'74 Marshall JMP50

The original rectifier reservoir cap in this amp was the wrong value: 200µF @ 350V.  Most likely the capacitor was originally intended for use in a Marshall Major.  Somehow, it survived 36 years drawing heavy ripple current with over 410V across it.  

I replaced all the electrolytic caps in the amp and added some output tube and transformer protection features, threw in a few NOS tubes - two Mullards and one Sylvania.

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