On Thu, 14 Feb 2008, dwight elvey wrote:
  I wish to make a correction. The tubes were
called audions and were
 not made until 1906. Low gain made them hard to use for radio uses 
 "Audion" and "hard to use for radio" is a contradiction...
 Christian 
Hi
 Low gain and high capacitance between grid and plate
made them hard to use for RF. Audio amplification
could be used after a diode detector.
Dwight
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