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(!!!!) (Slightlly microphonic single) JAN-CHS-12AU7 Sylvania "black plates" with "D" getter halo NOS 1951 (9.2/9.8ma)

$ 19.99

1 slightly microphonic low noise tube) 12AU7 Sylvania "black plates" and "D" getter halo NOS 1951 in white box

copper grid posts

"D" getter halo spot-welded to plate post

9.2ma Gm=2100

9.8ma Gm=2200 

- low microphonics - not severe

 

 

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