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4 X 12SL7GT TUBE. NEW OLD STOCK IN ORIGINAL BOX.
BRAND: ULTRON. GE PRODUCTION
SILVER PLATES, FLAT GETTER
TESTED IN AMPLITREX AT1000 TUBE TESTER
MATCHED PAIR 1
121/113% EMISSION (EM) 112/106% TRANSCONDUCTANCE (GM) 1.6/1.8mA GAS
121/108% EMISSION (EM) 112/100% TRANSCONDUCTANCE (GM) 0.5/1.6mA GAS
MATCHED PAIR 2
95/108% EMISSION (EM) 87/106% TRANSCONDUCTANCE (GM) 0.6/0.5mA GAS
104/104% EMISSION (EM) 93/93% TRANSCONDUCTANCE (GM) 0.4/0.6mA GAS