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2 X 5963 TUBE. NEW OLD STOCK.
BRAND: HEWLETT PACKARD. 1960s SYLVANIA PRODUCTION.
17MM GREY PLATES, HALO GETTER, COPPER RODS, MATCHED PAIR.
TESTED IN ROEHRENTEST TUBE TESTER:
111/111% 7.791/7.791mA EMISSION (EM)
104/106% 7.296/7.446mA EMISSION (EM)
CH167U1