The Sharp GF-1740 is a small late-1970s mono boombox / radio-cassette recorder from Sharp. It belongs to the early GF-series “Searcher” era, before the huge stereo Sharp boomboxes became famous. Description Portable mono radio + cassette recorder AM/FM/LW depending on version (GF-1740H included long wave) Single 10 cm speaker Runs on AC power or 4× R20/D batteries Telescopic antenna Headphone output and DIN line connection Auto-stop cassette mechanism Early compact “mini boombox” design in silver/gray plastic The model was manufactured around 1978, with some regional variants sold in Europe and Asia. Type Portable radio cassette recorder Audio Mono Radio bands FM / MW, some versions also LW Speaker 10 cm dynamic speaker Power AC 110–220V or 4× D batteries Output power About 2W max Weight Around 1.9 kg Size Approx. 30 × 20 × 9 cm Era Late 1970s