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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





Sony TC-252 reel-to-reel


The Sony Model TC-252 is a four-track stereophonic/monophonic tape recorder for accurate-recording and playback, featuring built-in amplifiers and lid-integrated stereo speakers.

Special features are:
Vibration free motor
All-silicon transistor for exceptional low noise and distortion
Scrape flutter filter which eliminates undesirable tape modulation distrtion
Automatic sentinel shut-off and retractable pinch roller.
This model operates in either vertical or horizontal position and features dual VU meters for easy to read and the reel capacity is 7-inch.
Sound-on-sound facility of the TC-252 permits composite recording from left channel to right channel and vice versa with its selector switch. Sound with sound and public address are also featured.

Specifications
Track System:  4-track stereo and mono
Reel Size:  7" 918 cm) maximum
Tape Speed:  7-1/2 ips, 3-3/4 ips and 1-7/8 ips (19 cm/s; 9,5 cm/s; 4,8 cm/s)
Recording Time (with 1,800 ft tape)
4-track Stereo
7-1/2 ips (19 cm/s) :  1,5 h
3-3/4 ips (9,5 cm/s) :  3 h
1-7/8 ips (4,8 cm/s) :  6 h
4-track Mono
7-1/2 ips (19 cm/s) :  3 h
3-3/4 ips (9,5 cm/s) :  6 h
1-7/8 ips (4,8 cm/s) :  12 h
Frequency Response
7-1/2 ips (19 cm/s) :  30 - 18,000 Hz
3-3/4 ips (9,5 cm/s) :  30 - 13,000 Hz
1-7/8 ips (4,8 cm/s) :  30 - 7,000 Hz
Signal-to-Noise Ratio:  50 dB or more
Wow and Flutter:  less than 0,12% at 7-1/2 ips (19 cm/s)
Power Output:  4 W max. Per channel
Recording Bias
Frequency :  approx. 85 kHz
Inputs: 
Two Mic Inputs Sensitivity/Impedance:  0,19 mV (-72 dB) / 600 Ω
Two Aux Inputs Sensitivity/Impedance:  60 mV (-22 dB)/ 100 k Ω
Outputs:
Two Line Output Level/Impedance :  0,39 V (-6 dB) / 100 k Ω
Two Speaker Outputs Level/Impedance:  2,7 V (+11 dB) / 8 Ω load
Phone Output level/Impedance:  30 mV (-28 dB) / 8 Ω
Speaker:  two 5" (130 mm) dynamic speakers
Voice coil Impedance:  8 Ω
Semiconductors:  20 Transistors; 3 Diodes
Power Requirements/ Consumption:  117 V AC 60 Hz / 45 W
Dimensions (W x H x D):  408 x 256 x 380 mm (16-1/16" x 10-1/8" x 15")

Weight:  13,5 kg (29 lb 11 oz)
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