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(!!!!!) (Best Sylvania Pair) 71A Sylvania NOS same build 1945 and 1947 (26.0ma and 26.2ma) 1% matched

$ 119.99

1 pair) 71A Sylvania NOS same build 1945 and 1947 1% matched

1 tube) 26.0ma Gm=1900 (JAN-CHS-71A) Sylvania 1945) original box

1 tube) 26.2ma Gm=1900 (Sylvania branded Ken Rad 1947) in white box

 

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

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