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MTR-90III Analog Multitrack Tape Recorder
This product has been discontinued.
Features | Specifications
Specifications
Tape Transport
Tape Width & Track2 inches, 24 tracks
HeadsPlug-in head blocks with full access to independent head azimuth adjustment
Motors1 DC capstan motor, 2 fully servoed DC reel motors
Reel SizeUp to 14-inch diameter (35.63 cm). NAB hub with reel size auto sensing
Tape Speeds30 & 15 ips (76.2 & 38.1 cm/s) (or 15 & 7.5 ips (38.1 & 19.05 cm/s), manufactured to order)
Tape Speed AccuracyLess than ±0.1%
Tape Speed DeviationWithin 0.05% (from beginning to end of reel)
Pitch Control±20% continuously variable control, % or ips readout with 0.01% precision
Wow & Flutter
(Peak wtd per DIN 45507)
30 ips = ±0.04%
15 ips = ±0.05%
7.5 ips = ±0.08%
Start & Stop Time
(14" reels)
30 ips = max. 1.0 s
15 ips = max. 0.6 s
7.5 ips = 0.5 s
Drive SystemPinch-Roller-less direct drive capstan system with ±20% speed control. Constant tension servo-controlled reel motors.
Cue ControlCue knob for variable speed tape winding (bidirectional) proportional to knob rotating; button also defeats tape lifters in Fast Wind and Rewind modes.
Tape Time CounterSix-digit LED readout from tachometer/logic measurement circuit; indicates hours, minutes, seconds, and tenths of seconds.
Electronics (measured with AMPEX #456 tape)
Line InputTransformerless active balanced (Floating transformers are optional)
Input Impedance: 10 kΩ (20 Hz to 20 kHz)
Reference Level: +4 dBu
Connector: XL-3 type (female)
Line OutputTransformerless active balanced (Floating transformers are optional), Balanced/Unbalanced switchable
Output Impedance: 5Ω (20 Hz to 20 kHz)
Load Impedance: min. 150Ω
Reference Level: +4 dBu
Connector: XL-3 type (male)
Clipping (amplifier)+28 dBu
Headroom24 dB
EqualizationAES (30 ips), NAB, or IEC (15 & 7.5 ips) switchable. Record EQ to be specified at time of order.
Punch-In/Punch-OutGapless and noiseless inserts with automatic monitor switching.
Frequency Response (Rec/Rep)50 Hz to 22 kHz +2, -3 dB (0 VU, 30 ips)
30 Hz to 20 kHz +2, -3 dB (0 VU, 15 ips)
30 Hz to 16 kHz +2, -3 dB (-10 VU, 7.5 ips)
Frequency Response (Rec/Sel-Rep)50 Hz to 16 kHz±3 dB (0 VU, 30 ips)
30 Hz to 16 kHz±3 dB (0 VU, 15 ips)
30 Hz to 12 kHz±3 dB (-10 VU, 7.5 ips)
Distortion (THD)Less than 0.5% (@ 1 kHz, 320 nWb/m)
Crosstalk (1 kHz)min. 55 dB
Crosstalk (200 Hz to 16 kHz)min. 43 dB
Erase EfficiencyBetter than 75 dB (@ 1 kHz)
Signal-to-Noise Ratio
(@ 1040 nWb/m, UNWTD,
with 30 Hz to 18 kHz BPF)
AES 30 ips = 70 dB
IEC 15 ips = 69 dB, IEC 7.5 ips = 66 dB
NAB 15 ips = 67 dB, NAB 7.5 ips = 69 dB
Reference FluxivityNAB = 250 nWb/m, IEC = "320" nWb/m. Figures enclosed in quotations (" ") represent values for open circuit fluxivity
Bias Frequency257 kHz
Erase Frequency86 kHz
Physical
Weightapprox. 200 kg
Dimensions (H x W x D)1,085 x 770 x 620 mm
FinishLight beige and gray pebble finished steel chassis, black cover panels.
Power Supply Requirement100/117/220/240 V ±10% Single phase AC, 50/60 Hz
Power Consumption1 kVA (norm.), 2,000 VA (max.)
Operating EnvironmentTemperature +5 to +40°C, Relative Humidity 20 to 80%
Storage EnvironmentTemperature -20 to +45°C, Relative Humidity 10 to 80%
Accessories
Standard AccessoriesCB-147-S remote controller
Fuse
VU meter lamp
Switch lamp
Frame bumper
Power supply cable
3 P plug cord
Amplifier control cables
Deck control cable
Dummy EXT connector
Operation and maintenance manual
Optional AccessoriesCB-120S auto locator
CB-120BS auto locator
CB-148-S auto locator
EC-101-S plug-in synchronizer
CB-121-S synchronizer remote controller [for EC-101]
EC-102-S chase synchronizer
CB-131-S synchronizer remote controller [for EC-102]
ZA-55S capstan clock pre-scaller
ZA-52J locator/remote stand
ZA-54L large diameter caster [d = 125 mm]
ZA-53C input transformer assy
ZA-53D output transformer assy
PB-78A externder PCB
ZA-54D spare PCB kit
Specifications are subject to change without notice or obligation.