(!!) (Slightly microphonic single) 6SN7GT Brimar UK NOS slightly microphonic 1960 era (6.8/7.8ma)

1 tube slightly microphonic) 6SN7GT Brimar UK NOS slightly microphonic 1960 era in whit ebox

6.8ma Gm=2500

7.8ma Gm=7800

- low microphonics; only when tube is tapped on

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