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56_National_Union_used_good_1940_s_5_3ma

56_National_Union_used_good_1940_s_5_3ma

56 National Union used/good 1940”s (5.3ma)

Category: vacuum tube SKU: TOY393746

$2.70 ~~$8.99~~

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Description
Customer Reviews (0)

56 National Union used/good 1940”s

5.3ma

Gm=1100

Tested on Amplitrex:

Vplate=250V

Vgrid=-13.5V

Iplate good range = 4.5-5.5ma

Gm=1400

(Vfilament = 2.5 volts)

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