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2 X 12AT7 / ECC81 TUBE. NEW OLD STOCK IN ORIGINAL BOX.
BRAND: UNITED. 1970s PRODUCTION
GREY PLATES, HALO GETTER, COPPER RODS
MATCHED PAIR
TESTED IN AMPLITREX AT1000 TUBE TESTER 90/112% EMISSION (EM) 89/102% TRANSCONDUCTANCE (GM) 2.6/0.8mA/V GAS 86/110% EMISSION (EM) 82/86% TRANSCONDUCTANCE (GM) 1.6/0.8mA/V GAS