71A Cunningham Balloon used/tests like new 1930's (30ma)
$ 59.99
71A Cunningham Balloon used/tests like new 1930's
30ma
Gm=1900
Tested on Amplitrex
Vplate=180V
Vgrid=-38V
Good Ma = 20ma
Good Gm = 1600-1700
See more: vacuum tube
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