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2 X EF86 TUBE. NEW OLD STOCK.
BRAND: TESLA. 1960s PRODUCTION.
GREY PLATES, SQUARE GETTER, MATCHED PAIR.
TESTED IN AMPLITREX AT1000 TUBE TESTER:
93% EMISSION (EM) 111% TRANSCONDUCTANCE (GM) 0.0mA GAS
93% EMISSION (EM) 116% TRANSCONDUCTANCE (GM) 0.1mA GAS