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2 X ECC85 TUBE. NEW OLD STOCK.
BRAND: MARCONI. 1960s SPANISH PRODUCTION.
GREY PLATES, HALO GETTER, COPPER RODS, HIGH GAIN, MATCHED PAIR.
TESTED IN AMPLITREX AT1000 TUBE TESTER:
158/206% EMISSION (EM) 128/146% TRANSCONDUCTANCE (GM) 1.0/1.1mA GAS
168/196% EMISSION (EM) 138/148% TRANSCONDUCTANCE (GM) 1.8/1.8mA GAS