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2 X EF86 TUBE. NEW OLD STOCK.
BRAND: TUNGSRAM. 1970s TESLA PRODUCTION.
GREY PLATES, HALO GETTER, MATCHED PAIR.
TESTED IN AMPLITREX AT1000 TUBE TESTER:
93% EMISSION (EM) 125% TRANSCONDUCTANCE (GM) 0.0mA GAS
100% EMISSION (EM) 127% TRANSCONDUCTANCE (GM) 0.1mA GAS