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2 X HK-24G / 3C24 TUBE. NEW OLD STOCK IN ORIGINAL BOX.
BRAND: HEINTZ AND KAUFMAN. 1960s PRODUCTION.
TESTED IN FUNKE W20 TUBE TESTER:
MINIMUM GOOD EMISSION = 60% = 25mA
77mA EMISSION (EM)
74mA EMISSION (EM)