[GreenKeys] (no subject)

[Randy or Sherry Guttery]

amourdutigre wrote:

> Now, I need to be aimed in the direction of a tube based loop
> powersupply circuit without any solid state rectifiers. 

A 117Z3 (miniature) or 117Z4 (octal) will handle a single 60ma. loop
just fine. Both tubes are available from Antique Electronics
(tubesandmore.com) for $3.60 and $2.48 respectively (of course they have
a minimum order of $10.00 - but you'd probably want to order a few
anyway). These would make a Non-isolated supply - but if referenced to
ground- nothing unusual. If you use an isolation transformer (or two
filament transformers back to back) for isolation - then any of the
traditional rectifiers would work 80, 5R4, 5U4, or to be really neat -
use an 83.

> I do not dislike solid state, but I do want to
> have a completely EMP proof system, and I simply like tubes.)

No such thing. While tubes in most traditional circuits tend to be less
vulernable to EMP than some solid-state devices in similar circuits - a
strong enough, close enough EMP will take out everything, including
wires (or more likely - the wire's insulation).

best regards...
-- 
randy guttery

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