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1  British Style / Plexi Lead, Bass, Superlead / HT Fuse 500mA Blowing after 10 minutes of playing on: June 04, 2013, 03:34:31 PM
My amp has a PPIMV. When I dime the controls and max the PPIMV my HT Fuse (500mA) blows after 10 minutes of playing. However when I run the PPIMV at 50% the amp can be played endlessly.

I have this layout. http://www.ceriatone.com/images/layoutPic/marshallLayout/Plexi50LeadCeriatone.jpg

With a multimeter the reading at HT1 is 433 dcv.

If that reading is fine, could the problem be that the amp is biased too hot?
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