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John Smith[_7_] · November 13th 11, 07:42 AM posted to rec.audio.tubes,rec.radio.shortwave

On 11/12/2011 11:12 PM, Don Pearce wrote:
On Sat, 12 Nov 2011 17:24:02 -0800 (PST), wrote:

On Nov 12, 2:44 pm, John wrote:
On 11/11/2011 10:10 PM, RHF wrote:

...
-wrt- Faraday Cage :
Old Metal {Steel} Garbage Can with a
tight fitting Lid. -store-holding-
+ The Solid State AM/FM/SW Radio
+ Plenty of Batteries
-or- Re-Chargeable Batteries and a
Solar Charger

-no-tubes-required- ~ RHF
.

Satellites are withstanding these on an almost daily basis, for years,
if not decades ... doesn't seem to be a real problem anymore ...
however, laying hands to that technology might be a bit of a different
story ... as, while one nation might wants its' own satellites hardened,
it certainly doesn't want the enemies ...

Regards,
JS

As far as I know- none of the satellites are using vacuum tubes .
That's the reality .

Dream on. Just about every satellite in the sky uses vacuum tubes. The
TWT (travelling wave tube) is still the way to generate high, reliable
power for space-borne transmitters.

d

They would be fools to attempt to boost the weight and fragility of
vacuum tubes into space, if they have any other alternative ... high
power is easily handled with the modern transistors ... the energy
requirements of the heaters is also another no-go ...

Regards,
JS