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Fender Bassman 100-Watt 70's Blowing Fuses

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  • Fender Bassman 100-Watt 70's Blowing Fuses

    I play out a lot. I use a Vox AC30 but I also use a Fender Bassman 100-Watt from the 70's, it's an older silverface


    Recently it blew a fuse 


    When I replaced the fuse, it blew a fuse again


    I know I got to take it in, but do you think they're gonna tell me "You need to change the tubes" or they're gonna to tell me I need a huge costly repair where it would almostbe better to just buy another fender bassman from the 70's like on ebay? 

    I really like it's tone


  • #2

    Likely bad power tubes or possibly shorted power caps. If you been running it on a higher impedance cab the bassmans have a tendency to blow the grid resistors. Hopefully thats all it is. They are cheap to replace. 470 ohm 1 watt resistors. The tubes go south running with the wrong impennce then the grid resistors blow taking out the fuse. I did this to may bassman many times as a ked before I figured out what was going on.

    If the caps went bad it may have blown a power transformer but lets hope for the best. A transformer is about $100~150 which still isnt bad. You'll need a matching quad set of power tubes though.