MX-5050 MKIV-2 and BIII-2 Operation and Maintenance Manual — Digital Edition · Part 8 · PDF pages 90-94
Specifications
| 8.1 | Tape Transport | 8-2 |
| 8.2 | Electronics | 8-3 |
8.1 Tape Transport↑ TOP
Track Configuration
| MX-5050 BIII-F | Full Track |
| MX-5050 BIII-2 | 2 Track NAB |
| MX-5050 BIII-2E | 2 Track DIN |
| MX-5050 MKIV-2 | 2 Track NAB |
Tape Width
Tape Width: 1/4"
Heads
| BIII-F | BIII-2 | BIII-2E | MKIV-2 |
|---|---|---|---|
| Repro (2T) x 1 | Erase x 1 | Erase x 1 | Erase x 1 |
| Erase x 1 | Record x 1 | Record x 1 | Record x 1 |
| Record x 1 | Repro x 1 | Repro x 1 | Repro x 1 |
| Repro (FT) x 1 |
Motor
Capstan x 1 (DC brushless PLL servo motor)
Reel x 2 (AC Induction Motor)
Reel Size
max. 10.5" 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 b% |
| 7.5 ips: | max. ± 0.08 % |
| 3.75 Ips: | max. ± 0.12 % |
Start Time
Time required to accelerate to double the specified Wow and Flutter value.
| Speed | Start Time |
|---|---|
| 15 ips | max. 0.5 sec |
| 7.5 ips | max. 0.4 sec |
| 3.75 ips | max. 0.3 sec |
Stop Time
Time to stop from Play mode
| Speed | Stop Time |
|---|---|
| 15 ips | max. 0.5 sec |
| 7.5 ips | max. 0.3 sec |
| 3.75 ips | max. 0.3 sec |
Time to Stop from Fast Wind max. 3 sec.
Fast Wind Time
max. 110 sec for 2500 ft (50Hz)
max. 90 sec for 2500 ft (60 Hz)
8.2 Electronics↑ TOP
Input
Line
Mode: Transformerless Active Balanced
Input Impedance: 100kΩ, 20Hz–20kHz
Nominal Level: +4dBu
Max. Level: +30dBu
Connectors: XLR Female type
Mic
Mode: Transformerless Active Balanced
Input Impedance: 10kΩ
Min. Level: –70dBu/–50dBu/OFF switchable
Mic. Impedance: Min. 150Ω
Output
Line
Mode: Transformerless Active Balanced
Output Impedance: Max 5Ω (20Hz–20kHz)
Load Impedance: MIn. 200Ω
Nominal Level: +4dBu/–16dBu switchable
Max Level: +26dBu for 200Ω
Connectors: XLR Male type
Phone
Load Impedance: 8Ω
1/4" Standard Stereo Phone Jack
Note: 0dBu = 0.775V
Equalization
NAB/IEC Selectable
Standard Reference Flux
| MX-5050 BIII-2, MKIV-2, BIII-F | 185/250/320* nWb/m |
| MX-5050 BIII-2E, MKIV-2E | 250/320/510* nWb/m |
(*open circuit flux)
Frequency Response
| REC/REP | Frequency Response |
|---|---|
| 15 ips | 30Hz - 20kHz ±2dB |
| 7.5 ips | 30Hz - 18kHz ±2dB |
| 3.75 ips | 20Hz - 10kHz ±2dB |
| REC/SEL-REP | Frequency Response |
|---|---|
| 15 ips | 250Hz - 7.5kHz ±3dB |
| 7.5 ips | 250Hz - 5kHz ±3dB |
| 3.75 ips | 250Hz - 2.5kHz ±3dB |
Signal to Noise Ratio
Model
BIII-2, MKIV-2, 2E
BIII-F
Track (2mm)
Track (2.75mm)
Filter
Unwtd Wtd
Unwtd Wtd
Unwtd Wtd
| Speed | EQ | ||||||
|---|---|---|---|---|---|---|---|
| 15ips | IEC | 70 | 73 | 71 | 74 | 74 | 77 |
| NAB | 69 | 72 | 70 | 73 | 73 | 76 | |
| 7.5ips | IEC | 67 | 70 | 68 | 71 | 71 | 74 |
| NAB | 71 | 73 | 72 | 74 | 75 | 75 | |
| 3.75ips | IEC | 64 | 67 | 65 | 68 | 68 | 71 |
| NAB | 64 | 67 | 65 | 68 | 68 | 71 |
Measured with respect to a recording level of 1,040 nWb/mat 15 and 7.5 ips, and 740 nWb/m at 3.75 ips, using AMPEX 456 or equivalent tape.
Unwtd: Using a 30Hz to 18kHz RC filter to eliminate noise outside the audio spectrum.
Wtd: Using a NAB or ANSI "A" weighting filter and a 1kHz reference.
Distortion
Total Harmonic Distortion
max. 0.3% (15 ips 1kHz, 250 nWb/m, AMPEX 456)
Crosstalk
| MX-5050 BIII-2, MKIV-2 | min. 55dB |
| MX-5050 MKIV-2E, BIII-2E | min. 48dB |
Depth of Erasure
| MX-5050 BIII-F | min. 75dB |
| MX-5050 BIII-2, MKIV-2 | min. 75dB |
| MX-5050 BIII-2E, MKIV-2E | min. 70dB |
Test Oscillator
Sine wave 1kHz/10kHz
Bias Frequency
133kHz
Erase Frequency
133kHz
Operating Environment
5 ~ 40˚C (41 ~ 104˚F) 20 ~ 80% RH
Storage Environment
–20 ~ 45˚C (–4 ~ 113˚F) 10 ~ 80% RH
Dimensions
| MX-5050 BIII | 525 x 430 x 275 mm (H x W x D) |
| MX-5050 MKIV-2 | 480 x 430 x 680 mm |
Weight
| MX-5050 BIII | 28kg |
| MX-5050 MKIV-2 | 34kg |
Optional Accessories
| Name | Part No. | Model |
|---|---|---|
| Auto Locator (8-memory) | CB-119 | |
| Auto Locator (99-memory) | CB-120 | |
| Remote Controller (Transport) | CB-127 | |
| Synchronizer | EC-102 | |
| Remote Controller for EC-102 | CB-131 | |
| Resolver | EC-401 | |
| Input Transformer (2Ch unit) | ZA-53T-T | BIII-F, 2, 2E, MKIV-2, 2E |
| Output Transformer (2Ch unit) | ZA-53S-T | BIII-F, 2, 2E, MKIV-2, 2E |
| Pedestal | ZA-52L | |
| Rack Mount Kit | RK-2B | BIII-F, 2, 2E, BQIII |
| Full Track Kit | KH-44KB |
DIMENSIONS↑ TOP
⤢ zoomDIMENSIONS: an orthographic outline drawing of the MX-5050 chassis in BIII and MKIV-2 configurations, front and side/top views, with the front-panel EDIT, PEAK and VU control labels called out. BIII front view: 430 mm wide, 527 mm high. BIII side view: 206 mm body depth, 220 mm base depth. MKIV-2 top view: 430 mm wide. MKIV-2 side view: 680 mm long, 480 mm high overall, 168 mm to the lower deck.