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(!!!) (Recommended Pair) 71A Sylvania and Sylvania branded Tungsol NOS 1947-1950 same build (30.2ma and 32.4ma) (Highest mA and Gm)
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(!!!) (Recommended Pair) 71A Sylvania and Sylvania branded Tungsol NOS 1947-1950 same build (30.2ma and 32.4ma) (Highest mA and Gm)
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(!!!) (Recommended Pair) 71A Sylvania and Sylvania branded Tungsol NOS 1947-1950 same build (30.2ma and 32.4ma) (Highest mA and Gm)1 pair) 71A Sylvania NOS made in 1947 printed in 1949 and 1950 1 tube) 30. 2ma Gm=1900 printed in 1950 1 tube) 32. 4ma Gm=2000 printed in 1949 branded Tungsol Tested on Amplitrex Vplate=180V Vgrid= 38V Good Ma = 20ma Good Gm = 1600 1700 (71A=5V @ . 25A Filament) Mu=3 Rplate=1. 82Kohms Rload=3Kohms Pout=0. 4watts
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1 pair) 71A Sylvania NOS made in 1947 printed in 1949 and 1950
1 tube) 30.2ma Gm=1900 printed in 1950
1 tube) 32.4ma Gm=2000 printed in 1949 branded Tungsol
Tested on Amplitrex
Vplate=180V
Vgrid=-38V
Good Ma = 20ma
Good Gm = 1600-1700
(71A=5V @ .25A Filament)
Mu=3
Rplate=1.82Kohms
Rload=3Kohms
Pout=0.4watts
(!!!) (Recommended Pair) 71A Sylvania and Sylvania branded Tungsol NOS 1947-1950 same build (30.2ma and 32.4ma) (Highest mA and Gm)
Item no
:
3186719557
US$ 119.99
Pay in 4 interest-free payments of $30.00 Learn more
Min. order:
1piece
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Aug 12 - Aug 17
US$40
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Exchange/Return Notes
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- Please click here for more details>>> Return & Exchange Policy
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