Can a purely thermonic cathod work?

Bob Bruhns bbruhns at
Tue Sep 13 17:14:38 CDT 2005

Good point.  The VR (voltage regulator) tubes, and also the cold-cathode
rectifiers like the 0Z4  (zero Z four).

I remember hearing about some close-proximity electron cold-emission
technology some time in the last ten or fifteen years, too.

  Bob, WA3WDR

----- Original Message ----- 
From: "Andre Kesteloot" <andre.kesteloot at>
To: "hal" <hfeinstein at>; "AMRAD Tacos" <tacos at>
Sent: Monday, September 12, 2005 5:23 PM
Subject: Re: Can a purely thermonic cathod work?

> hal wrote:
> > The heater
> > must, likewise, raise the temperature of the cathode to make this
> > possible since a cold
> > cathode would never emit anything.
> >
> One does not necessarily need to heat up a cathode for it to emit
> electrons. Let's keep in mind cold-cathode tubes, such as the VR-75, etc.
> André N4ICK
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