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(slightly microphonic tube) JRC-12AU7 RCA tall black ribbed plates "D" getter halo tests like new 1950's (9.6/10.4ma)
(slightly microphonic tube) JRC-12AU7 RCA tall black ribbed plates "D" getter halo tests like new 1950's (9.6/10.4ma)
By Tube World
$ 12.99
1 slightly microphonic tube) JRC-12AU7 RCA tall black ribbed plates "D" getter halo tests like new 1950's
black sharpie mark over "JRC-12AU7"
9.6ma Gm=2000
10.4ma Gm=2100
See more: vacuum tube
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