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Old 11th Aug 2018, 11:59 am   #10
ms660
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Join Date: Apr 2011
Location: Cornwall, UK.
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Default Re: Marshall JTM45 Guitar Amplifier- Mains (Primary)Fuse Blows

Just that....Grid bias...which has to be -ve WRT the cathode(s).

Lawrence.

Last edited by ms660; 11th Aug 2018 at 12:07 pm. Reason: clarification
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