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5 X ECL80 TUBE. NEW OLD STOCK IN ORIGINAL BOX.
BRAND: MULLARD. 1950s SIEMENS AND HALSKE PRODUCTION.
GREY PLATES, HALO GETTER, 3 MICA, MATCHED QUINTET.
TESTED IN FUNKE W20 TUBE TESTER:
TRIODE MINIMUM GOOD EMISSION = 60% = 4.8mA
PENTODE MINIMUM GOOD EMISSION = 60% = 14mA
7.2/25mA EMISSION (EM)
7/22.5mA EMISSION (EM)
6.6/21.5mA EMISSION (EM)
6.8/23mA EMISSION (EM)
7.3/25mA EMISSION (EM)
CB406U1
