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(slightly microphonic tube) JRC-12AU7 RCA tall black ribbed plates

(slightly microphonic tube) JRC-12AU7 RCA tall black ribbed plates "D" getter halo tests like new 1950's (9.6/10.4ma)

$ 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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