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(!!!!) (Highest Testing Pair) 71A Philco and Aristocrat test like new 1930's similar build (32.2ma and 32.5ma) 1-3% matched
(!!!!) (Highest Testing Pair) 71A Philco and Aristocrat test like new 1930's similar build (32.2ma and 32.5ma) 1-3% matched
$ 69.99
1 pair) 71A Philco and Aristocrat test like new 1930's similar build - different shape top mica
1 tube) 32.2ma Gm=2000 Aristocrat
1 tube) 32.5ma Gm=2100 Philco
Matched on Amplitrex
Vplate = 180V
Vgrid = -38V
Good Ma = 20ma
Good Gm = 1700
(71A=5V @ .25A Filament)
Typical Characteristics:
Vplate=135V, Vgrid=-27, Iplate=17.5ma, Rplate=1.82Kohms
Gm=1650, Mu=3, Rload=3Kohms, Pout=0.4watts
See more: vacuum tube
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 (Highest Testing Pair) 71A Philco and Aristocrat test like new 1930's similar build (32.2ma and 32.5ma) 1-3% matched "Pin It")