SONY ST-S222ESA
¥ 29,800 (released in 1991)
Commentary
An FM/AM tuner that can receive VHF and UHF TV broadcast audio.
By using a high-speed PLL IC developed by Sony, the comparison frequency of the synthesizer tuner is raised to 100 kHz, which is the same as the reception frequency. The direct comparator method is adopted.
WODSD circuits that produce switching signals that are less likely to generate higher harmonics are installed in order to enhance the interference rejection capability of neighboring stations.
It uses a radial power supply in which each block is placed around the power supply.
The TV sound is compatible with sound multiplex.
You can also play programs in two languages such as English by selecting main / sub / main + sub.
Up to 30 preset memories can be registered at random.
Equipped with functions such as digital tuning and preset scanning by using the tuning knob.
Model Rating
| Type | FM/AM Tuner |
| FM/TV (Audio) Tuner Section | |
| Receiving frequency band | FM : 76.0 MHz to 90.0 MHz VHF : 1-12ch UHF : 13 ch to 62 ch |
| Practical sensitivity | 0.9 μ V (10.3 dBf) |
| Frequency characteristic | 15 Hz to 15 kHz + 0. 2-0. 5 dB |
| Signal-to-noise ratio | mono:80dB stereo:75dB |
| Effective selectivity | 80dB(400kHz) |
| Total harmonic distortion rate (wide, 1 kHz) | mono:0.045% stereo:0.05% |
| Image interference ratio | 55dB |
| Stereo separation | 60dB(1kHz) |
| Antenna terminal | 75 Ω Unbalanced Type |
| <AM Tuner Section> | |
| Receiving frequency band | 522 kHz to 1611 kHz |
| Sensitivity | 250 μ V/m (when AM loop antenna is used) |
| Signal-to-noise ratio | 54dB |
| Total harmonic distortion rate (400 Hz) | 0.3% |
| Selectivity | 40dB(9kHz) |
| Antenna terminal | External antenna terminal |
| <General> | |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption | 14W |
| External dimensions | Width 430x Height 85x Depth 365 mm |
| Weight | 4.0kg |