On 24/02/2021 10:25, Brian Gaff (Sofa) wrote:
So what exactly was the neon doing?
I well recall the early Bush colour tvs which when you looked in the back
had glowing neon's used as voltage regulators.
Brian


I vaguely recall 40 odd years back working on test equipment where a
neon and photo transistor were used as some form of isolation to pass a
50Hz mains synchronisation signal. The circuit stopped working when the
inside of the neon glass started to go black which was the common fault
on that equipment.

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