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(slightly microphonic tube) 12AU7A RCA tall black ribbed plates

(slightly microphonic tube) 12AU7A RCA tall black ribbed plates "D" getter halo used/tests like new 1950's (8.2/8.8ma)

$ 15.99

1 slightly microphonic tube) JRC-12AU7 RCA tall black ribbed plates "D" getter halo tests used/tests like new 1950's no printing

8.2ma Gm=1800

8.6ma Gm=1800

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