Hi again!
I was away from this group for some time and didn't see John_F´s
answer until today. I have had quite a bit of worries since it turned
out that the contact elements where missing in all but the used
positions, so we had to get new ones (at 10 bucks APEICE!). Now I'm
only waiting to lay my hands on a proper crimping tool to attach them
to the wires.

Anyway, it seems the wiereing was all wrong in the original
installation, where the power was fed to pin 8, and pin 22 and 23 was
tied together. I guess the Xponder would still operate under these
conditions (it has in fact done so for the last 20-odd years), but it
seems the power filtering and fuse section has been bypassed. Maybe not
so good... Wonder if I dare switch it back to the supposedley correct
wiring? Or maybe there is some quirq with our dear old box that
requires the filters to be bypassed?

/Lars