Hi,
I have a 69 Marshall super lead that is blowing (mains) fuses. It doesn't blow them instantly, rather it must warm up first. I thought it might a bad power tube, so I pulled the tubes and powered it up as a test, still plugged into a load. I left it in the basement, and when I returned the fuse was blown and there was a smell, like ozone or smoke. I looked the circuitry over and nothing stood out as burned.
Any ideas as to what I'm up against? Where I should start to look? Bad filter caps? The smell was somewhat fishy... I would appreciate some guidance. I know the precautions about working with tube amps. Curiously, I metered the filter caps after the fuse blew and there was no measurable voltage stored.
Thanks in advance for your help.
I have a 69 Marshall super lead that is blowing (mains) fuses. It doesn't blow them instantly, rather it must warm up first. I thought it might a bad power tube, so I pulled the tubes and powered it up as a test, still plugged into a load. I left it in the basement, and when I returned the fuse was blown and there was a smell, like ozone or smoke. I looked the circuitry over and nothing stood out as burned.
Any ideas as to what I'm up against? Where I should start to look? Bad filter caps? The smell was somewhat fishy... I would appreciate some guidance. I know the precautions about working with tube amps. Curiously, I metered the filter caps after the fuse blew and there was no measurable voltage stored.
Thanks in advance for your help.
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