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1 X ECC81 / 12AT7 TUBE. NEW OLD STOCK.
BRAND: ULTRON. 1960s JAPAN PRODUCTION.
GREY PLATES, HALO GETTER, COPPER RODS.
TESTED IN AMPLITREX AT1000 TUBE TESTER:
122/114% EMISSION (EM) 110/104% TRANSCONDUCTANCE (GM) 2.0/1.0mA/V GAS
CH168U1