Valve....New ?

[AlanBeckett]

There's also the Russian 'Rod' Valves - http://www.radiomuseum.org/forum/russian...tubes.html

and the sub-miniature WW2 Valves used in Proximity Fuses and later Hearing Aids - http://www.r-type.org/addtext/add032.htm

I remember PW doing a tiny Radio with the latter.

Alan