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2 X ECC85 TUBE. NEW OLD STOCK.
BRAND: TESLA. 1960s PRODUCTION.
GREY PLATES, RECTANGULAR GETTER, MATCHED PAIR.
TESTED IN AMPLITREX AT1000 TUBE TESTER:
112/128% EMISSION (EM) 110/114% TRANSCONDUCTANCE (GM) 0.4/0.4mA GAS
112/132% EMISSION (EM) 110/120% TRANSCONDUCTANCE (GM) 0.6/0.8mA GAS