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2 X 12AT7WC SYLVANIA TUBE. NEW OLD STOCK.
BRAND: SYLVANIA. 1970s PRODUCTION.
BLACK PLATES, HALO GETTER, MATCHED PAIR.
TESTED IN AMPLITREX AT1000 TUBE TESTER
116/140% EMISSION . 112/123%GM ( TRANSCONDUCTANCE ) 1.2/1.4mA/V GAS.
104/128% EMISSION . 101/109%GM ( TRANSCONDUCTANCE ) 0.8/1.0mA/V GAS.
