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Denon DR-750

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Technic details

Specifications

Type:
Vertical cassette tape deck
System track:
4 track 2 channel stereo
Heads:
Recording / Reproducing head (Sendust)
Erase head (Double gap high-density ferrite)
Used motors:
DC coreless motor x 1
DC motor x 1
Table speed:
4.76 cm / s (1-7/8 ips)

Tape speed deviation:
Within ± 0.5%
Fast forward rewinding time:
About 70 sec. with C-60 cassette tape
Recording bias:
About 100kHz (The amount of bias can be adjusted about +5 -65% to CrO2 tape position)
Total S / N ratio:
65dB or more (CCIR wrms) (DOLBY NR switch IN, 1 kHz for chrome tape, 3% THD level)
Total third harmonic distortion rate:
0.9% or less (1kHz with LH tape, reference level 0 VU, 200 pwb / mm)
Overall frequency characteristics:
35Hz to 18kHz, ±3dB (CrO2 tape)
35Hz to 16kHz, ±3dB (LH tape)
Noise Reduction:
Dolby B
Channel separation:
35dB or more (1kHz)
Crosstalk:
65dB or more (1kHz, between isolated tracks)
Wow and flutter:
0.04% wrms or less (JIS)
0.1% rms or less
Inputs:
Microphone - -70dB (Impedance 10KΩ unbalanced VR maximum)
Line - -20dB (Impedance 50KΩ unbalanced VR maximum)
Outputs:
Line - +2dB (1Vrms, 10KΩ load, maximum output VR)
Compatible load impedance - 600Ω or more
Headphones - 1mW (Compatible load impedance 8Ω)
Display:
3-Digıt Mechanical Counter
Analog Needle Meters
Used semiconductors:
Transistors x 74 pieces
IC's x 8 pieces
Diodes x 93 pieces
Light emitting diodes x 2 pieces
Thermistors x 2 pieces
Rectifiers x 2 pieces
Exterior:
Front Loading
Orientation Left
Silver Finish
Accessories:
Head cleaning set x 1
Parallel PIN code x 2

Power supply:
AC 100V, 50 / 60Hz
Power consumption:
38W
Dimensions (W x H x D):
415 × 303 × 226mm
Weight:
About 12.5kg
Year:
1977

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