ITT - Mackay Type 3020A - Receiver
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Equipment:
Mackay Type 3020A
Date:
1972
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Information
The ITT Mackay Marine Model 3020A Radio Receiver is a
solid-state dual-conversion superheterodyne Receiver providing continuous frequency coverage from 15 KHz to 29.
9999 MHz.
This section generally describes the 3020A Receiver and
lists the major components and corresponding part numbers.
Included are electrical considerations and characteristics
applicable to the 3020A.
1 Manual
Service and user manual
Manual type:
Service and user manual
Pages:
80
Size:
5.7 MB
Language:
english
Revision:
Manual-ID:
690001-000
Date:
Quality:
Scanned document, all readable.
Upload date:
Jan. 26, 2014
MD5:
c3449712-fa6b-5588-9695-af0074ededa4
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1516
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Information
GENERAL DESCRIPTION
4. 2
Page
1. 1 Introduction 1. 1
1. 2 Description 1. 1
a. Mechanical 1. 1
b. Major Components 1. 2
c. Electrical 1. 3 1, 3 Electrical Characteristics 1. 3
1. 4 Comparison of ITT Synthesized Receiver 1. 5
INSTALLATION
2. 1 Cabinet/Rack 2. 1 2. 2 Power Connections 2. 1 2. 3
Other Rear Panel Connections 2. 1
2. 4 Fuses
OPERATING INSTRUCTIONS
3. 1 Controls 3. 1 3. 2 SSB Operation 3. 2 3. 3 CW
Operation 3. 3 3. 4 AM Operation 3. 3
3. 5 Duplex Operation 3. 4
TECHNICAL DESCRIPTION
4. 1
Signal Path 4. 1
a. Block Diagram Analysis 4. 1
b. Preselector 4. 2
c. RF Section 4. 2
d. 2nd Mixer 4. 5
e. 8 MHz IF Amplifier 4. 5
f. Information Filters 4. 5
g. AM and Product Detectors 4. 6
h. Audio Amplifier 4. 6
i. AGC Amplifier 4. 6
j • Variable BFO 4. 7
k. Regulator 4. 7
Synthesizer
a. Block Diagram Analysis 4. 8
b. Low Frequency Reference 4. 12
c. VHF Reference Card 4. 12
d. Minor Loop Analog 4. 13
e. Minor Loop Variable Divider 4. 13
4. 2 Synthesizer (Cont)
f. Loop Translator 4. 14
g. Minor Loop Variable Decoder 4. 14
h. Decoder 4, 16
i. Major Loop Analog
and Acquisition 4. 16
j • Major Loop VCO Buffer 4. 17
GENERAL SERVICE INFORMATION
5. 1 Introduction 5. 1
5. 2 Synthesizer 5. 2
CARD TEST AND SETUP INSTRUCTIONS
Introduction 6. 1
a. RF Section Alignment 6. 1
b. 2nd Mixer Alignment 6. 2
c. 8 MHz IF Amplifier Alignment 6. 3
d. AM and Product Detector
Alignment 6. 4
e. AGC Amplifier Alignment 6, 4
f. Regulator Alignment 6. 5
Synthesizer Adjustments 6. 5
a. Minor Loop Analog Alignment 6. 5
b. Loop Translator Alignment 6. 6
c. VHF Reference Alignment 6. 8
d. Major Loop Analog and
Acquisition Alignment 6. 8
SCHEMATIC, WIRING, ASSEMBLY DRAWINGS, AND SPARE PARTS LIST 7. 1
Signal Path Block Diagram 4. 3
Synthesizer Block Diagram 4. 9
3020A Truth Tables 5. 3 Test Set-up: 88. 45-MHz Filter
Adjustment 6. 7
Response of 88. 45-MHz Filter 6. 7