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1 X 5U4GB GENERAL ELECTRIC TUBE. NEW OLD STOCK IN ORIGINAL BOX.
BRAND: GENERAL ELECTRIC. 1960 PRODUCTION.
GREY PLATES, RECTANGULAR SIDE GETTER.
TESTED IN FUNKE W20 TUBE TESTER:
MINIMUM GOOD EMISSION = 60% = 80mA
190/154 mA EMISSION (EM)