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71A Raytheon 4-Pillar box-plate used/strong 1930's (24.8ma)

Name: 71A Raytheon 4-Pillar box-plate used/strong 1930's (24.8ma)
Brand: Tube World
SKU: 71A
Price: 39.99 USD
Availability: InStock

$ 39.99

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

24.8ma

Gm=1600

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

See more: vacuum tube

Tags: 1940's, 71A, National Union

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