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 has quartz lock synthesizer reception and microcomputer-controlled operation. There are six preset stations for each of the FM and AM bands, with auto or step tuning. A 5-point LED signal indicator and a Stereo/Mute switch handle monitoring and control. The body is die-cast, which Sony pitched as a durability and stability feature. A station name display card comes with the tuner. A newly developed IC in the FM section improves signal-to-noise performance.

Specifications

Design

The ST-YX7 uses a quartz lock synthesizer for stable reception and microcomputer control for precise operation. The die-cast body gives it structural rigidity and reduces vibration. The FM section has a newly developed IC to improve signal-to-noise ratio. On the front panel you get a 5-point LED signal strength indicator and a Stereo/Mute switch. Each of FM and AM has six preset memories, and tuning can be set to auto or 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 on the secondary market as an "absolute rarity," and listings often describe it as fully functional, in good to very good condition. Original service manuals, with schematic diagrams and repair information, are available from multiple sources.

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