Though members might like a look at this. Acquired lately, works perfectly. Anyone know much about these? Can anyone provide a copy of Handbook?

here's a bit more of the same.

It appears to be from 1984.
Check esupport.sony.com for a manual.

Thanks very much A.A. for the link. I got a copy of the handbook. Great!

Yeah, these are great. The 5000 was the predesscor to the glorious TC-D5. These came out in 1978 believe it or not & ran off a 12V circuit rather than 3V.