[R-390] Tubes new or used?

[Bill Hawkins]

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