DANIELS TM ELECTRONICS LTD. MT-3 RADIO SYSTEMS 25W AM POWER AMP INSTRUCTION MANUAL AMP-3 118 - 138 MHz Covers Model: AMP-3A130-25-00 Copyright © 2002 Daniels Electronics Ltd. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior written consent of Daniels Electronics Ltd. DE™ is a registered trademark of Daniels Electronics Ltd.
NOTE: The user's authority to operate this equipment could be revoked through any changes or modifications not expressly approved by Daniels Electronics Ltd. The design of this equipment is subject to change due to continuous development. This equipment may incorporate minor changes in detail from the information contained in this manual. DANIELS TM ELECTRONICS LTD.
RF Exposure Warning This transmitting equipment conforms to SAR (Specific Absorption Rate) limits regarding exposure of human beings to radio frequency electromagnetic energy, as defined in the following national and international standards and guidelines: 1. Industry Canada Radio Standards Specification 102 (RSS-102), Evaluation Procedure for Mobile and Portable Radio Transmitters with respect to Health Canada’s Safety Code 6 for Exposure of Humans to Radio Frequency Fields; 2.
TABLE OF CONTENTS 1 Page GENERAL................................................................................................................1-1 1.1 Introduction....................................................................................................1-1 1.2 Performance Specifications.............................................................................1-1 1.3 Physical Specifications...................................................................................
This Page Intentionally Left Blank DANIELS TM ELECTRONICS LTD.
1 GENERAL 1.1 Introduction The AMP-3A130-25 provides the final stage of RF amplification and filtering for the AM amplifier AMP-3A130-25, 118 - 138 MHz family. The amplifier covers 118 - 138 MHz with continuously adjustable 10.0 to 25.0 W of output power. The amplifier is packaged in the compact Eurostandard (5"h x 2.8"w x 7.5"d) housing, and is robustly designed for mountain top or transportable applications.
1.3 Physical Specifications RF Connectors: Type N Standard Corrosion Prevention: Anodized aluminum construction. Stainless steel hardware. Physical Dimensions: Width: Height: 14.2 cm (5.6") 13.1 cm (5.16") Weight: 2.4 kg (5.5 lb) Features: • Heavy Duty Aluminum Heatsink Depth: 19 cm (7.5") • Thermal switched Fan (at +40˚C) • Outputs of operating status signals: -RF Power - High VSWR DANIELS TM ELECTRONICS LTD.
2 THEORY OF OPERATION DANIELS TM ELECTRONICS LTD.
2.3 RF Amplifier Circuitry DANIELS TM ELECTRONICS LTD.
2.4 Printed Circuit board Numbering Convention To ease troubleshooting and maintenance procedures, Daniels Electronics Limited has adopted a printed circuit board (PCB) numbering convention in which the last two digits of the circuit board number represent the circuit board version. For example: • PCB number 43-912010 indicates circuit board version 1.
This Page Intentionally Left Blank DANIELS TM ELECTRONICS LTD.
3 INSTALLATION AND SITE OPERATION The AMP-3 RF power amplifier is approved for operation with the VT-3A130 exciter. A complete M3 subrack shipped directly from the factory is normally set to the appropriate options and output power calibration as requested by the customer. These units require no tuning. For AMP-3 amplifiers shipped separately from the MT-3 racks, install as outlined: 1. Connect the output of the exciter to the input of the AMP-3 Amplifier with the cable provided. 2.
This Page Intentionally Left Blank DANIELS TM ELECTRONICS LTD.
4 AMPLIFIER ALIGNMENT 4.1 Recommended Test Equipment List To align the transmitter the following test equipment is recommended: M-2/M3 rack/system monitor Power supply: regulated 28.0 volt DC @ 5 A Wattmeter: (e.g. Bird 4421) Spectrum Analyzer (e.g. IFR 7550) Alignment Tool, Johanson type 8777 Daniels Extender Card, EC-48R or EC-48UK SWR Meter, 50 W 200 MHz Power pad 50 ohm splitter (e.g.
Figure 1 RF Power Amplifier Board Alignment Locations DANIELS TM ELECTRONICS LTD.
4.2 RF Amplifier Board Alignment Refer to Figure 1 for location of adjustment capacitors. This procedure assumes the use of 2 separate subracks with the exciter transmitter in system A and the 25W power amplifier in system B. 1. Remove the top extrusion cover housing from the exciter, set the exciter frequency at 128MHz (channel number 1200) and install the exciter in the system A of the M-2 or M-3 subrack. Remove all receivers from the subrack assembly (this will facilitate calibration access). 2.
Figure 2 Control Board Alignment Locations DANIELS TM ELECTRONICS LTD.
