YAMAHA TX-500
¥ 34,800 (released in 1987)
Commentary
FM/AM digital tuner with direct PLL tuning method.
It is equipped with a newly developed multi-color LCD by metal mask system.
The transmission efficiency of the light-emitting element is improved by realizing 0 light leakage to the non-illuminated part and infinite high contrast with the illuminated part, and the viewing angle is also expanded beyond conventional LCDs.
The display functions include a signal quality meter with station frequency, preset channel, and 24-segment bar display, an IF mode graphic display with initial selectivity characteristics, and various operation status displays.
Preset memories range from general station frequency only memories to more practical 3-way multi-state memories including reception conditions.
Three reception modes (stereo mode, high blend mode and IF mode) can be stored together with the station frequency. Once stored, the desired station can be called up at any time with comfortable sound quality.
Equipped with FM/AM20-station random access preset.
You can call up the desired FM or AM station with one touch operation without changing the band. Moreover, the preset keys are 1-key / 2-state, and you can preset up to two stations for one key, so you can preset up to a total of 20 FM/AM stations with 10 keys.
Equipped with manually selectable IF band selector switch, AUTO/MANUAL tuning mode selector switch, AUTO STEREO/MONO mode selector switch and high blend switch.
Equipped with AM loop antenna.
Model Rating
| Type | FM/AM digital tuner |
| FM Tuner Section | |
| Practical sensitivity | Mono : 0.8 μ V (9.3 dBf) / 75 Ω |
| S/N ratio 50 dB sensitivity | Mono : 1.55 μ V (15.1 dBf) / 75 Ω Stereo : 21 μ V (37.2 dBf) / 75 Ω |
| Capture ratio | 1.5dB(WIDE) |
| Image interference ratio | 60dB |
| IF interference ratio | 100dB |
| Spurious interference ratio | 80dB |
| AM suppression ratio | 55dB |
| Effective selectivity | 85dB |
| Signal-to-noise ratio | mono:82dB stereo:76dB |
| Total harmonic distortion factor | Stereo : 0.07% (WIDE, 1 kHz) |
| Stereo separation | 52dB(1kHz) |
| Frequency characteristic | 30 Hz to 13000 Hz, ± 0.5 dB |
| <AM Tuner Section> | |
| Effective selectivity | 250 μ V/m |
| Image interference ratio | 40dB |
| Spurious interference ratio | 50dB |
| Signal-to-noise ratio | 50dB |
| Total harmonic distortion factor | 0.3% |
| <General> | |
| Pwer | AC100V 50/60Hz |
| Power consumption | 10W |
| External dimensions | Width 435x Height 92.5x Depth 282.5 mm |
| Weight | 3.1kg |