Charles wrote:
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.

Thanks for the information: I'm not so sure, the hole in the case and the
socket inside are perfectly made (no sign of anything having been altered)
If you've interested I can send you a (small) photo if you send me an email
address (the one I'm posting from works)