New-Old-Stock (NOS) tube. Also known by US military identifier VT-107B. The 6V6GT is a beam-power pentode designed for use in the audio frequency power output stage of television and radio receivers. In this application, it is capable of supply high power output with high sensitivity, high efficiency, and low third and higher-order harmonic distortion. The 6V6GT may also be used as a triode-connected vertical-deflection amplifier in television receivers.