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Instruction Manual, including circuit, for this 1960s 160m 10W AM/CW transmitter courtesy of Dave Gordon-Smith, G3UUR. Labgear launched this small transmitter in 1964 to compete with the Codar AT5. It was named the 160 Twin because it could be easily detached from its mobile mount to be used in the main station with a mains power supply(E.5142). An unusual feature was its internal antenna change-over relay, which was rarely included in transmitters in the ‘50s and 60s. Labgear offered a range of accessories for the 160 Twin, including a speech compressor(E.5143), microphone(E.5150), 160m mobile receive convertor(E.5144), transistorised mobile power supply(E.5141) and mobile whip antenna(E.5159). I apologise for the quality of the scanned images of the 160 Twin manual, but the quality of the original manual was none too great! -Dave, G3UUR