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1 X 12AT7 TUBE. USED.
BRAND: BRIMAR. 1960s PRODUCTION
GREY PLATES, TILTED D-GETTER, COPPER RODS
TESTED IN AMPLITREX AT1000 TUBE TESTER MINIMUM GOOD EMISSION = 60% 78/66% EMISSION (EM) 68/68% TRANSCONDUCTANCE (GM) 2.0/1.4mA/V GAS