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UHER SG 631 LOGIC

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Technic details

Specifications

Type:
Tape Recorder
Track System:
4-track / 2-track stereo
Tape Speeds:
19.05 cm / s, 9.5 cm / s, 4.75 cm / s
Counter:
4-digit, with zero reset button and automatic foil shut-off device
Reel Size:
27cm (10.5”)
Motors:
For Capstan drive - Collector less, electronically controlled motor x 1
For Reel drive - D.C. hub motor x 2
For Forming - Servo motor x 1

Input Sensitivity / Impedance:
0.1 - 80mV / 2kΩ (Microphone)
1 - 200mV / 20kΩ (Radio)
80mV - 8V / 68kΩ (Line)
Output Level / Impedance:
Approx. 750mV / 15kΩ (Radio)
Approx. 750mV / 15kΩ (Monitor)
1.7V / 120Ω (Headphones)
Power Amplifiers:
Stereo headphones power stage with volume control
Record Level Indication:
Moving-coil peak-reading meter
Overall Frequency Response:
20Hz to 10kHz (4.75 cm / s)
20Hz to 16kHz (9.5 cm / s)
20Hz to 25kHz (19.05 cm / s)
Harmonic Distortion (At 333Hz and 19 cm / s):
Better than 60dB
Crosstalk (At 1kHz in Stereo Operation):
Better than 45dB
Crosstalk (At 1kHz in Two-Direction Stereo Operation):
Better than 60dB
S / N Ratio (4-track / 2-track, Ref 0dB, Unweighted):
19.05 cm / s - 56dB / 58dB
9.5 cm / s - 55dB / 57dB
4.75 cm / s - 53dB / 54dB
S / N Ratio (4-track / 2-track, Ref 0dB, “A” Weighted):
19.05 cm / s - 65dB / 68dB (DIN)
9.5 cm / s - 64dB / 67dB (DIN)
4.75 cm / s - 63dB / 67dB (DIN)
Wow and Flutter:
Max. 0.05% (19.05 cm / s)
Max. 0.1% (9.5 cm / s)
Max. 0.2% (4.75 cm / s)
Max. Speed Deviation (Mid-Spool at 19 cm / s):
±1.5%
Adjustable to 0% with fine regulator; Stroboscope discs 50Hz and 60Hz for optical control
Erasure:
Better than 72dB
Bias and Erasure Frequency:
100kHz
Attenuating Effect on One Track upon Erasure of Other:
Less than 1dB (At 15kHz, 19 cm / s)
Semiconductors used:
Transistors x 111 (Including 13 FET’s)
IC’s x 19
Diodes and Rectifiers x 143

Power Supply:
AC 110 / 130V, 220 / 240V, 50 / 60Hz
Dimensions (W x H x D):
510 x 400 x 146mm
Weight:
13kg

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