Its always been a mystery to me how they get a ring of pins through the
envelope and remain gastight for decades.
I see he got around it by going linear and just squashing a tube down to
that line of pins and then wiring out to a conventional ring of pins base
format.

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Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/