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Technics RS-690U

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Technic details

Specifications

Type:
Stereo cassette deck
Track System:
4-track, 2-channel stereo
Tape Speed:
4.8 cm/s
Head configuration:
For recording - HPF
For playback - HPF
For erasing - Double gap ferrite

Used motors:
For capstan drive - DD motor x 1
For Reel drive - Coreless motor x 2
Tape Type:
Type I
CrO2
Noise Reduction:
Dolby B
Frequency characteristics:
20Hz to 18kHz (Type I tape)
20Hz to 20kHz (CrO2 tape)
S / N ratio:
55dB (Dolby B Off)
5dB or more 10dB improvement (Dolby B On)
Wow and flutter:
0.04% (WRMS)
Input sensitivity / impedance:
Mic - 0.25mV (-72dB) / 400Ω to 20kΩ
Line - 60mV (-24dB)
Output level / impedance:
Line - 420mV (-7.5dB) / 47kΩ or more
Headphone - 0 to 900mV / 8Ω
Semiconductor used:
Transistors - 141 pieces
FET's - 6 pieces
IC's - 6 pieces
Diodes - 94 pieces
Other semiconductors - 16 pieces
Optional:
Wireless Remote Control Unit RP-070 (¥ 30,000)
Power supply:
AC 100V, 50 / 60Hz
Power consumption:
About 40W

Dimensions (W x H x D):
Amplifier section - 480 x 173 x 375mm
Transport section - 480 x 193 x 375mm
Weight:
Amplifier - About 8.5kg
Transport section - About 13.5kg
Year:
Around 1976

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