Racking a chanelstrip from Swedish Radio desk

Hi.
I am trying to rack an old channel strip from a Swedish Radio console. I can not find the schematics anywhere. I have figured out inputs and outputs but I dont know what voltage to feed it. Has anybody used or repaired this desk? I would be happy for some advice. (or schematics)

The channel strip has the engraving: SR 707 429
It contains Lundahl transformers SR501 & SR502 and 6 what I think is old DOA´s. : )

Here are some pictures:




Henrik

Ask Swedish Radio - that is probably your only choice...

Jakob E.

Yes, thats my guess to. I´m waiting for answers from radio technicians in both Karlstad and Stockholm. I keep my fingers crossed. 

Henrik