6SL7GT Brimar NOS black base black plates 1950”s (2.2/2.4ma) (slightly microphonic) Title: 6SL7GT

1 low noise slightly microphonic tube) 6SL7GT Brimar NOS black plates D getter 1950”s

1 section) 2.2ma Gm=1500

1 section) 2.4ma Gm=1600

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