Technics SA-222
¥ 79,800 (released in 1981)
Commentary
FM/AM stereo tuner amplifier that combines a 30W + 30W amplifier and a quartz synthesizer tuner.
The tuner section uses a quartz synthesizer system with an emphasis on waveform transmission characteristics. The front end consists of an electronic tuning circuit with a proprietary IC and a junction FET to improve the IM interference ratio rejection capability.
By using three ceramic filters in the IF stage, high selectivity and low distortion factor have been obtained.
Excellent sound quality is obtained by setting the reference frequency to 25 kHz, which is outside the audio band.
A unique swallow in counter system eliminates spurious interference from within the broadcast band.
7-station FM/AM preset is available.
In addition, it is equipped with functions such as auto-scan / manual switching and last one memory.
The amplifier section has a simple circuit configuration of two ICs and one transistor.
Low distortion and low noise design using IC is adopted for the equalizer.
Equipped with two types of tape terminals.
Equipped with a subsonic filter.
The tone control is a center defeat type.
Equipped with an FM muting switch.
Model Rating
| Type | FM/AM Receiver |
| Amplifier Unit | |
| Effective power | 30W + 30W (8 Ω, 20 Hz to 20 kHz) |
| Total harmonic distortion factor | 0.04% (20 Hz to 20 kHz at Rated Output) |
| Damping factor | 30 (8 Ω) |
| Input Sensitivity / Impedance | Phono : 2.5mV/47k Ω Tuner, Aux/TV, Tape : 150mV22k Ω |
| Signal-to-noise ratio | Phono:80dB |
| Frequency characteristic | Phono : RIAA standard curve ± 0.8 dB Tuner, Aux/TV, Tape : 5 hz to 70 khz -3dB |
| Tone control | Bass : ± 10 dB (50 Hz) Treble : ± 10 dB (20 kHz) |
| Load impedance | Main or remote : 4 Ω ~ 16 Ω Main + remote : 8 Ω ~ 16 Ω |
| FM Tuner Section | |
| Receiving frequency | 76.1 mhz to 89.9 mhz |
| Practical Sensitivity (75 Ω) | 10.8 dBf (1.9 μ V, IHF' 58) |
| SN ratio 50 dB sensitivity | Stereo : 38.3 dBf (45 μ V, IHF' 58) |
| Distortion factor | mono:0.15% |
| Signal-to-noise ratio | mono:75dB |
| Frequency characteristic | 20 Hz to 15 kHz + 1-2 dB |
| Effective selectivity | 70dB |
| Capture ratio | 1.2dB |
| Image interference ratio | 60dB(83MHz) |
| IF interference ratio | 80dB(83MHz) |
| Spurious interference ratio | 80dB(83MHz) |
| AM suppression ratio | 55dB |
| Stereo separation | 45dB(1kHz) |
| Antenna terminal | 75 Ω Unbalanced Type |
| <AM Tuner Section> | |
| Receiving frequency | 522 kHz to 1611 kHz |
| Practical sensitivity | 30 μ V, 300 μ V/m |
| Selectivity | 55dB |
| Image interference ratio | 50dB(999kHz) |
| IF interference ratio | 40dB(999kHz) |
| <General> | |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption | 98W |
| External dimensions | Width 430x Height 120x Depth 300 mm |
| Weight | 6.5kg |