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MT-3 RADIO SYSTEMS
Copyright © 2000 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. registered in the United States Patent and
Trademark Office.
Issue:
4
Issue Date:
March 2000
Printing Date:
March 2000
Part No.:
IM22-VT3A130AMP
DANIELS
ELECTRONICS LTD.
VT-3A130 AMPLIFIER
INSTRUCTION MANUAL
118 - 138 MHz
Covers the following:
Amplifier portion of VT-3A130-SYD410
Previous Issue:
Previous Issue Date: March 98
TM
3
Daniels Electronics Ltd.
Victoria, BC.
PRINTED IN CANADA
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Table of Contents
Related Manuals for Daniels Electronics Ltd. VT-3A130
Summary of Contents for Daniels Electronics Ltd. VT-3A130
- Page 1 118 - 138 MHz Covers the following: Amplifier portion of VT-3A130-SYD410 Copyright © 2000 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.
- Page 2 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 ELECTRONICS VT-3A130 Amplifier Instruction Manual...
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Page 3: Table Of Contents
4.2.1 VT-3A130 Lowpass Filter Component Layout....... 4-5 4.2.2 VT-3A130 Lowpass Filter Schematic Diagram....... 4-5 PARTS LISTS ................5-1 5.1 VT-3A130 Amplifier Electrical Parts List ........5-1 5.2 VT-3A130 Lowpass Filter Electrical Parts List........5-4 5.3 VT-3A130 Amplifier Mechanical Parts List........5-4 REVISION HISTORY .............. - Page 4 This Page Intentionally Left Blank DANIELS ELECTRONICS VT-3A130 Amplifier Instruction Manual...
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Page 5: General
GENERAL 1.1 Introduction The VT-3A130 Amplifier provides the final stage of RF amplification and filtering for the VT-3A Transmitters. The output power is 1.0 - 4.0 Watt adjustable (carrier only). The amplifier operates over 118MHz - 138 MHz frequency range without tuning. - Page 6 Key-On/Key-off Spectral Mask Transients are at least 80 dBc for frequencies ± 400 kHz from carrier. Operating Temperature Range: -30˚C to +60˚C, optional - 40˚C temperature test. Operating Humidity: 95% Relative Humidity (Non-condensing) at +25°C DANIELS ELECTRONICS VT-3A130 Amplifier Instruction Manual...
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Page 7: Theory Of Operation
Refer to Section 4.1.2 "VT-3A130 Amplifier Schematic Diagram". The RF input signal with a level of -5 dBm to +5 dBm is fed to the VT-3A130 Amplifier Board and then is modulated by a balanced AM Modulator which consists of Q1, Q3, Q4, and a wide band RF transformer XFMR1. -
Page 8: Vt-3/150 Lowpass Filter
2.4 Power Supply Circuitry. The VT-3A130 Amplifier has shutdown circuitry based on Q2 that allows decrease power consumption, less than 0.1 mA from 9.5Vdc, in standby mode. The voltage level on the amplifier enable line of less than +2.0 Vdc turns on the transistor Q2. Q2 supplies the base circuitry of Q1, Q3, Q4, and operational amplifiers U2, U4, and U6. -
Page 9: Vt-3A130 Amplifier Alignment
Please refer the corresponding manuals for each module. 3.2 Repair Note The VT-3A130 Amplifier is mainly made up of surface mount devices which should not be removed or replaced using an ordinary soldering iron. Removal and replacement of surface mount components should be performed only with specifically designed surface mount rework and repair stations complete with ElectroStatic Dissipative (ESD) protection. -
Page 10: Recommended Test Equipment List
3.5 VT-3A130 Amplifier Alignment 3.5.1 General The VT-3A130 Amplifier is a module that is factory assembled to operate in the frequency band: 118MHz to 138MHz. The amplifier requires -5 dBm to 5 dBm of input power and is continuously adjustable over its power range of 1.0 to 4.0 Watts. -
Page 11: Changing Power Output
Adjust the POWER ADJUST pot R19 to achieve the desired RF carrier power output between 1.0 Watt and 4.0 Watt. Apply a 1000 Hz signal with 0.200Vrms level to the power amplifier's MODULATION INPUT and adjust AUDIO ADJUST pot R35 to obtain 90% of modulation. DANIELS ELECTRONICS VT-3A130 Amplifier Instruction Manual... - Page 12 This Page Intentionally Left Blank DANIELS ELECTRONICS VT-3A130 Amplifier Instruction Manual...
