Equipment information:

Electronic Navigation Industries 1140LA Amplifier
Manufacturer:
Electronic Navigation Industries
Model: 1140LA
Date: 1995
Category: Radio, Communication
Group: Amplifier
Description: BROADBAND POWER AMPLIFIER
Information:
                                    The ENI Mode! 1140LA is an all solid-state amplifier that
has a flat frequency response from 9 kHz to 250 MHz with a
gain of 55 dB. Its 50Ω input is compatible with any
laboratory signal generator, function generator or
integrated circuit oscillator. Input and output impedances
are 50Ω and the unit may be driven to full power output by
most RF synthesizers, signal generators and swept signal
sources. Output power from zero to more than 1500 W is
continuously adjustable by varying the amplitude of the
low-level input. Any load impedance (from an open to a short
circuit) may be connected to the output of the 1140LA
without fear of damage or oscillation. The unit provides
maximum power transfer to a 50Ω load impedance; however, any
load impedance between 40 to 60Ω can be driven with no
reduction in power output. Gain is 55 dB nominal with
variation of less than ±1.0 dB over the entire frequency
range. It provides at least 600 W of saturated power from 4
kHz to 400 kHz.
A built-in, true-average power meter measures both the power
leaving the 1140LA (forward power) and the power absorbed by
the load (load power). Extraordinary meter accuracy is
provided by a unique computer circuit in the output. By
adjusting the tuning (or frequency of the load) and
observing the increase in load power, optimum match can be
readily achieved.
Complete with built-in power supply and cooling system, the
1140LA will operate from any 115 VAC line with a 35 A capacity.
The 1140LA will deliver its rated power output into any load
impedance regardless of match (up to 400 W of reflected
power). Output RF voltage is displayed on the front panel
meter. The 1140LA is packaged for bench mounting and is
shipped with rack-mounting adaptors. The 1140LA will raise
the power level of signal sources and generators without
requiring tuning or bandswitching.

These manuals are available for the above equipment:

Electronic Navigation Industries -- 1140LA -- User Manual
File name: ENI-7563-Manual-Page-1-Picture
Manual Type: User Manual
Pages: 30
Size: 857.79 Kbytes (878376 Bytes)
Language: english
Revision: D1
Manual-ID/Number: 1140LA-TM
Date: 1995
Quality: Scanned document, all readable.
Upload date:
MD5: 7c4d623259936d81f70b5100225b8c37
ed2kID: 35ac5b8606b27aacf022e8adda899db8
Downloads: 25 since 25 January 2016
Information:
General Information
Introduction.....................................................................................................................................................................................................................................1
Chapter 1 - Safety
1.1
Labels..............................................................................................................................................................................................................................1-1
1.1.1 Important Operating or Maintenance
Cautions............................................1-1
1.1.2 Shock Hazard
Warnings..............................................................................1-1
1.1.3
Service.........................................................................................................1-2
1.1.4
Nameplate....................................................................................................1-2
Chapter 2 - Installation and Operation
2.1 Initial
Inspection...........................................................................................................................................................................................2-1
2.1.1 Mechanical
Inspection..................................................................................2-1
2.1.2 Claim for
Damage.......................................................................................2-1
2.1.3 Packaging for
Reshipment..........................................................................2-1
2.2 Installation
Requirements..........................................................................................................................................................2-2
2.2.1 Rack
Installation..........................................................................................2-2
2.2.2 Mains Lead
Connection...............................................................................2-2
2.3
Operation..................................................................................................................................................................................................................2-3
2.3.1 Initial Turn-on
Procedure............................................................................2-3
2.3.2 Performance
Check.....................................................................................2-4
2.4 Tuning the
Load...........................................................................................................................................................................................2-5
Chapter 3 - Technical Description
3.1 General
Description................................................................................................................................................................................3-1
Chapter 4 - Maintenance and Calibration
4.1 Periodic
Maintenance..........................................................................................................................................................................4-1
4.2 Assembly
Description.......................................................................................................................................................................4-1
4.2.1 Power Amplifier
RS-8-4781........................................................................4-1
4.2.2 Power Supply/Driver 1140U-4333
.............................................................4-1
4.2.3 Power Supply Regulator
RS-16-4803..........................................................4-2
4.2.4 Meter Control
1140LA-4333........................................................................4-2
4.2.5 Output Combiner
RS-16-4801.....................................................................4-2
4.3 Transistor
Replacement..................................................................................................................................................................4-3
4.3.1 Component
Removal..................................................................................4-3
4.3.1.1 Cover
Removal....................................................................................4-3
4.3.1.2 Removal of Inverted “U”
Assembly.......................................................4-3
4.3.1.3 Power Amplifier Heatsink
Removal......................................................4-3
4.3.1.4 Power Amplifier Module
Removal........................................................4-4
4.3.1.5 Replacement of RF Power
Transistor..................................................4-4
4.4
Troubleshooting............................................................................................4-5
Appendix A - 1140LA Specifications 

Appendix B - Service Appendix is missing!!
ENI-7563-Manual-Page-1-Picture
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