Danish(NTP) amps 12w getting warm

[mg73]

I have 2 solid state mono amps which I believe are NTP
with JS power and input trafo.

Both are working but on one of them the output transistors(2 2N3055)
are getting quite hot compared to the other.

Did a quick look on the voltages and they don't seem too off from each other
but It would help with a schematic.

Anyone recognize these?

 

[gyraf]

Not NTP, but DR (Danmarks Radio, in-house). Those are speaker amps.

DISA 3-1948 "B-forstærker" may be related - attached

/Jakob E.

 

[mg73]

Thanks Jakob, I was hoping you would chime in
I think this schematic is a earlier version
mine also has a MC1456G
but this will definitely help a lot!