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Page 13: Illustrations And Schematic Diagrams
ILLUSTRATIONS AND SCHEMATIC DIAGRAMS 4.1 VT-3A130 Amplifier This Page Intentionally Left Blank DANIELS ELECTRONICS VT-3A130 Amplifier Instruction Manual... -
Page 14: Vt-3A130 Amplifier Component Layout
4.1.1 VT-3A130 Amplifier Component Layout 100nF 332R 220µH 220µH 3k74 M68721 100nF XFMR1 TTWB 100nF SR502 220µH 47R5 100nF 100nF LM1084 22R1 1k82 100nF 332R 100nF 100nF 100nF 22R1 NE02139 22R1 1.5µH MMBD701 220µH 3k01 NE02139 1k82 3k01 150pF 100R... -
Page 15: Vt-3A130 Amplifier Schematic Diagram
4.1.2 VT-3A130 Amplifier Schematic Diagram TO ALL 9.5V SUPPLY POINTS FIL1 LOW PASS FILTER RFC1 VP0610T 5500PF M68721 9.5Vdc 0.5" COAX 118-138 MHz 47uF 47uF 47uF 10nF 1K00 XFMR1 MMBD701 RFC2 TTWB-4-B 5500PF 100R0 AMPLIFIER ENABLE 100nF 3K01 22R1 332R0... - Page 16 This Page Intentionally Left Blank DANIELS ELECTRONICS VT-3A130 Amplifier Instruction Manual...
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Page 17: Vt-3A130 Lowpass Filter
4.2 VT-3A130 Lowpass Filter 4.2.1 VT-3A130 Lowpass Filter Component Layout 30pF 7.5pF 24pF 15pF 4.7pF 30pF PCB 50086-01 VT3A130AMPM3A 4.2.2 VT-3A130 Lowpass Filter Schematic Diagram 3.0 TURNS 3.0 TURNS RF INPUT RF OUTPUT 4.0 TURNS 4.7pF 7.5pF 30pF 30pF 15pF... - Page 18 This Page Intentionally Left Blank DANIELS ELECTRONICS VT-3A130 Amplifier Instruction Manual...
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Page 19: Parts Lists
PARTS LISTS 5.1 VT-3A130 Amplifier Electrical Parts List Design Description Part No. CAP., 220uF ELECTRO.,AXIAL,25V 1064-1GE221TL C2, C3 CAP., SM, 100nF CER., 0805, X7R, 50V 1008-5A104K5R CAP., SM, 10nF CER,0805,X7R,50V 1008-4A103K5R CAP., SM, 100nF CER., 0805, X7R, 50V 1008-5A104K5R CAP., SM, 150pF CER., 0805,C0G... - Page 20 RES., SM, 22K6 0805, 1%,100ppm 1150-4A2262FP RES., SM, 221K0 0805, 1%,100ppm 1150-5A2213FP RES., SM, 3K74 0805, 1%,100ppm 1150-3A3741FP RES., SM, 332R0 0805, 1%,100ppm 1150-2A3320FP RES., SM, 3K92 0805, 1%,100ppm 1150-3A3921FP COUPLER, DIRECT., 5 TURN,1.00" 1227-C5T10484 DANIELS ELECTRONICS VT-3A130 Amplifier Instruction Manual...
- Page 21 Part No. AMP, RF,M68721,10W,118-137 MHz 2256-M6872100 IC, LM386 LV AUDIO AMP.,SO-8 2323-386M1N08 IC, LM2588,REG./ADJ,FLBK,T0263 2305-25880263 IC, MC33172 DUAL OP AMP, SO-8 2302-33172N08 IC, LM1084IT,REG./ADJ,5A,T0220 2205-10842203 IC, MC33172 DUAL OP AMP, SO-8 2302-33172N08 XFMR1 TRANSFMR,RF/WB,.075-90MHz,1:16 1288-50B160D0 DANIELS ELECTRONICS VT-3A130 Amplifier Instruction Manual...
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Page 22: Vt-3A130 Lowpass Filter Electrical Parts List
5.2 VT-3A130 Lowpass Filter Electrical Parts List Desig Description Part No. CAP., SM, 15pF PORCEL.,+-5%500V 1036-1B2150J5 CAP., SM, 7.5pF PORCEL.,+-.25pF 1036-0B2759C5 C3, C4 CAP., SM, 30pF PORCEL., 5%,500V 1036-1B2300J5 CAP., SM, 4.7pF PORCEL.,+-.25pF 1036-0B2479C5 CAP., SM, 24pF PORCEL., 5%,500V 1036-1B2240J5... -
Page 23: Revision History
• Corrected the instruction manual part number on the title page. Part number was IM20-VT3A130AMP now IM22-VT3A130AMP • The Amplifier is now capable of working over the whole AM Frequency band (118 – 138 MHz) without being re-tuned. DANIELS ELECTRONICS VT-3A130 Amplifier Instruction Manual... - Page 24 This Page Intentionally Left Blank DANIELS ELECTRONICS VT-3A130 VHF Amplifier Instruction Manual...
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