Note
Allied Radio catalog 1964 (copyright 1963), p. 226.
Sonar expanded on its mono-bander theme with the "Four-Bander" transceiver. It covered 80, 40, 20, and 15 meters. It used the 2.1 kHz Collins filter and had a 100kHz calibrator. Power input was 200 watts PEP SSB and 180 watts CW.