What is stereo?

There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.

H.H. Scott '59

Teac AT-X30

 Teac AT-X30   
AM/FM Stereo Tuner
High-Sensitivity Front End, Dual Meters, FM Auto, PLL MPX Demodulator

High-Sensitivity TEAC Tuner with Clean-Styling Panel
inside and out, the Teac AT-X30 is extra-clean. Its simple panel design is backed by circuitry that assures clean reception of all AM and FM broadcasts. The AT-X30 is also packed with convenience extras like FM Auto stereo with built-in muting function and precise dual-meter tuning system.

Advanced Front End
At AT-X30 front end gives you clean, clear reception of even weak or distant stations. The circuitry, incorporating ll high-quality components, is perfectly balanced formaximum performance under the widest range of reception conditions. A smooth 3-gang tuning capacitor assures maximum frequency-calibration accuracy over the entire reception bandwidth for pinpoint tuning on all stations. The high-quality reception of this unit is further improved by the use of a 2-element ceramic filter in the IF stage.

Low-Distortion MPX Demodulator
A special Phase-Locked Loop (PLL) IC in the FM multiplex demodulator stgae assures ultra-low distortion and superb stereo separation. Providing 38 dB stereo separation, this section assures excellent imaging and clarity in the stereo field. In addition, since the most critical circuitry is incorporated in a single IC chip, greater operation stability and reliability has been achieved.

Three-Way Selector
this easy-grasp knob lets you choose AM or FM Auto for normal listening conditions. When an FM stereo signal is received, the AT-X30 automatically switches to Stereo reception. In particularly difficult reception situations, switching to the Mono position will eliminate most of the background noise from an FM signal. In the FM Auto position, a handy FM muting function is automatically engaged. This feature eliminates annoying inter-station noise while tuning.

Dual Tuning Meters
An outstanding feature for a tuner in this class, the AT-X30
's dual tuning meters let you find the best tuning spot for any station with pinpoint accuracy. The signal-strength of incoming signals; use it to tune both AM and FM stations. For precise FM station alignment, the center-tune meter needle reads dead center when the station is tuned meter needle reads dead center when the station is tuned so that stereo separation is optimum and distortion is minimum.

Other Features
Easy-view linear dial scale - longer for clearer station indication.
Convenient center-panel tuning knob.
High-inertia flywheel-type tuning knob for smooth, accurate tuning with no backlash.
FM Section
Tuning Range: 88 – 108 MHz
Usable Sensitivity: 10,8 dBf/1,9μV
Selectivity: 50 dB (400 kHz)
Image Response Ratio: 60 dB
IF Response Ratio: 70 dB
AM Suppression Ratio: 55 dB
Capture Ratio: 1,0 dB
Harmonic Distortion: 0.3% (Stereo 1 kHz)
Signal-to-Noise Ratio: 70 dB
Stereo Separation: 50 dB (1 kHz)
Frequency Response: 50 Hz – 15 kHz +0,5/-1,5 dB
Antenna Impedance: 300 Ω Balanced; 75 ohms Unbalanced
Output Level/Impedance: 600 mV/ 4,5 k Ω
AM Section
Tuning Range: 535 – 1,605 kHz
Usable Sensitivity: 300 μV/m
Selectivity: 30 dB
Image Response Ratio: 60 dB (1 kHz)
IF Response Ratio: 40 dB (1 kHz)
Output Level: 120 mV/4,5 k Ω
Power Requirements: 100/117/220/240 V AC, 50/60 Hz
Power Consumption: 12W
Dimensions (W x H x D): 410 x 145 x 300 mm (16-1/8” x 5-6/8” x 11-7/8”)
Weight: 5 kg (11 lbs)

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