How to interface to the GRAM socket?

[Geaney]

Bit of an update - I went to do the mod on the Gram input on my other PYE P53 and found a whole can or worms waiting. If you fancy seeing a guy down a hole when it comes to trying to get it working, have a look -

I've ordered up some solder tags strip so I can re-wire the offending section but even then I'm not sure I'll be out of the woods. Ah, it's all a learning experience anyway!
John