jasee wrote:
Sorry if this is the wrong group (probably!)
Please advise a more suitable group

I've got this test set, on the back is a mains socket, all the manuals I've
seen in the uk, show a uk socket. This one has six pins, (its the 110volt
version). It's not clear to me which pins are for which.


My guess is that someone replaced the standard socket with a different
one for a special purpose; such as using a large external battery for
extended field use. I know of one 401L modified that way.