[sdiy] Where to get Positron Triodes?

[Alex Stettler]

I've got a somewhat different solution for your problem:

I'd use protons instead of positrons :-)

build a tube with a hydrogen gas fill (very low pressure).
In this tube you have a small filament and a plate in opposite direction.
A voltage of about 70VDC on this small diode produces an electron beam,
which ionizes the hydrogen. (Same principle as in EI mass spectrometers).
Now you have the positive particles. I'd suggest the rest of the tube is
built
the same way as it's usual in normal electron tubes. Instead grid and plate
have
negative potential.

Alex

PS: This is some sort of humor, too. But probably it works ;-)

> -----Original Message-----
> From: owner-synth-diy at dropmix.xs4all.nl
> [mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf Of Grant Richter
> Sent: Tuesday, September 09, 2003 9:43 PM
> To: xyzzy at sysabend.org; john mahoney
> Cc: synth-diy at dropmix.xs4all.nl
> Subject: [sdiy] Where to get Positron Triodes?
>
>
> I'm having a hard time replicating 4000 series CMOS circuits in
> vacuum tubes
> without a P-channel device. Does anyone know a source for
> Positron Triodes?
>
> (this is humor, sort of)
>