[R-390] Tubes new or used?

[Bob Camp]

Hi

Oddly enough you use helium for the same cooling in micro watt level 
precision quartz resonators. With them you look for a leak with a 
radiation sensor that finds a stuff at the few atoms level. Takes a 
long time to chop a 2X4 a few atoms at a time.

	Take Care!

		Bob Camp
		KB8TQ


On Feb 2, 2005, at 8:36 PM, Bill Hawkins wrote:

> Bob Camp said,
> "If you ever want to sell the radio as a  "100% real
> thing" then plug it back in."
>
> Ah, but don't turn it on!
>
> Hydrogen is used to cool multi-megawatt power company generators.
> Less "air" resistance and better cooling. Lotta risk to using H2
> but there must be a payoff. Then again, an invisible hydrogen fire
> is no worse than an invisible 2000 PSI steam leak. You know the
> leak is there because of the noise and the clouds of condensate.
> You look for it with a 2X4. When the 2X4 gets sliced through,
> you've found the leak.
>
> Regards,
> Bill Hawkins
>
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