High gain pentode originally designed for use in television receivers and released under the type number 1852. Manufacturer: Radio Corporation of America, Harrison, NJ, USA.
Were renamed 6AC7 and adopted for use in radar and other military applications during World War Two (1939-1945). The VT-112 designation indicates that this example was manufactured for military use relatively early in the war.
6.3 volt indirectly heated cathode.
Metal bulb on octal base.
Bulb: S4E/(RCA logo)/U.S.A./VT-112/6AC7/1852
Type of item
64 mm (Length), 38 mm (Outside Diameter)