Aurex ST-320

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