OTARI MX5050 BIII

The direct drive capstan motor is servo-controlled, and an integral microprocessor governs tape handling, including dynamic braking, motion sensing and transport logic. A built-in mini-autolocator provides three one-touch cue-point memories, search zero, and a repeat function. The tape timer display shows tape time in Hrs/Min/Sec., as well as tape speed in inches per second and percentage of tape speed. Capstan speed can be varied by +/- 20% in 0.01% steps using the built-in "pitch" control. Timecode editing using a synchronizer is accomplished via the 37-pin Otari standard parallel interface.

The extremely rugged mechanical construction includes a 1/4" deckplate with cast aluminum side panels and steel support members. All circuit boards are designed to swing out or unplug for quick service access.

 Positive-action transport controls.

Balanced transformerless XLR I/Os.

DC capstan, Quartz PLL servo-controlled.

Built-in mini-autolocator.

Built-in test oscillator and external oscillator input.

Variable pitch control (+/- 20%).

Front panel record setup adjustments.

1/4" deck plate with cast aluminumside panels and steel support members.

SPECS:

Tape Transport
 Track Configuration
 Tape Width: 1/4 inch
BIII-F (Full Track) = Repro (2T) x 1, Erase (FT) x 1, Rec (FT) x 1, Repro (FT) x 1
BIII-2 (2-Track NAB) = Erase x 1, Rec x 1, Repro x 1
BIII-2E (2-Track DIN) = Erase x 1, Rec x 1, Repro x 1

Motor
 Capstan x 1 (DC brushless PLL servo motor)
Reel x 2 (AC Induction Motor)

Reel Size
 max. 10.5 inch NAB

Tape Speed
 High Speed Version: 15 ips/7.5 ips
Low Speed Version: 7.5 ips/3.75 ips

Tape Speed Accuracy
 max. +/-0.2%

Tape Speed Deviation
 max. 0.2%

Wow And Flutter (Peak Weighted per DIN 45507)
 15 ips: max. +/-0.06%
7.5 ips: max. +/-0.08%
3.75 ips: max. +/-0.12%

Start Time (Time required to accelerate to double the specified W&F value)
 15 ips: max. 0.5 s
7.5 ips: max. 0.4 s
3.75 ips: max. 0.3 s

Stop Time (Time to stop from Play mode)
 15 ips: max. 0.5 s
7.5 ips: max. 0.3 s
3.75 ips: max. 0.3 s
Time to Stop from Fast Wind: max. 3 s

Fast Wind Time
 max. 110 s for 2500 ft (50Hz)
or max. 90 s for 2500 ft (60 Hz)
 

Line Inputs
 Mode
 Transformerless Active Balanced

Input Impedance
 100kohm (20Hz to 20kHz)

Nominal Level
 +4dBu

Max. Level
 +30dBu

Connectors
 XLR Female type
 

Mic Input
 Mode
 Transformerless Active Balanced

Input Impedance
 +10kohm

Min. Level
 -70dBu/-50dBu/OFF switchable

Mic. Impedance
 min. 150ohm
 

Line Outputs
 Mode
 Transformerless Active Balanced

Output Impedance
 max. 5ohm (20Hz to 20kHz)

Load Impedance
 min. 200ohm

Nominal Level
 +4dBu/-16dBu switchable

Max. Level
 +26dBu for 200ohm

Connectors
 XLR Male type
 

Phone Output
 Load Impedance
 8ohm

Connector
 1/4" Standard Stereo Phone Jack
 

Electronics
 Equalization
 NAB/IEC Selectable

Standard Reference Flux (*open circuit flux)
 BIII-2, BIII-F: 185/250/320* nWb/m
BIII-2E: 250/320/510* nWb/m

REC/REP Frequency Response
 15 ips: 30Hz to 20kHz +/-2dB
7.5 ips: 30Hz to 18kHz +/-2dB
3.75 ips: 20Hz to 10kHz +/-2dB

REC/SEL-REP Frequency Response
 15 ips: 250Hz to 7.5kHz +/-3dB
7.5 ips: 250Hz to 5kHz +/-3dB
3.75 ips: 250Hz to 2.5kHz +/-3dB

Signal to Noise Ratio (WTD)
Track width = 2mm
 15ips: 73dB (IEC), 72dB (NAB)
7.5ips: 70dB (IEC), 73dB (NAB)
3.75ips: 67dB (IEC), 67dB (NAB)

Total Harmonic Distortion
 max. 0.3% (15 ips 1kHz, 250 nWb/m, AMPEX 456)

Crosstalk
 min. 55dB

Depth of Erasure
 min. 75dB

Test Oscillator
 Sine wave 1kHz/10kHz

Bias Frequency
 133kHz

Erase Frequency
 133kHz
 
 

720.890.0230 e-mail: info@quamaudio.com
 

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