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General| Reel Size | Up to 7 inch reel |
|---|---|
| Signal-to-Noise Ratio | 50dB |
| Type | Reel-to-Reel |
| Track System | 4-track, 2-channel stereo |
| Tape Speed | 3 3/4 ips, 7 1/2 ips |
| Heads | 1 x playback, 1 x record, 1 x erase |
| Input | Microphone, Line |
| Output | Line |
Detailed technical characteristics and performance parameters of the tape recorder.
Procedures and setups for testing tape speed, wow, flutter, frequency response, and noise.
Step-by-step instructions and visual guides for disassembling the tape recorder.
Procedures for adjusting pinch wheel, reel shafts, and tape transport mechanisms.
Steps for aligning and adjusting erase, recording, and playback heads for optimal performance.
Calibration steps for playback and recording levels, bias, and erase voltage.
Specifications for the DC resistance of heads and motor components.
Visual diagrams showing component layouts on various circuit boards.
Exploded view and part numbers for the head assembly components.
List of parts for the tape reel supply and take-up mechanisms.
Components related to the flywheel and belt change lever mechanism.
Parts list for the various switches and their related mechanisms.
Includes Tape Guide Block and Assembly Block components for the mechanism.
Component breakdown for the pre-amplifier circuit board.
Parts for the oscillator and power supply circuit boards.
Components for the main amplifier assembly.
List of parts for the overall amplifier assembly.
Detailed circuit diagram for the Model 4400D tape deck.
Detailed circuit diagram for the Model 4400 tape recorder.
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