User Manuals: Harris MW-SB AM Broadcast Transmitter

Manuals and User Guides for Harris MW-SB AM Broadcast Transmitter. We have 1 Harris MW-SB AM Broadcast Transmitter manual available for free PDF download: Technical Manual

Harris MW-SB Technical Manual

Harris MW-SB Technical Manual (238 pages)

AM BROADCAST TRANSMITTER

Brand: Harris | Category: Transmitter | Size: 16 MB

Table of Contents

Table of Contents
9
Introduction
16
Section I
16
- General Description
  16
Incoming Inspection and Unpacking
26
Installation
26
Introduction
26
Introduction
60
- Operation
  60
- Controls and Indicators
  60
- Operating Procedure
  60
- Detailed Description of Circuits
  90
  - RF Subsystem
    90
    
    Oscillator Module 1A2Al
    90
    
    IPA and RF Drivers, 1A2A3
    91
    
    Audio Subsystem
    92
    
    Modulation Enhancer
    92
    
    Power Amplifier Grid Circuit
    92
    
    PDM and Audio Driver, 1A1
    93
    
    PDM Board Lalal
    93
    
    Principles of Pulse Duration Modulation
    93
    
    Pulse Duration Modulator, Simplified Diagram
    94
    
    PDM Waveforms
    95
    
    Audio Driver Board, 1A1A3
    96
    
    Modulator Tube
    96
    
    Modulator Tube Circuit
    96
- 75 Khz Filter
  96
  - Damper Diode Assembly
    96
    
    Bessel Filter
    97
    
    Dissipation Limiter
    97
    
    Negative Feedback
    97
    
    Arc Overloads
    98
    
    Flag and Overload 1A2A2
    98
    
    Positive Feedback
    98
    
    Variable Feedback
    98
    
    VSWR Overload
    98
    
    DC Overload
    99
    
    Dissipation Limiter
    99
    
    Modulator Screen Overload
    99
    
    Overload Counter
    99
    
    AC Control 1A4
    100
    
    Remote PA Plate Voltage Metering Amplifier
    100
    
    Directional Coupler Board 1A8
    101
    
    High-Voltage Transformer Protection
    101
    
    High/Low Power Control
    101
    
    Maintenance
    103
Introduction
103
Maintenance Logbook
103
- Safety Precautions
  104
- Preventive Maintenance
  104
  - Blower Filter Cleaning
    105
  - 5-18.· Blower Cleaning
    105
  - Maintenance of Components
    105
    
    Capacitors
    106
    
    Fixed Resistors
    106
    
    Transistors
    106
    
    Fuses
    107
    
    Transformers
    107
    
    Variable Resistors
    107
    
    Meters
    108
    
    Relays
    108
    
    Switches
    108
    
    Indicators and Indicator Switches
    109
    
    Printed-Circuit Boards
    109
- Corrective Maintenance
  110
- Alignment and Calibration
  110
  - Transmitter Alignment
    110
  - PA Tune Capacitor 1Cl4
    113
  - 3Rd Harmonic Resonator Tuning
    113
  - Setting O~Tput Network
    113
  - PA Tune Capacitor 1Cl4 Values
    114
  - Oscillator, IPA, and RF Driver Alignment
    126
    
    Oscillator Alignment
    126
    
    IPA Tuning
    129
    
    RF Driver Check
    131
  - Carrier Frequency Check
    134
  - Efficiency Tuning
    134
  - Overload Checks and Adjustments
    134
  - Air Pressure Switch Sensitivity
    140
  - Electrical Zero of Plate Voltage Meter
    141
  - Audio Input/Pdm Control Feedback Board
    142
    
    Audio Board Alignment
    143
    
    Audio Board Adjustment
    144
    
    Bessel Filter Adjustment
    145
    
    Low-Frequency -3 Db Point Adjustment
    145
  - Distortion Minimizatton
    145
    
    Troubleshooting
    147
Purpose
103
Station Records
103
Transmitter Logbook
103
General
147
- Technical Assistance
  147
  - Transmitter Totally Inoperative
    147
High Voltage on Function Inoperative
147
- High Voltage Immediately Shuts down When Plate on Pushbutton Switch Depressed
  147
- Modulation Enhancer 1A1A4 Troubleshooting
  157
- RF Oscillator Module 1A2Al Troubleshooting
  159
- PDM Module Lalal Troubleshooting
  161
- RF Driver 1A2A3 Troubleshooting
  162
- Replaceable Parts List Index
  164
- PC Bd Xfmrless and Input
  164
- Oscillator
  164
- RF Driver, 1A2A3
  164
- RF Driver Module
  164
- Flag/Overload PC
  164
- AC Power Panel, 1A4
  164
- Power Supply, 1A.5
  164
- HV Rectifier
  164
- Rt Mrt Panel
  166
- Audio Driver
  174
- RF and Overload
  176
- Left Meter Panel 1A7
  187
- Directional Coupler
  188
- Meter Multiplier
  192
- Mw-5B am Broadcast Transmitter
  195
- Mw-5B am
  195

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