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929 Posts
Everything is original even the power tubes (Mullards) and preamp tubes (Brimar)
The main disconnect has been replaced and the standby switch, other than that it was all original when I got it.
Because it's going to be a "player" for me I did a full cap job (F/T)
Mains - 100uF+100uF
Screens - 32uF+32uF
PI - 32uF+32uF
Preamp - 32uF+32uF
Bias caps - 16uF
I also lightly modded it but kept all the original parts to put it back to stock if need be down the road.
1971 one great year for Marshall, always loved the sound of these amps with the laydown PT's.
Nice !!.......thank’s for posting !
 

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201 Posts
Looks like a student is going to lend me a 50w JMP non-MV four-input head. LOVE these amps. He's the original owner, still original tubes, etc. Very much looking forward to re-visiting the design. Gonna be a good companion to some of the other amps I have here - a new Sound City SC30 combo, heavily modded Traynor YBA1 (now a master volume Marshall/Vox hybrid), an old solid-state Yamaha 50w combo (for jazz gigs, etc.)... Go to cab is a dual-ported Thiele-design Rivera TAC112 loaded w/ Eminence EVM12L-style speakers (200w EM12 and/or EM12L).
 
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