1631 used/good 1940's (12.6V Filament, not a 6L6 sub)
$ 14.99
3) 1631 RCA used/good 1940's
(1631=12.6 Volt Filament 6L6, derated to 17.5 watts)
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3) 1631 RCA used/good 1940's
(1631=12.6 Volt Filament 6L6, derated to 17.5 watts)