[ARC5] VR Tubes

[J. Forster]

Some discharge tube have radioactive material in them to stabilize the
starting point. It's common in RADAR TR tubes and Krytrons.

In voltage regulator tubes, instant on is far less important than in
switching tubes.

-John

========


> "For one thing, VR-tubes must be able to have some input from light to
> "encourage" the formation of the internal "plasma""
>
> Then how does the one in my RT-7/APN-1 work given that it is sealed inside
> a case that has only a few air holes in the back?
>
> Admittedly when I fired it up in order to see that big black line on TV
> channel 14 I always did it with the case off so I could see that neat blue
> glow.
>
> Wayne
>
>
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