The 6CW4 Nuvistor from RCA is a triode for use at VHF and built into a small metal case. The base is ceramic sealed to the metal case and five fine pins, on a 12 pin grid, form the connections and the electrode supports internally.
The Nuvistor is built as a series of co-axial electrodes but they are all very small, and small inter electrode capacitances result. Thus the high frequency of operation. Unlike the transistors of the time the Nuvistor had the overload and intermodulation characteristics of the valve, superior to the transistor.
The thin metal tube envelope is 10 mm in diameter and, excluding the fine base pins, is the 20 mm tall.
Reference: Data-sheet. Type 6CW4 was first introduced in 1960.
Absolute Maximum Operating Conditions¶
Updated March 27, 2017. shape:nuvistor construction:disc.seal.(ceramic) type:triode age:1960.1975 base:twelvar heater:6.3v pins:5 pin:2.a pin:4.g1 pin:8.k pin:10.h pin:12.h