UY-224 RCA Balloon used/good 1930's (37/25) (3.0ma Gm=700)
By Tube World
$ 10.99
1) UY-224 RCA Balloon used/good 1930's
Amplitrex test:
3.0ma
Gm=700
TV-7 test: 37/25
See more: vacuum tube
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