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4 X 6J7GT TUBE. NEW OLD STOCK IN ORIGINAL BOX.
BRAND: MULLARD. 1960s PRODUCTION.
BLACK PLATES, RECTANGULAR GETTER, QUAD.
TESTED IN ROEHRENTEST TUBE TESTER:
144% 2.87mA EMISSION (EM)
134% 2.69mA EMISSION (EM)
151% 3.01mA EMISSION (EM)
122% 2.44mA EMISSION (EM)
