(!!!!) 56 Arcturus Blue Balloon engraved base tests like new 1930's (5.0ma)
$ 79.99
56 Arcturus Blue Balloon engraved base tests like new 1930's in white box
5.0ma
Gm=1300
(Vfilament = 2.5 volts)
Amplitrex Test:
Vplate=250V
Vgrid=-13.5V
Good Iplate used range= 4.0-4.5ma
Good used Gm= 1100-1300
See more: vacuum tube
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 56 Arcturus Blue Balloon engraved base tests like new 1930's (5.0ma) "Pin It")