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

Heathkit AJ-32

 Enjoy Complete Listening With This Top-Value Heathkit AM/FM/FM Stereo Tuner in One Compact Unit at Low Cost.
Just a flick of a switch and you're up-to-the-minute with the latest news, sports, and music of Am; or the relaxing, quiet beauty of FM or FM Streo.
Added Performance at Traditional Heathkit Savings.
In addition to the features listed opposite, enjoy the "added performance" of complete controls; the AM fidelity switch that selects desired bandwidth for maximum selectivity or fidelity; level controls that adjust to suit your amplifier; built-in AM and FM antennas plus outside terminals; and effortless flywheel tuning.
Bulit-in multiplex converter
FM Stereo Indicator Light
Variable AFC for drift-free reception
2 bar-type "Eye" tuning indicators
Stereo Phase Control for minimum distortion, maximum separation
Filtered stereo tape recorder outputs
 Matches The AA-151 In Stiling, Performance.
Handsomely housed in a sturdy steel cabinet clad in attractive tan vinyl with a charcoal gray front panel and polished trim, matches the AA-151.

Easy Assembly
The tuning unit is preassembled, prealigned fro quick, simple construction.
AM Section
Tuning Range:  550 - 1600 kHz
Intermediate Frequency:  455 kHz
Usable Sensitivity (Normal position): 
1400 kHz - 10 microvolts (20 dB of quieting);
1000 kHz - 15 microvolts (20 dB of quieting);
600 kHz - 400 microvolts (20 dB of quieting)
IF Bandwidth:
Normal :  6 dB - 7 kHz
Maximum :  6 dB - 12 kHz
AM Antenna:  Built-in rod antenna with provisions for external  antenna and ground
Output Voltage (750 microvolts -30% mod.):  1 Volt
Image Rejection: 
1400 kHz - 40 dB
1000 Hz - 50 dB
600 kHz - 60 dB
Harmonic Distortion(750 microvolts - 95% Mod.):  less than 1%
Hum and Noise (5000 microvolts, 30% Mod.):  30 dB
IF Rejection:  1400 kHz - 30 dB; 600 kHz - 50 dB
FM Section
Tuning Range:  88 MHz - 108 MHz
Intermediate Frequency:  10,7 MHz
Antenna:  Balanced input for external 300 Ω antenna. Internal line anytenna
Output Voltage (30 microvolts -30% Mod.):  1 Volt
Image Ratio (30 microvolts - 30% Mod. ,98 MHz):  -45 dB
Harmonic Distortion (25 microvolts - 100% Mod. , 98 MHz):  less than 1%
IF Rejection (98 MHz):  -65 dB
FM Audio Response (20 - 20,000 Hz):  ±1 dB
AFC Correction Factor (Full AFC):  100 kHz per volt
AM Suppression:  -27 dB
Hun and Noise (25 microvolt, 30% Mod.):  -48 dB
Quieting Sensitivity:  20 dB - 2 ½ microvolts;
30 dB - 3 ½ microvolts;
48 dB - 30 microvolts (max. Quieting)
FM Stereo Converter Section
Audio Frequency Response:  50 - 15,000 Hz  ±2 dB
Subcarrier Bandpass:  23,000 to 50,000 Hz ±3 dB
Channel Separation;  30 dB or more at 1 kHz; 25 dB or more at 10 kHz
Hum and Noise:  -55 dB relative to 1 volt output
Output Impedance (cathode Follower):  Variable to 4000 Ω, each channel
Outputs:  left and Right channel
Power Requirements: 117 volts, 50/60 Hz 130 watts
Export Model:  available for 115 - 230 V AC, 50/60 Hz
Dimensions (W x H x D):  15¾" x 5¼" x 11"
Weight Kit:  23 lbs

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