Technics ST-7700II
¥ 37,800 (around 1977)
Commentary
An FM/AM tuner with realistic playback capability even at 300% modulation.
The front end uses FM4-row varicon and high-frequency 1-stage amplification to minimize the effect of Radio noises with high sensitivity.
The newly developed super linear IC has been incorporated to improve the regenerative capacity in case of overmodulation.
The IF stage is designed with an emphasis on group delay characteristics.
The MPX section is equipped with a PLL / MPX demodulation circuit.
Equipped with a deviation / signal meter that can confirm the degree of modulation.
Model Rating
| Type | FM/AM Tuner |
| FM Tuner Section | |
| Receiving frequency | 76 MHz to 90 MHz |
| Practical sensitivity | 0.9 μ V (IHF' 58) / 10.3 dBf |
| SN ratio 50 dB sensitivity | Mono : 2.0 μ V (IHF' 58) / 17.3 dBf Stereo : 28 μ V (IHF' 58) / 40.2 dBf |
| Total harmonic distortion factor | mono:0.15% stereo:0.3% |
| Signal-to-noise ratio | mono:75dB stereo:70dB |
| Frequency characteristic | 20 Hz to 15 kHz + 0.2 -0.8 dB |
| Selectivity | 75dB |
| Capture ratio | 1.0dB |
| Image Interference Ratio (83 mhz) | 80dB |
| IF interference ratio | 90dB |
| Spurious interference ratio (83 MHz) | 90dB |
| AM suppression ratio | 55dB |
| Stereo separation | 45dB(1kHz) 35dB(10kHz) |
| Leak carrier | -60dB(38kHz) |
| Antenna terminal | Dedicated 75 Ω |
| <AM Tuner Section> | |
| Receiving frequency | 525 kHz to 1605 kHz |
| Practical sensitivity | 30 μ V, 250 μ V/m |
| Selectivity | 20dB |
| Image interference ratio (1,000 kHz) | 45dB |
| IF disturbance ratio (1,000 kHz) | 40dB |
| <General> | |
| Output voltage | Fixed:0.7V |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Power consumption | 9W |
| External dimensions | Width 410x Height 142x Depth 295 mm |
| Weight | 4.6kg |