Re: RCA AR88D Comms Receiver.
I've now discovered the mixer isn't fully home in its socket. A couple of other valves are the same leaving a 5mm gap between the base and the socket surface. Because the mixer socket is mounted 30mm below the level of the chassis I can't push it too hard but whatever is stopping it going home is pretty solid. I had to change one socket already because the contacts had sprung open and weren't gripping the valve pins.
The sockets are cheap and nasty (what we used to refer to as "muckite") so I'll fit a standard black IO socket at the mixer for starters (top right in picture).
My stock of 6K8/X65 etc are all in very used condition so I wouldn't be surprised for most to have poor emission or a bit gassy.
Allan
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