I can actually remember being 'educated' with tubes like these - physics 
was one of my favourite subjects at school - I must have been about 11 or 
12 years old at the time, perhaps 13 at a push and I seem to recall it was 
all about illustrating electron flow and the effects of magnetism on it.
Happy memories!


On Wednesday, 12 February 2020 02:33:10 UTC, Paul Andrews wrote:
>
> Thanks David. They are indeed educational tubes: 
> https://en.m.wikipedia.org/wiki/Teltron_tube
>
> I wonder if you could make an oscilloscope clock out if the cathode ray 
> tube? Assuming they have the deflection coils.
>

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