Performance of "Low-plate-potential" tube types at mobile-communications frequencies

The demonstrated advantages for hybrid-type automobile broadcast receivers of "low-plate-potential" tube types (those designed to operate at plate potentials of approximately 12 volts) has aroused considerable interest in the usefulness of such tube types at mobile-communications frequencies. This paper analyses the performance of low-plate-potential tube types at frequencies above 2 mc. It also discusses performance requirements and design considerations for mobile-communications receivers and presents operating data on an experimental hybrid-type mobile-communications receiver using available low-plate-potential tube types. These data are compared with typical receiver-performance specifications for mobile service.