[Amps] Heathkit SB230 - Help

[Martin John Hallsworth]

Hello,
Thanks for having a look at this
I am looking for a circuit diagram, description of operation and a
parts list for this amplifier.
If possible a PDF file or a link to some site that has the same information
so I can pass the information on to a friend whom needs to service /
rebuild his amp.

P.S.
any mods / improvements / better cooling ?


Thanks Martin G1GYC