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Is it oscillating?
I was trying to figure out what was done under the orange shrink wrap too.
I agree with Tschrama.
I’ve built three 100w versions of this (I...
Yep the 76 have those green caps that sound good, although ‘aggressive’. They don’t often fail in circuit but can be easily damaged, particularly...
on v1 shared cathode you might find swapping the electrolytic down to 22 or 47uF assuming you have 820R resistor.
Of course I have not got the amp in front of me to test but this issue with pots is a weird one. A carbon tracked pot will drift up a little - in...
Kinkless Tetrode is spot on with both of his posts - can’t add any more!
It is good to see progress. Some aspects I would do differently (like the yellow wire crossing heaters obliquely and the preamp socket wires I’d...
It is a JTM50T with a JTM45 faceplate from the factory so I guess it is up to you what you call it, probably transition JTM45 Trem?
These things don’t come up very often and it will go to the highest bidder who is unlikely to be a talented young musician.
You may be affronted...
What sort of PPIMV do you have and what make of pot is it?
Do the pots measure the same at different angles of turn of the pot?
If we have...
Looks very good to me
Marstran 784-128 OT
Drake or Dagnall clone 3H choke
I bought some modern ones off eBay. until I was fortunate to get some originals from a member here.
They are very close. I have some spares.
Not entirely correct they were the first batch in 76.
Later 76 amps were cascaded like the 2203 (which was only ever cascaded).
Step by step guide...
Sometimes you can tell by the wiring colours and type of insulation but the pics as they are don’t show enough detail