(!!!) (Best Value Pair) 71A Sylvania branded Raytheon NOS 1947 (25.2ma and 29.2ma)
$ 114.99
1 pair) 71A Sylvania branded Raytheon NOS 1947
1 tube) 25.2ma Gm=1900
1 tube) 29.2ma Gm=2000
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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 (Best Value Pair) 71A Sylvania branded Raytheon NOS 1947 (25.2ma and 29.2ma) "Pin It")