TRS-80 Model 12 crt substitution

From: Tony Duell <>
Date: Thu Mar 4 17:37:41 2004

> > isn't in the M4, so there probably isn't in the M12 either --
> > the CRT can
> > hold a charge for a lot longer than 'overnight'.
> Ah, I didn't know that - I thought they discharged naturally.....

Rememebr that the dielectric (insulator) in this capacitor is the glass
of the CRT itself. And that glass is a darn good insulator. I suspect
that most of the leakage occurs via dirt on the surface of the CRT
(forming a conducting path between the anode connector and the outer
coating), via atmospheric moisture, etc.

Received on Thu Mar 04 2004 - 17:37:41 GMT

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