NAD '77 JMP

[Exo-metal]

Canadian version laydown mains. Drake T3904 and OT T2668, all original. Panels are notably clean front and back. Itsgoodnow is a RT legend, thank you Chris for making this epic deal.

https://www.craigslist.org/view/d/gilbert-1977-marshall-mkii-super-lead/okuj1wSCrEv4EEhCHqUGCd

 

[Mike Oxhuge]

Looks clean and a decent asking price. Congrats!

 

[Anje]

Niiiice!

 

[RedPlated]

Check the B+ voltages first thing. The last one of those I had here was at 530+ vdc WITH tubes. The PT is multi tap and has a 120vac connection which will reduce the B+.

 

[Exo-metal]

The T3904 was definitely on my radar. Pin 1 to 6 on the primary from what I found. Should respond really well to what I have planned.

 

[dstroud]

nice one!!!

 

[RedPlated]

The T3904 was definitely on my radar. Pin 1 to 6 on the primary from what I found. Should respond really well to what I have planned.

There was a guy who made a post on some forum years ago with the pinouts for that PT.

 

[Exo-metal]

I may want to run 6550s or a pair of KT88s. What do u think?

 

[harddriver]

The T3904 was definitely on my radar. Pin 1 to 6 on the primary from what I found. Should respond really well to what I have planned.

Very nice! you got your laydown PT after all...................................

 

[harddriver]

I may want to run 6550s or a pair of KT88s. What do u think?

According to 4T6&2 the modern 6550 offerings are only rated to 450DCV on the screen voltages. If you already have a stable of EL34 amps 6550s or KT88 are a nice departure IMHO. And in the end if you don't luv them you can always swap back to EL34's if so desired.

When I tried out a few KT88's, the JJ had a very compressed low end that I didn't care for, the old Sovtek and EHKT88's were both good solid modern tubes although I hear the TungSol KT88 is nice as well for modern tubes.

 

[griff10672]

I love 6550/KT88's's in Marshalls .....

 

[Exo-metal]

I do too, if I can run KT88s they are my first choice. Any interest in this read?

https://ampgarage.com/forum/viewtopic.php?t=13877

 

[angelspade]

NICE!!!!

 

[67mike]

Awesome.

Congrats!!!

 

[fek]

Nice! Legendary amp right there.

Personally I would stick with the EL34's. But that is just me.

 

[griff10672]

I do too, if I can run KT88s they are my first choice. Any interest in this read?

https://ampgarage.com/forum/viewtopic.php?t=13877

everytime I go to the Amp Garage ..... my world fills up with wonderful rabbit holes to go down ....

 

[ChurchHill]

Sweet, congrats!! KT88s are great tubes!

 

[FourT6and2]

Check the B+ voltages first thing. The last one of those I had here was at 530+ vdc WITH tubes. The PT is multi tap and has a 120vac connection which will reduce the B+.

That's... very high lol

 

[Racerxrated]

Congrats Ted!

Another interesting example of the differences between the US/England amps, and those that were sold in either Canuckistan or Norther Eu. They all seem to have earlier features (transformers, on/off switches, head shell) that lasted later than the US/British market.
I had a 1982 2104 combo....Canadian...that was a JMP essentially. 2 years after everyone else got JCM 800s.

 

[Exo-metal]

Congrats Ted!

Another interesting example of the differences between the US/England amps, and those that were sold in either Canuckistan or Norther Eu. They all seem to have earlier features (transformers, on/off switches, head shell) that lasted later than the US/British market.
I had a 1982 2104 combo....Canadian...that was a JMP essentially. 2 years after everyone else got JCM 800s.

Exactly and I paid far less for it. If it was an earlier pcb I would pass over the thin/weak traces but by '77 they had it down. I expect it to keep up with my '71 with ease when we're done with it.