Equipment information:

Electronic Navigation Industries A-300 Amplifier
Manufacturer:
Electronic Navigation Industries
Model: A-300
Date:
Category: Radio, Communication
Group: Amplifier
Description: BROADBAND POWER AMPLIFIER
Information:
                                    The ENI Model A300 is an all solid state amplifier which has
a flat frequency response from .3 MHz to 35 MHz. It provides
300 watts of linear power with low harmonic and
intermodulation distortion. Gain is 55 dB nominal, with a
variation of less than ± 1.0 dB over the entire frequency
range. Input and output impedance are 50 ohms and the unit
may be driven to full power output by most RF synthesizers,
signal generators and swept signal sources.
The ENI Model A300 will deliver its rated power output into
any load impedance, regardless of match. Built-in protection
circuitry will absorb the power reflected from a mismatched
load without causing failure or oscillation.
Output RF voltage is displayed on the front panel meter. The
Model A300 is packaged for bench mounting and is shipped
with rack mounting adapters. Its integral power
supply and cooling operate from a 115 or 230 V ac 50/60 Hz
main supply.
The Model A300 will raise the power level of signal sources
and generators without requiring tuning or band- switching.
The Class A linear circuitry will amplify signals of AM, FM,
SSB, TV and complex modulations limited only by their peak
input and bandwidth, with minimum distortion.

These manuals are available for the above equipment:

Electronic Navigation Industries -- A-300 -- Service and User Manual
File name: ENI-7571-Manual-Page-1-Picture
Manual Type: Service and User Manual
Pages: 31
Size: 1.60 Mbytes (1673279 Bytes)
Language: english
Revision:
Manual-ID/Number:
Date:
Quality: Scanned document, reading partly badly, partly not readable.
Upload date:
MD5: 8831ab8fd7b5899ced065e1324208e5a
ed2kID: b24c2ce2d1f155cc73b0414a2cd286eb
Downloads: 15 since 25 January 2016
Information:
CHAPTER 1 GENERAL INFORMATION 1-1
1.1 introduction................................. 1-1
1.2 Specifications............................... 1-1
1.3 instrument Identification............. 1-1
CHAPTER 2 PREPARATION 2-1
2.1 Initial Inspection .......................... 2-1
2.1.1 Mechanical Check ........................ 2-1
2.1.2 Claim for Damage ........................ 2-1
2.1.3 Performance Check.................... 2-1
2.2 Preparation for Use..................... 2-1
2.2.1 Power Requirements............... . 2-1
2.2.2 Power Cable Ground Protection . 2-1
2.2.3 Cooling........................................ 2-2
2.3 Rack Mounting............................ 2-2
2.4 Packaging for Reshipment ..... 2-2
CHAPTER 3 OPERATION 3-1
3.1 Functional Description............... 3-1
3.2 Controls, Indicators and
Connectors............................... 3-1
3.3 Operating Procedure..................... 3-1
3.4 Precautions.............................. 3-1
CHAPTER 4 PRINCIPLES OF OPERATION 4-1
4.1 General........................................ 4-1
4.2 Block Diagram Description .... 4-1
4.2.1 Driver Amplifier Module {A48A}
A300-4382 ............................... 4-1
4.2.2 Power Amplifier Module (A40A)
A300-4381 ............................... 4-1
4.2.3 Bias Regulator Module (A49)
A300*4387............................... 4-1
4.2.4 Four-Way Splitter/Combiner
Module (A50) A300-4383 ... 4-3
4.2.5 Two-Way Output Combiner
Module (A51) A300-4384 ... 4-3
4.2.6 RF Voltmeter Module
(A29M) A300-4386 ............... 4-3
4.2.7 Power Distribution
A300-2381 ............................... 4-3
CHAPTER 5 PERFORMANCE
TEST PROCEDURES 5-1
5.1 Performance Tests . ..................... 5-1
5.1.1 General .......................................... 5-1
5.1.2 Test Equipment Required.......... 5-1
5.1.3 Gain and Gain Variation Test.. . 5-1
5.1.3.1 Calibration of Set Up.................. 5-1
Paragraph Page
5.1.3.2 Measurement Procedure............. 5-1
5.1.4 RF Output Power Test............... 5-2
5.1.4.1 Measurement Procedure............. 5-2
5.1.5 RF Output Distortion Test .... 5-2
5.1.5.1 Measurement Procedure ............. 5-2
CHAPTER 6 TROUBLESHOOTING AND REPAIR 6-1
6.1 Troubleshooting............................ 6-1
6.2 Locating Faulty RF Module.... 6-2
6.2.1 General........................................ 6-2
6.2.2 Isolating Amplifier Problem ... . 6-2
6.2.2.1 Two-Way Output Combiner
Test {A51> A300-4383 .......... 6-3
6.2.2.2 Heatsink Assembly Test
A300-3385.............................. 6-3
6.2.2.2.1 Bias Voltage Check...................... 6-3
6.2.2.2.2 RF Power Test............................ 6-3
6.2.2.3 Driver Amplifier Module
(A48A) A300-4382 ............... 6-4
6.2.3 RF Voltmeter
(A29M) A300-4386 .................. 6-4
6.2.3.1 Alignment Procedure................. 6-4
6.3 DC Power Supply ...................... 6-4
6.3.1 General . . .................................. 6-4
6.3.2 Test Procedure............................ 6-5
6.4 Disassembly Procedure............... 6-5
6.4.1 General........................................ 6-5
6.4.2 Tools Required........................... 6-5
6.4.3 Removal of Cover...................... 6-5
6.4.4 Driver Amplifier Heatsink
Assembly A300-3386 ............. 6-5
6.4.5 Power Supply Regulator
Board {A53A) A300-4385 ... 6-5
6.4.6 Power Amplifier Heatsink
Assembly A300-3385 ...... 6-5
6.4.7 Power Amplifier Power Supply
A300-3387 .............................. 6-6
6.4.8 Driver Amplifier Power Supply
A300-3388...................... 6-6
6.4.9 Four-Way Splitter/Combiner
Module (A50) A300-4383 ... 6-6
6.4.10 Power Amplifier Module
(A40A) A300-4381 ............... 6-6
6.4.11 Two-Way Output Combiner
(A51) A300-4383 ................. 6-6
CHAPTER 7 SCHEMATICS AND PARTS LIST 7-1
7.1 Schematic Diagrams .................... 7-1
7.2 Parts List................................ 7-1
7.3 List of Manufacturers.................. 7-1
7.4 Ordering Replacement Parts. ... 7-1
ENI-7571-Manual-Page-1-Picture
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