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5 X 12SX7GT TUBE. NEW OLD STOCK IN ORIGINAL BOX.
BRAND: ULTRON
BLACK PLATES, TILTED RECTANGULAR GETTER, COPPER RODS, MATCHED QUINTET.
TESTED IN HICKOK 539C TUBE TESTER:
MINIMUM GOOD EMISSION = 60% = 1640uMHOS
4000/4000uMHOS EMISSION (EM)
4000/4000uMHOS EMISSION (EM)
4000/4100uMHOS EMISSION (EM)
4000/4000uMHOS EMISSION (EM)
4050/4000uMHOS EMISSION (EM)