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485 Sylvania engraved base used/good 1934 (8.3ma)

485 Sylvania engraved base used/good 1934 (8.3ma)

$ 19.99
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485 Sylvania engraved base used/good 1934 

8.3ma

Gm=1500

 

(variant of Type 27 with 3V @ 1.25A filament)
(Sparton=The Sparks-Withington Co., Jackson, MI)

See more: vacuum tube
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