** The devices are DARLINGTONS - dickhead.
Did you not notice the total absence of DRIVER transistors - eh ???
The pair are MJ2501 and MJ3001.
.... Phil
> All seems original in there and o/p devices TO3 Motorola, badged SCSP1
> and SCSN1. Presumably , as only +/-24V rails 3055/2955 would be
> adequate
This schematic shows MJ3001 and MJ2501 as equivalents for SCSN1 and SCSP1:
http://www.drtube.com/schematics/marshall/2099u.gif
These are Darlington pairs, so they have much greater hFE than the
2N3055/MJ2955. They're only about a fiver a pair from Farnell.
--
Adam Sampson <a...@offog.org> <http://offog.org/>
The info is out there, for all, in ASCII format now
** If someone fits 2N3055s and MJ2955s instead of the correct types, the
transistors will run hot but deliver low power.
Seen done it a few times and the repair tech could not figure it out.
.... Phil