Here are the specifications of an interesting tube - the Amperex ZB120. ZB
means zero bias. It is:
"especially designed for Class B amplification. Can be used as linear r.f.
power amplifier." It has a carbon plate.
What is interesting about this tube and specifications is not the power level
(only a few hundred watts), but the date of publication of the book that lists
this tube: The 1938 Radio Handbook.
Here we thought we were forging down the path of discovery only to lrean that
our grandfathers already went there and did that.
--- COLIN LAMB
--- k7fm@teleport.com
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