Sony ST-YX7 (1981)

A compact FM/AM tuner with microcomputer control and quartz-locked synthesis, released in 1981.

Overview

The Sony ST-YX7 is an FM/AM tuner released in 1981. It features quartz lock synthesizer reception and microcomputer-controlled operation, offering precise tuning and ease of use. The unit includes six preset stations for both FM and AM bands, with auto or step tuning modes. A 5-point LED signal indicator and a Stereo/Mute switch are provided for monitoring and control. Built with a die-cast body, it emphasizes durability and stability. The tuner comes with a station name display card and is noted for improved signal-to-noise performance through a newly developed IC in the FM section.

Specifications

Design

The ST-YX7 uses a quartz lock synthesizer for stable reception and microcomputer control for operational precision. It features a die-cast body for structural rigidity and reduced vibration. The FM section includes a newly developed IC to improve signal-to-noise ratio. The front panel includes a 5-point LED signal strength indicator and a Stereo/Mute switch. Six preset memories are available for each of FM and AM, with tuning selectable between auto and step modes.

Market

The Sony ST-YX7 was originally priced at ¥40,000 in Japan and $220 in the US in 1984. It is currently listed in the secondary market as an "absolute rarity" and often described as fully functional with good to very good condition. Original service manuals, including schematic diagrams and repair information, are available through multiple sources, aiding in maintenance and restoration.

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