Amp blowing fuses

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...

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.

From a different standpoint, I had something similar happen with my 2 new VAC Statement monoblocks. Turned out that all fuses aren't necessarily the same. There is a greatly increased amount of current when an amp first turns on and if the fuse is not designed to accept this,it will blow most every time, regardless of its amperage rating. That's what happened to me when I got local Radio Shack slo blo fuses, as compared to the slo blo fuses VAC sent me.

My point is that before you go to any more trouble, just have Quicksilver send you some spare fuses for your amp. They will know which ones to send if you describe your situation. That would be the first thing I would have done. The other suggestions above are also helpful, but the easiest fix to try would probably be what I am suggesting. Good luck.

I repeat, you could have a bad rectifier in the filament supply.....

I agree with Hifigeek1, and a much higher probability than a transformer shorting.

To save some money, do you know anyone with basic electronics knowledge that owns a multimeter and soldering iron? They could measure the bridge rectifier, transformer, and anything else for shorting. Read the part numbers off any failed component, and order a replacement from many sources, excluding the transformer which would be available from the mfr.

Orrr, take it in for repair. Shouldn't be too costly unless a transformer.

Frank