4.3 Control Board Alignment 1. After completion of the amplifier alignment, using the RF Level potentiometer in the exciter, set the RF output of the power amplifier to 10 watts. LED1 (labeled RF Power) should be on, otherwise adjust pot R1 until LED1 is just visible. This threshold may be adjusted to any RF power output level for the AMP-3 (10 – 25W). 2. Disconnect the power amplifier RF output and terminate it with the 3:1 mismatch load.
This Page Intentionally Left Blank DANIELS TM ELECTRONICS LTD.
5 ILLUSTRATIONS AND SCHEMATIC DIAGRAMS 5.1 Rack Mounting Positions 25 WATT POWER AMPLIFIER 8843M1 DANIELS TM ELECTRONICS LTD.
5.2 RF Power Amplifier Block Diagram COOLING FAN FRONT PANEL REAR CONNECTOR CONTROL BOARD LED ARRAY REMOTE POWER O/P FAIL RF POWER HIGH VSWR Driver REMOTE VSWR OVERLOAD OVER TEMP PTT LOGIC CONTROLLER PWR SWITCH +28VDC ON OFF PWR Supply RF INPUT SAMPLE I/P ATT. RF IN THERMOSTAT POWER DETECTOR INPUT MATCHING NETWORK LOW PASS PILTER RF OUT OUTPUT MATCHING NETWORK DIR. COUPLER POWER AMPLIFIER BOARD AMP3A130M2 DANIELS TM ELECTRONICS LTD.
5.3 POWER AMPLIFIER EXPLODED VIEW HEAT SINK D POWER AMPLIFIER 14HP CASE F E F D E G BACK BLOCK F G Sli de PC B int os lot POWER AMPLIFIER SHIELD E F E E F E F 4 E RF AMPLIFIER BOARD C F F C C F E C E F E D C C E D C C H I H FRONT BLOCK I COOLING FAN CONNECTOR E E Instructions 1. Remove the 4 Front Panel screws (A). A CONTROL BOARD 2. Remove the Power Amplifier Case. 3. Unplug the Cooling fan connector. A 4.
5.
A B C D E F G H I J K L M N O P 1 1 5.
5.6 Control Board - Component Layout DANIELS TM VICTORIA B.C . ELECTRONICS LTD.
A B C D E F G H I J K L M N O P 1 1 5.
This Page Intentionally Left Blank 5-8 25W AM Power Amplifier Instruction Manual IM71-AMP3A130-25
6 PARTS LISTS 6.1 RF Power Amplifier Board Electrical Parts List Ref Desig Description DANIELS Part No. TM ELECTRONICS LTD.
Ref Desig Description DANIELS Part No. TM ELECTRONICS LTD.
Ref Desig Description Part No. 6.2 RF Power Amplifier Board Mechanical Parts List Description Part No. Qty. BACK BLOCK, DWG NO. 10596-02 CAP SCREW, M3x8 HEX SOCK-M2.5 FRONT BLOCK, DWG NO. 10595-02 HEAT SINK, DWG NO. 10594-03 LID, LPF SHIELD, DWG NO. 10601-01 LOCKWASHER, M3, SPLIT, A2 STEEL PVB, SCREW, M3 x 8, PAN/PHIL, A2 SCREW, M3 x 10, FLAT/PHIL, A2 SCREW, M3 x 6, FLAT/PHIL, A2 WALL, LPF SHIELD, DWG NO. 10600-01 TAB, GROUND, M3,14.
6.3 Control Board Electrical Parts List Ref Desig Description DANIELS Part No. TM ELECTRONICS LTD.
Ref Desig Description DANIELS Part No. TM ELECTRONICS LTD.
Ref Desig Description DANIELS Part No. TM ELECTRONICS LTD.
6.4 Control Board Mechanical Parts List Description Part No. Qty. FUSE CLIP, RIVET MOUNT PA FRONT PANEL, DWG 10582-03 HANDLE/NAMEPLATE KIT, 28HP, GREY FAN, 12VDC, 60X60X25mm, 20CFM TBA TBA TBA TBA M33455-16, NIDEC TBA 50-57-9402, MOLEX 5021-TF22B002 2 1 1 1 CONN., .100”, CRIMP HOUSING, 2CCT TERMINAL, CRIMP, FEM., 22-24,Au GUARD, FOR 60mm SQ. FAN, STEEL TUBING, TFE-260C, 8AWG T/W, CLR FUSE, 8 AMP FAST-BLO CASE, 14HP RF PLUG-IN, MT-3 PA GASKET, BeCu, 3FINGER, 71",CLIP SCREW, M4 X 35, PAN/PHIL.
This Page Intentionally Left Blank DANIELS TM ELECTRONICS LTD.
7 Issuei 1 i REVISION HISTORY Issued Revised July 2002 Details First Issue When a revision letter is assigned, it indicates that a revised issue has been released for in-house distribution only. DANIELS TM ELECTRONICS LTD.
This Page Intentionally Left Blank DANIELS TM ELECTRONICS LTD.
