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2 X ECC81 MULLARD TUBE. NEW OLD STOCK.
BRAND: MULLARD. 1960s PRODUCTION. B-CODES.
GREY PLATES, HALO GETTER, MATCHED PAIIR.
TESTED IN ROEHRENTEST TUBE TESTER:
104/84% mA EMISSION (EM) 4.84/3.89mA/V TRANSCONDUCTANCE (GM)
94/84% mA EMISSION (EM) 4.89/5.04mA/V TRANSCONDUCTANCE (GM)