An Electronic Multicoupler and Antenna Amplifier for the VHF-Range

A single-stage distributed amplifier for the frequency range from 25 to 223 Mc/s may be used as an antenna amplifier for compensation of cable-attenuation or, in connection with a divider network, as a multicoupler for feeding six receivers from a common antenna. Singlestage amplification results in not only low noise level due to the parallel tube circuitry employed but also in a low cross-modulation figure. Second order distortions are minimized by special push-pull operation without doubling the number of tubes. Another advantage of the distributed amplifier is its reliability, which is further improved by dividing the power supply into two independent sections.