perfectly fine for the last couple of years that I've owned it. Today, I turned it on, to let it warm up before playing some CDs and when I checked on it, "no power", checked the fuse and it was blown. Put another 6.3 Fast Blo fuse in, and powered the amp up again, Couple of minutes later that fuse had blown. So, I put another fuse in and guess what, that fuse blew. So I'm think something must be wrong with the amp, but I can't figure out what it might be. So, I'm asking you guys what y'all might thing it might be. Btw, I had a "tune up" on the amp about year ago and had some resistors and caps replaced, as the amp was approaching the ten year mark. Worse comes to worse, I might have to take a drive up to Annapolis and let the Jolida techs look at it.
cleaneduphippy

Showing 1 response by rleff

rleff
1,065 posts
 
I would pull out one set of tubes left or right channel and then power up;if it does not blow remove the channel installed with the ones removed try again;if it blows there is a bad tube in that set of tubes;either test with a tube tester or try to find which one is causing the fault.
Also is your incoming ac voltage steady or is it moving up and down;this could case the current draw to change and maybe blow a fuse but most likely it is a tube.
If not a tube then a shorted cap or blown grid resistor(s)
would be my next suspects.
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