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On Tuesday, 13 June 2017 22:03:32 UTC+1, Cursitor Doom wrote:
On Tue, 13 Jun 2017 13:45:40 -0700, tabbypurr wrote:

I'd first be mindful of mechanical damage from doing that. When was the
book written? Germanium?

Haha! I think even those old germanium diodes would easily cope with a
four foot fall!

I think those would be some of the more fragile items. Many have an
extremely thin filament stretching a few mm with no support at all.

The first successful anti aircraft shell proximity fuze that could be fired
out of a gun had 3 hearing aid style tubes.

The thyratron obviously isn't a hearing aid tube - its about the sixe &
shape of the glass envelope.