F-52984=417A Western Electric used/good 1959 (20ma and Gm=18,100)
By Tube World
$ 139.99
F-52984=417A Western Electric like new (5939=1959) in white box
20ma
Gm=18,100
Tested on Amplitrex
Good Ma range NOS 20-30ma
Good Gm range NOS 18,000 - 25,000
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See more: vacuum tube
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