71A Raytheon 4-Pillar box-plate used/good 1930's (23ma)

Name: 71A Raytheon 4-Pillar box-plate used/good 1930's (23ma)
Brand: Tube World
SKU: 71A
Price: 33.33 USD
Availability: InStock

$ 33.33

71A Raytheon 4-Pillar box-plate used/good 1930's engraved base

23ma

Gm=1700

SINGLE TUBE, NOT A PAIR

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

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