Differences between Blaupunkt Koln 'V' & later power amplifiers

[Old Sparky]

Having a working Amplifier from a scrap Koln 'V' (which dates from about 1964) and needing one to go with a later Koin 'Z' head unit, I thought 'No Problem' - I can connect the older amp. to the later radio, which, indeed I could, once I had changed the 'audiio-in' connections to the 9-pole link socket, but then found that the pilot lamp didn't light, which it did  with an amplifier borrowed from a Frankfurt of similar age to the Koln  (BTW Both Kolns and the Frankfurft (W) are all-transistor radios, the Kolns having motor driven self-seek tuning.)  I have circuit diagrams for the later amps., but not the earlier 'V' series one.  Due to the way these amplifiers are made (crammed into boxes about 7"x2"x2") it isn't easy to trace out connections, though it could be done, but if anyone has, or knows where I can get, a circuit diagram & PCB layout for the Koln 'V', this would be helpful.  Thanks in advance.

[Mende]

I don't know whether this will help as I can't identify the exact model but there is a circuit diagram for a Köln 1964 here which would fit your date criterion:
http://www.4tubes.com/SCHEMATICS/Radios/...n-1964.jpg
If there is any problem with umlauts you'll find it here in the appropriate alphabetical place.
http://www.4tubes.com/SCHEMATICS/Radios/...index_img/

There's a KölnG from 1958 here:
http://radio.mijnwijkapp.nl/Blaupunkt_KolnG.pdf
It's a bit early but might be interesting.

Various other Blaupunkts here:
http://www.nvhr.nl/gfgf/schema.asp?Merk=Blaupunkt&Zoeken=exact&isSubmitted=yes

[Mende]

There's a KölnG from 1958 here:

I meant to link to the Köln transistor 1959:
http://radio.mijnwijkapp.nl/Blaupunkt_Ko...sistor.pdf

[Old Sparky]

I've now solved the problem, Mende, but thanks for the links to the various diagrams. The first link is certainly a diagram of a similar, but slightly earlier all transistor model. Other than different output transistors and o/p transformers over the years, the main difference is in the wiring to the 9 or 10 pin link cble socket used, principally the pins used for the dial lamp connections, and the 'automatic' (self-seek tuning) supply. Ironically I used to work for a Blaupunkt dealer as their service engineer, and had a whole load of service manuals, many of which are now gone!!