Here are some shots of my sr 2060. I hope that it has all the power and clairity of yours, but with an integrated radio.
Please would you email the 3 transistor ID numbers and their
position in the pre driver stage ( 3 small transistors in a row #806-12? #808-12?) (would be temporarily of a great help)
or better and later the schematics??
Regards
Les
lezco266@bell.net