Hey Shortlife, welcome to the depot
. I suspect MJMP can cast an experienced eye on it for you. But hey 3TM, noise mod and MDRT are a great start
So it hasn't had the battery mod and that looks like an original battery (which means it will probably die soon, they are very old these days) so write down any patch settings you make that you want to keep (just in case, when the (memory) battery dies, so do your patches).I'm curious about the front input jack, it looks like the rear jack mod as IIRC the front input on a MP1 isn't a normal jack socket
but I don't see signs of de-soldering on the rear jack (where it attaches to PCB) so I may be wrong (or was it a later revision...).The Svetlana tubes should sound good, though depending how old they are some new tubes will sparkle the unit up. IIRC MJMP likes JJs in his 3TM, and yours has 2 Svetlana (to me they look like long plates) and the one closest to the front I can't tell, seems to have red logo, maybe a JJ
but you can see the internal design is quite different and it's a short plate