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

Sansui Model 220

 Similar to the Sansui Model 250 in size, looks and performance characteristics, this model features an additional radio band in place of a multiplex circuit.
It is ideal for places where stereo broadcasting facilities are not available. In addition to regular AM and FM bands, the Model 220 offers worldwide radio pick-up capabilities with a shortwave band frequency range from 3,5 to 10 MHz.
Compact with 12 tubes, two transistors and six diodes. Special FM AFC control for stable FM reception, tape monitor, mode, loudness and noise filter controls.
This model has also been provided with a multiplex terminal for fast and convenient connection with a multiplex adaptor if desired.
Amplifier Section
Music Power (IHF):  22 watts ±1 dB
Continuous Power:  10 / 10 watts ±1 dB
Harmonic Distortion:  less than 1% at rated output
Power Bandwidth (IHF):  35 - 15,000 Hz
Input Sensitivity: 
Phono :  3 mV
Aux :  150 mV
Tape Monitor :  660 mV
Hum and Noise (IHF):
Phono :  65 dB
Aux :  70 dB
Output Impedance:  8 Ω and 16 Ω
FM Tuner Section
Frequency Range:  88 - 108 MHz
Sensitivity:  2,5 µV (S/N 20 dB quieting)
Sensitivity:  4,0 µV (IHF)
MW Tuner Section
Frequency Range:  535 - 1605 kHz
Sensitivity (IHF):  30 µV  ±3db
SW Tuner Section
Frequency Range:  3,5 - 10 MHz
Sensitivity (IHF):  40 µV ±3 dB
Seminonductors:  2 Transistors ; 6  Diodes
Tubes :  12
Power Voltage:  100, 117, 220 and 240 V;  50/60 Hz
Power Consumption:  106 VA max
Dimensions (W x H x D):  17-3/8 x 5-5/32 x 12-19/32 inch
Weight:  27,1 lbs

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