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4 X 12AX7 TUBE. USED.
BRAND: GE. 1950s PRODUCTION
17MM LONG GREY PLATES, D-GETTER, COPPER RODS
TESTED IN AMPLITREX AT1000 TUBE TESTER
MINIMUM GOOD EMISSION = 60%
66/108% EMISSION (EM) 87/68% TRANSCONDUCTANCE (GM) 0.2/0.2mA GAS - GOOD EMISSION IN ONE TRIODE
75/66% EMISSION (EM) 66/191% TRANSCONDUCTANCE (GM) 0.4/0.2mA GAS
66/191% EMISSION (EM) 87/118% TRANSCONDUCTANCE (GM) 0.2/0.3mA GAS - HIGH GAIN ON ONE TRIODE
75/60% EMISSION (EM) 87/81% TRANSCONDUCTANCE (GM) 0.3/0.2mA GAS
