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2 X 7643 / E80CF WESTINGHOUSE TUBE. NEW OLD STOCK.
BRAND: WESTINGHOUSE
GREY PLATES, HALO GETTER, COPPER RODS, MATCHED PAIR.
TESTED IN FUNKE W20 TUBE TESTER:
TRIODES: MINIMUM GOOD EMISSION = 60% = 8.3mA
10/10mA EMISSION (EM)
PENTODES: MINIMUM GOOD EMISSION = 60% = 6mA
7/7mA EMISSION (EM)