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FOR SALE: 2 X 12BY7A TUBE. NEW OLD STOCK IN ORIGINAL BOX.
BRAND: NEC. JAPANESE PRODUCTION.
GREY PLATES, HALO GETTER, MATCHED PAIR.
TESTED IN FUNKE W19S TUBE TESTER
MINIMUM GOOD = 7.5mA = 60%
17.5/16.5mA EMISSION (EM) 16.5/16.5mA EMISSION (EM)