Sanyo M7700 (1979)

A compact 1979 radio cassette recorder from Sanyo, with AM/FM reception and built-in speakers.

Overview

The Sanyo M7700 is a portable radio cassette recorder released in 1979 by Sanyo Electric Co. Ltd. of Moriguchi, Osaka. It was sold as part of Sanyo's Mini Series and works as a compact "boombox". It has AM and FM broadcast bands, covering 525-1605 kHz and 88-108 MHz respectively. It has two 92mm loudspeakers and a cassette mechanism that records and plays back. One forum calls it a "4 band radio model," but the specifications from Radiomuseum.org confirm only AM and FM. It has two antennas, likely for extended reception, though the exact configuration beyond AM/FM is undocumented.

Design

The M7700 comes in a portable chassis and follows the late-'70s trend of integrated radio-cassette systems designed for personal stereo use. A user describes it as a "compact 'boombox'," and it has dual-speaker output for home or mobile listening.