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Dokorder 1120

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Technic details

Specifications

Type:
4-Track Stereo/Mono Tape Deck
Recording / Playback system:
4-track 2-channel Stereophonic
4-track 1-channel Monophonic
Tape width:
Standard ¼” tape
Motors:
For Capstan - 4/8 pole hysteresis synchronous x 1
For Reels - 6 pole induction type x 2
Heads:
Recording head x 1
Playback head x 1
Erase head x 1
Reel size:
Up to 10.5” reel
Equalization:
NAB
Bias frequency:
130kHz, ±1kHz
Tape speed:
19 cm / s, ±1% (10.5” or 7” reel)
9.5 cm / s, ±1% (10.5” or 7” reel)
Tape speed accuracy:
±0.5% (19 cm / s, 2985 ~ 3015 by 3kHz Test Tape)
±0.5% (9.5 cm / s, 2985 ~ 3015 by 3kHz Test Tape)
Frequency response:
30Hz to 20kHz, ±3dB (19 cm / s)
30Hz to 10kHz, ±3dB (9.5 cm / s)
Overall (By SCOTCH #212 tape at Bias Special EQ Normal)
Playback level:
+3dB ±1dB at 19 cm / s (700Hz)
+3dB ±2dB at 9.5 cm / s (500Hz)
Wow and flutter (Playback R.M.S.):
19 cm / s (7-1/2 ips) - 0.15% RMS / 0.07% WRMS (10.5” or 7” reel)
9.5 cm / s (3-3/4 ips) - 0.18% RMS / 0.09% WRMS (10.5” or 7” reel)
Fast winding time:
120 sec. for 7” reel (1800-foot tape, 60Hz)
100 sec. for 10.5” reel (2500-foot tape, 60Hz)
S / N ratio:
Better than 50dB (1kHz, Playback)
Better than 48dB (1kHz, Overall)
Crosstalk:
Better than 45dB at 1kHz
Channel separation:
Better than 40dB at 1kHz
Distortion:
Less than 1.5% at 1kHz
Input sensitivity / Impedance:
80mV (-20dB) / 100kΩ (Line)
30mV (-28.5dB) / 80kΩ (DIN)
0,5mV (-70dB) / 600Ω (Mic.)
Output level / Impedance:
1.2V (+3dB Playback, 0dB Source) / 10kΩ (Line)
1.2V (+3dB Playback, 0dB Source) / 10kΩ (DIN)
2mW / 8Ω at 0dB output level (Headphones)
Operation position:
Vertical
Monitoring:
Full tape / source
Level indication:
2 illuminated VU meters and 2 peak indicator lamps
Peak indicator:
Flash on at +8dB
Semiconductors used:
2 x IC’s, 38 x Transistors, 62 x Diodes
Power requirements:
AC 117V, 60Hz (U.S.A. type)
AC 110 / 117 / 125 / 200 / 220 or 240V, 50 / 60Hz (Universal type)
Power consumption:
190W
Dimensions (W x H x D):
430 x 452 x 172mm
Weight:
Approx. 27kg
Year:
1976

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