(!!!) (Best RCA Single) 30 RCA Victor NOS 1940's original box (3.3ma)
$ 19.99
1 tube) 30 RCA Victor NOS 1940's original box
3.3mA
Gm=900
tested on Amplitrex
NOS mA 3.0-3.1ma
NOS Gm 800-900
See more: vacuum tube
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 (Best RCA Single) 30 RCA Victor NOS 1940's original box (3.3ma) "Pin It")