Technics ST-9700
¥ 250,000 (around 1975)
Commentary
An FM stereo tuner equipped with a 9-row varicon dedicated to FM.
It achieves input resistance without saturation even at input 140 db (= 10 v).
It is equipped with Technics original servo tuning system which compensates for frequency shift and tuning shift.
The MPX section is equipped with an MPX demodulation circuit using a double PLL system to realize excellent frequency characteristics.
The low-cut filter is designed to operate when the tuning knob is touched to prevent shock sound during detuning.
Model Rating
| Type | FM stereo tuner |
| Receiving frequency | 76 MHz to 90 MHz |
| Sensitivity | 1.2 μ V (75 Ω) |
| Selectivity | 85dB |
| Capture ratio | 1.0dB |
| Image interference ratio | 140dB(82MHz) |
| IF interference ratio | 140dB(82MHz) |
| Spurious interference ratio | 140dB(82MHz) |
| AM suppression ratio | 60dB |
| SN ratio (400 Hz, 100% modulation) | 80dB |
| Frequency characteristic | Variable : 5 Hz to 18 kHz Fixed : 5 Hz to 15 kHz + 0.2 -0.8 dB |
| Separability | 45dB(1kHz) 35dB(10kHz) |
| Leak carrier | Variable:-70dB(19kHz) Fixed : -70dB (19 kHz, 38 kHz) |
| Output voltage | Variable : 77 mV to 1550 mV Fixed:770mV |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Power consumption | 30W |
| External dimensions | Width 450x Height 173x Depth 373 mm |
| Weight | 12.1kg |