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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-270 reel-to-reel

The Sony Stereo Tape-recorder TC-270 is a complete stereo tape recorder. This compact, powerful stereo music system consists of an amplifier utilizing Sony silicon transistors, precision tape deck and high performance speaker systems.
The tape transport mechanism, including vibration-free motor, is designed to provide flutter-free, stable tape drive either in vertical or horizontal operation.tape modulation distortion noise is remarkably reduced by the scrape filter.
Other features are; automatic shut-off device, retractomatic pinch roller for easy tape threading, the professional recording techniques of Sound-to-Sound, built-in reel locks and many more.

Specifications:
Tape Speed:  7-1/2, 3-3/4, 1-7/8 ips
Recording Time:  1,5 hours total at 7-1/2 ips, stereo recording with 1,800 ft tape
Reels:  7" or smaller
Semiconductors:  18 transistors; 4 diodes
Recording System:  4-track stereo or monaural
Heads:  1 x Record/Playbak head;  1 x Erase head
Signal-to-Noise Ratio:  50 dB
Distortion:  3%
Frequency Response [NAB / DIN] : 
7-1/2 ips ;  30 - 18,000 Hz / 30 -16,000 Hz
3-3/4 ips ;  30 - 13,000 Hz / 40 -12,500 Hz
1-7/8 ips :  30 - 7,000 Hz / -
Wow and Flutter [NAB / DIN}:
7-1/2 ips;  0,12 % / 0,18%
3-3/4 ips :  0,15% / 0,25%
1-7/8 :  0,2% / -
Inputs:
Microphone Inputs
Sensitivity :  -72 dB (0,2 mV) / accept low impedance microphones
Line Inputs
Sensitivity :  -22 dB (0,06V)
Impedance:  160k Ω
Outputs
Line Outputs
Outputs level :  -5 dB (0,43 V)
Load Impedance more than 10 k Ω
Speaker Outputs
Load Impedance :  8 Ω
Headphone Output
Accapts an 8 Ω stereo headphone
Record/Playback Connector
Input Impedance :  3,9 k Ω
Output Impedance :  80 0hm
Power Requirement:  AC 220 V, 50 Hz; AC 110,127, 220, 240 V , 50/60 Hz
Power Consumption:  AC 55W
Dimensions (W x H x D):  513 x 260 x 387 mm
Weight:  16,5 kg (36 lb 6 oz)


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