Lucien;
Thank you!
I am away from home at present and will come back again when I am back. The regulator is the same one and the panel looks as if it ,may once have been the same. Perhaps its best to add that the panel has a lot of carefully welded up holes in it, mainly in the lower part of the panel, yet the wiring seems to he unmolested, Blackly tape under zinc buckles for cable lacing and all very tidy, perhaps a re-work or built in a modified form.
This one seemed to control in the usual laconic fashion, but experience with the ones in our class 08 shunters taught me to treat with respect, we sometimes got Dowdings to re-work them, until they decided they could not anymore, then I used to have a go myself with varying results!!
Regards
Ian
So I suppose the big question is how to find out the resistance values?