Sony ST-SA50ES (1997)
An FM/AM stereo tuner from Sony's Elevated Standard (ES) series, released in 1997 with advanced reception circuitry.
Overview
The Sony ST-SA50ES is a stereo FM/AM tuner introduced in October 1997 as part of Sony's ES (Elevated Standard) series. The series was known for high build quality and good audio engineering. The reception system is built to minimize interference, and the tuner handles FM, AM, and AM stereo broadcasts. It has a 30-station random preset function for both FM and AM bands. The Super Area Call feature makes area-based preset selection simple. It can receive audio from VHS1-3 channels, and it supports FM text multiplex broadcasting when connected to the optional CTD-S100 text display unit.
Specifications
| Practical sensitivity | 0.9 μV (10.3 dBf) |
| Frequency characteristic | 15 Hz to 15 kHz +0.2 -0.5 dB |
| Signal-to-noise ratio | mono: 90dB, stereo: 84dB |
| Total harmonic distortion rate (1 kHz) | mono: 0.0098%, stereo: 0.015% |
| Stereo separation wide | 65dB (1kHz) |
| Accessory function | FM/AM 30 station random preset |
| Power | 100 VAC, 50Hz/60Hz |
| Power consumption | 13W |
| External dimensions | Width 430 x Height 97.5 x Depth 355 mm |
| Weight | Approx. 4.0 kg |
Design
The ST-SA50ES has a newly developed active selection mode and a reception circuit designed to reduce high-frequency interference. The PLL circuit with a crystal oscillator sits in a shielded case, and the case is divided inside into isolated blocks to prevent crosstalk. The power supply uses a radial layout. The rectifier circuit is at the center of the rear board, and the surrounding components are arranged crescentically to optimize power distribution. The tuner supports AM stereo with an extended AM frequency band. It also has a detection output terminal for connecting the optional CTD-S100 text display unit.
Context
The ST-SA50ES is part of Sony's ES (Elevated Standard) series. The series was developed to deliver higher performance standards in mass-market audio equipment.
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