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1 X 6AQ5A HEINTZ AND KAUFMAN TUBE. NEW OLD STOCK.
BRAND: HEINTZ AND KAUFMAN
BLACK PLATES, HALO GETTER, COPPER RODS.
TESTED IN AMPLITREX AT1000 TUBE TESTER:
75% EMISSION (EM) 89% TRANSCONDUCTANCE (GM) 0.6mA GAS