F-52984=417A Western Electric used/good 1959 (20ma and Gm=18,100) Title: 417A

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

– LAMM LP2 phono
– Wavelength Signature 45 2004
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– Supratek phono