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General| Tracks | 2 |
|---|---|
| Signal-to-Noise Ratio | 60 dB |
| Input | Microphone, Line |
| Weight | 7.5 kg |
| Type | Portable Audio Recorder |
| Reel Size | 5-inch |
| Heads | 3 (erase, record, playback) |
| Output | Line, headphones |
| Power Supply | Battery or AC |
| Track System | Full track |
| Tape Speed | 3.75, 7.5, 15 ips |
Guidelines for handling, inserting, and storing batteries.
Advice on protecting the device from damage and environmental factors.
Describes the switch for selecting tape speed and equalization.
Explains the function of the tension pulley in tape handling.
Details microphone input, level meter, and battery indicator functions.
Describes the function selector switch and accelerator button.
Details volume controls and monitoring output sockets.
Lists line input, accessory, and balanced output ports.
Explains tape transport controls, pinch wheel, capstan, and heads.
Describes the feed and take-up spools and compatible battery types.
Explains the servo-circuit for motor speed control.
Addresses issues related to motor starting and initial run-up.
Details issues with speed control response and operation.
Details common audio distortions like wow and flutter and their causes.
Procedures for motor disassembly and magnet maintenance.
Diagnosing and fixing faults in the rotor and commutator.
Addresses mechanical friction and commutator axis alignment.
Guidelines to prevent and identify internal noise sources.
Covers static discharge and parasitic noises from the motor.
Explains a push-button for selecting sound sources for monitoring.
Details a new microphone preamplifier with selectable impedance.
Presents frequency response data for 38 and 19 cm/s speeds.
Presents playback frequency response data for 7.5'/s speed.
Summary of the final quality control inspection.
Lists the tests conducted on the device, e.g., current consumption, speed control.
Provides technical context and explanations for test procedures.
Details procedures for wow/flutter and battery voltage limit tests.
Explains tests for reproduce signal level and tape erasure efficiency.
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