Technics ST-8075(75T)
¥ 42,800 (around 1977)
Commentary
FM/AM tuner paired with Integrated DC Amp 75A.
In the front-end section, the influence of Radio noises is reduced by two stage amplification using two dual-gate junction FETs with excellent high-frequency characteristics, and by inserting a frequency-straight-line FM-4 series variable capacitor into the RF-stage.
Three ceramic filters with excellent group delay characteristics are used for the selection elements of the IF stage.
The MPX section employs an MPX demodulation circuit using a PLL-IC, which cuts 19 kHz pilot signal and 38 kHz subcarrier to -60dB, providing broadband and low-waviness characteristics.
Moreover, flat characteristics are obtained by using a low-pass filter in the latter stage of the MPX circuit with basic consideration of the Cebi Czech type.
Model Rating
| Type | FM/AM Tuner |
| FM Tuner Section | |
| Receiving frequency | 76 MHz to 90 MHz |
| Practical sensitivity | 0.9 μ V (75 Ω) / 10.3 dBf (New IHF) |
| Distortion factor (100% modulation) | mono:0.15% stereo:0.3% |
| Signal-to-noise ratio (new IHF) | mono:75dB |
| Frequency characteristic | 20 Hz to 15 kHz + 0.2 -0.8 dB |
| Effective selectivity | 75dB |
| Capture Ratio (IHF) | 1.0dB |
| Image Interference Ratio (83 mhz) | 80dB |
| IF Interference Ratio (83 MHz) | 95dB |
| Spurious interference ratio (83 MHz) | 90dB |
| AM suppression ratio | 55dB |
| Stereo separation | 45dB(1kHz) 35dB(10kHz) |
| Leak carrier | -60dB (19 kHz, 38 kHz) |
| <AM Tuner Section> | |
| Receiving frequency | 525 kHz to 1605 kHz |
| Sensitivity (S/N = 20 dB) | 30 μ V |
| Selectivity | 25dB |
| Image interference ratio (1,000 kHz) | 45dB |
| IF disturbance ratio (1,000 kHz) | 40dB |
| <General> | |
| Output voltage | Variable : 0 to 0.8 V |
| Recording level check out | 440 Hz, 50% modulation component |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Power consumption | 12W |
| External dimensions | Width 450x Height 140x Depth 304 mm |
| Weight | 6.7kg |