[CambridgeWorks]

Paula, you are an absolute mine of information and expert at passing it on in an easy, understandable manner.
I keep out of discussions on these sig gens as it is well over 25 years since I worked on them as part of my self employed work.
I must say, I never saw sockets fitted on any 9081/9082 at all.

Stock faults istr are the reed relay (fm board??) that if faulty gave no fm mod indication on the meter, despite being present. The other was the flickering fm indication on the meter with no mod present. This was never cured, but reduced often by just cleaning up the main vco pcb screw fixing positions (earthing) with a fibre tip brush.
One peculiar fault I do recall is a mains modulation hum. Rotating the toroidal transformer maybe 30 degrees helped in reduction.
Why? I don't know!
Have fun. I am sure this will eventually be working to spec.
I still have my 9082, not used maybe 5 years? Plenty of tants to explode yet!
Rob