Not to hold you up, I've had a look at the tuner module behind my dashboard outside the office, the lead I have, I'm now sure, is the right socket (banana plug), but the wrong plug, it dates from the days before standardisation, about '62, I think - it's what we now use in the UK for a TV/FM plug.

Sorry.

Don't the guys at Empeg Towers know where they sourced the adaptor? - worth asking.

Even worse, this is why I originally needed it, my 1962 Christmas present!