Hi, I saw your thread on the STA-53. I can't find any pics on Internet of this thing. I'm working on one now. Does this receiver have a stereo lamp? Mine looks like it would say 'overload' where the lamp would be, but I don't see anywhere else.
Edit: I think I figured it out. Looks like dial ptr has two lamps and will switch with stereo lock.
Edit: I think I figured it out. Looks like dial ptr has two lamps and will switch with stereo lock.

I am unsure where I put it as I never installed it. It may be in the box in the attic. I will look when I can and let you know if I find anything.
Brian