Aurex ST-550
¥ 60,000 (around 1978)
Commentary
AM/FM two band digital FM/AM tuner announced as a sister machine of ST-440.
Preset tuning is available for 4 FM stations and 6 AM stations.
5-step LED is used for the preset, tuning switch and indicator, and for the indicator that can check the signal input sensitivity.
Model Rating
| Type | FM/AM Tuner |
| Circuit system | AM/FM : PLL digital frequency synthesizer system |
| Selecting station | Auto Tuning (FM) Preset tuning (direct for 6 FM stations and 4 AM stations) |
| FM Tuner Section | |
| Receiving frequency | 76.0 mhz to 90.0 mhz |
| Practical sensitivity | 10.8 dBf (0.9 μ V, 75 Ω) |
| Frequency characteristic | 20 Hz to 15 kHz ± 1 dB |
| Effective selectivity | 60 dB (± 400 kHz) |
| Distortion factor | mono:0.1% stereo:0.2% |
| Signal-to-noise ratio | mono:72dB stereo:68dB |
| Capture ratio | 1.5dB |
| Stereo separation factor | 40dB(1kHz) |
| Rated output | 600 mv (400 Hz, 100%) |
| <AM Tuner Section> | |
| Receiving frequency | 531 kHz to 1602 kHz |
| Practical sensitivity | 300 μ V/m |
| Effective selectivity | 30dB |
| Image interference ratio | 35dB |
| Signal-to-noise ratio | 50dB |
| <General> | |
| Pwer | AC100V 50Hz/60Hz |
| Power consumption | 8W |
| External dimensions | Width 420x Height 57x Depth 292 mm |
| Weight | 3.4kg |