My brother Terry and I bought this in the late 1960's from a scrap metal dealer it has been mainly been in my possession apart from it trying to electrocute me a while back it has been and still is an excellent tester . I don't remember what the fault was, I did fix it and being a 110volt appliance I guess I would only be half dead anyway!
When I still had a few sparse grey cells left many decades ago I made up an adaptor for 9 pin sockets it plugged into the 8 pin octal base the 9th pin being the top cap lead. It was in storage for a long time and I lost this adaptor and I no longer have the mental capacity to figure out how I configured it. I recently went to test a twin triode 6SN7 the first test on the roll chart was incorrect it decided it was a detector type diode not a triode the second set of data was correct. Does anyone have the correct settings for the 6SN7?
I will, when time permits, try and reactivate what grey cells are left and attempt to figure it out has anyone got any ideas.
I guess over the years this may have been covered several times if so I apologise for the reactivation.
I posted this on the wrong forum it should have been in test instruments sorry I do not know how to transfer it.

Ok did not follow instructions completely. Testing the first half of the 6SN7 requires Rect Std button and 117n button also to depressed I had not pressed the 117n button..
Sorry I posted this in the wrong topic section.
Regards Jimb