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1 X 12AT7 / ECC81 BELVU TUBE. NEW OLD STOCK.
BRAND: BELVU. 1960s PRODUCTION.
GREY PLATES, HALO GETTER, COPPER RODS.
TESTED IN AMPLITREX AT1000 TUBE TESTER:
90/88% EMISSION (EM) 94/87% TRANSCONDUCTANCE (GM) 5.0/0.6mA GAS