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(!) 12AT7 RCA black plates NOS D getter halo 1950's, slightly microphonic (13/16.4ma) (high Ma and Gm)
(!) 12AT7 RCA black plates NOS D getter halo 1950's, slightly microphonic (13/16.4ma) (high Ma and Gm)
$ 39.99
1 tube slightly microphonic) 12AT7 RCA black plates NOS D getter halo, red printing, LV date code, 1950's in white box
1 section) 13.0ma Gm=6100
1 section) 16.4ma Gm=6800
Good Ma range 8-10ma
Good Gm range 4500-5500
small amount of microphonics when glass is tapped
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 12AT7 RCA black plates NOS D getter halo 1950's, slightly microphonic (13/16.4ma) (high Ma and Gm)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/products/12at7rcalv.jpg?v=1571438848){kind=link}
 12AT7 RCA black plates NOS D getter halo 1950's, slightly microphonic (13/16.4ma) (high Ma and Gm) "Pin It")