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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





Dual CT 1740



Specifications
(German Industrial Standard DIN 45 500 for Hi Fi  stereo home studio equipment)
WaveBand
FM Band : 87,5 - 104 MHz
AM Band : 513 -1602 kHz
Sensitivity
FM Mono (75 Ω, S/N ratio 26 dB) : 0,6 µV
FM Stereo(75 Ω, S/N ratio 26 dB) : 1,8 µV
FM Stereo (75 Ω, S/N ratio 46 dB) : 18 µV
AM (according to DIN 45 300, S/N ratio 6 dB) : 15 µV
Automatic Mono/Stereo Switchover Adjusting Range:  10 - 280 µV
Mutin Control (can be switched off, variable range):  10 - 230 µV
Limiter Operating Point -3 dB:  0,5 µV
Signal-to-Noise Ratio (weighted)
Mono (related to 1 kHz /40 kHz deviation) : 63 dB
Stereo (related to 1 kHz/46 kHz deviation) : 63 dB
Signal-to-Noise ratio (unweighted)
Mono (related to 1 kHz/40 kHz deviation):  60 dB
Stero (related to 1 kHz/46 kHz deviation):  60 dB
Pilot-tone-attenuation (measured via low-pass filter):  65 dB
Harmonic Distortion
Mono (measured 1 kHz/4 kHz deviation) : 0,3%
Stereo (measured 1 kHz/4 kHz deviation) : 0,3%
Channel Separation (at 1,000 Hz):  40 dB
Af Frequency Response (for 50 µs preemphasis -1,5 dB):  20 hz - 15 kHz
IF Bandwidth -3 db:  140 kHz
Selectivity:  85 dB
Image Rejection (Fe + 2 ZF):  75 dB
Spurious Signal Rejection (Fe + ZF₂):  100dB
Antenne
FM : 60/75 and 240/300 ohm impedance
AM : High impedance (inductive)
Dimensions (W x H x D):  40 x 150 x 365 mm
Weight:  7,8 kg
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