Wartime miniscope , miniature oscilloscope

Why is there a pot stuck sideways there in the fourth shot, a troubleshooting aid? Ken

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'scope

That is one of the things a previous owner had done probably in 60s or 70s . He probably added the 2 Si diodes then. The genuine pots are very small and the one that should be there is missing replaced with that one , presumably the smallest he could find but too large to fit in place. He must have given up when the carrying strap broke and CRT cracked.

-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on

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'scope

Error. The original is still in place but has a broken tag, but enough remains to measure resistance. The Al cased one is wired in , instead but is too big to replace the original.