Blackface Bassman blowing fuses on startup

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Blackface Bassman blowing fuses on startup

Postby Yoda on Thu Apr 21, 2016 4:31 am

Hello all,

I have a BF Fender Bassman with the AA165 circuit, I just performed a 3-prong conversion, and replaced all electrolytic caps (filter, bias, and cathode bypass). When I plug it in, the fuse blows as soon as I turn on the power switch. If it helps, I did the 3-prong conversion first and then the fuse blew after I tried to test the 3-prong conversion so I decided to proceed with replacing all the electrolytic capacitors and trouble shoot everything afterwards. Everything looks good to my eye but perhaps those of you with more experience could shed some light on what I can look for as far as troubleshooting.

Thanks in advance for any help.
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Joined: Mon Mar 30, 2015 2:27 pm

Re: Blackface Bassman blowing fuses on startup

Postby stratele52 on Fri Apr 22, 2016 2:31 pm

Pictures of your 3 prongs connexion and your filter caps.

If fuse blow just after your 3 progs mod ; you must be sure your 3 prongs wiring is ok ; picture please
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Location: Québec province, Canada

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