Aurex ST-320
¥ 34,800 (around 1976)
Commentary
FM/AM tuner designed to achieve wide-range low-distortion reproduction without loss of sensitivity.
The front-end section uses a FM3 series varicon and FET to increase sensitivity. The mid-frequency section, which affects sound quality, uses a high-performance IC to reduce phase advance and delay while flattening group delay characteristics.
The stereo demodulation circuit uses a PLL IC that improves the performance and stability of the LC circuit.
Uses a low-pass filter that does not adversely affect the frequency characteristics.
This filter reduces residual carriers, which adversely affect the frequency range.
A 2-meter configuration with independent signal and tuning is adopted.
The input selector is equipped with an FM muting switch.
Equipped with two output terminals, fixed and variable.
Equipped with power indicator and stereo indicator.
Equipped with a panel handle that makes it easy to put in and take out the rack.
Model Rating
Type | FM/AM Tuner |
Circuit system | Superheterodyne system |
FM Tuner Section | |
Receiving frequency | 76 MHz to 90 MHz |
Practical sensitivity | 1.9 μ V (IHF) |
Harmonic distortion factor | stereo:0.3% mono:0.2% |
Signal-to-noise ratio | stereo:68dB mono:73dB |
Frequency characteristic | 30 Hz to 15 kHz ± 1 dB |
Effective selectivity | 65dB |
Image interference ratio | 55dB |
IF interference ratio | 80dB |
Capture ratio | 1.0dB |
Spurious interference ratio | 80dB |
AM suppression ratio | 50dB |
Stereo separation | 40dB(1kHz) |
Rated output | Variable : 0 ~ 600 mV |
Antenna terminal | 300 Ω balanced, 75 Ω unbalanced |
<AM Tuner Section> | |
Receiving frequency | 525 kHz to 1,605 kHz |
Practical sensitivity | 250 μ V/1m (IHF) |
Image interference ratio | 40dB |
IF interference ratio | 40dB |
Signal-to-noise ratio | 45dB |
Selectivity | 25dB |
<General> | |
Semiconductor used | Transistor : 10 FET : 1 Diode : 9 pcs LED : 2 pcs IC : 2 |
Power supply voltage | 100 VAC, 50Hz/60Hz |
Power consumption | 8W |
External dimensions | Width 400x Height 146x Depth 318 mm |
Weight | 6.1kg |