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MT-3/MT-4 RADIO SYSTEMS
Copyright © 1998 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 Electronic Ltd. registered in the United States Patent and
Trademark Office.
Issue: Peliminary
Issue Date:
October 98
Printing Date: October 98
Part No.:
IM23D-UT34400AMP
UHF AMPLIFIER
INSTRUCTION MANUAL
UT-3 / UT-4
406 - 470 MHz
Covers models: UT-3/400 Amplifier
Previous Issue:
Previous Issue Date: N/A
UT-4/400 Amplifier
N/A
Daniels Electronics Ltd.
Victoria, B.C.
PRINTED IN CANADA
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Table of Contents
Related Manuals for Daniels MT-3
Summary of Contents for Daniels MT-3
- Page 1 Covers models: UT-3/400 Amplifier UT-4/400 Amplifier Copyright © 1998 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 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.
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Page 3: Table Of Contents
ILLUSTRATIONS AND SCHEMATIC DIAGRAMS ........4-1 UT-3/400 UHF Amplifier Component Layout........4-2 UT-3/400 UHF Amplifier Schematic Diagram ........4-3 UT-3/400 UHF Lowpass Filter Component Layout....... 4-5 UT-3/400 UHF Lowpass Filter Schematic Diagram....... 4-5 DANIELS ELECTRONICS UHF Amplifier Instruction Manual UT-3/UT-4 406 - 512 MHz... - Page 4 PARTS LISTS...................5-1 UT-4/400 UHF Amplifier Electrical Parts List........5-1 UT-4/400 UHF Amplifier Mechanical Parts List ........5-4 UT-3/400 UHF Low Pass Filter Electrical Parts List ......5-4 REVISION HISTORY................6-1 DANIELS ELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz...
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Page 5: General
Refer to Section 4 for the UT-3 406 - 512 MHz UHF amplifier and lowpass filter component layouts and schematic diagrams Performance Specification Type: MT-3 series UHF Amplifier module. Compatibility: MT-3 series Transmitter Main Board. Frequency Range: 406 to 430 MHz, 450 to 470 MHz, 470 to 490 MHz or 490 to 512 MHz. - Page 6 0.5 mA. Amplifier Enable: Active to ground. Amplifier Enable Response: typically overdamped, rising to within 90% of full power within 5 msec; maximum (underdamped) overshoot of 30%. DANIELS ELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz...
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Page 7: Theory Of Operation
RF circuitry. Power for the UT-3/400 Amplifier is provided from the MT-3 Transmitter Board. The +13.8 Vdc supply (if required) is continuously connected to the amplifier; whereas, the +9.5 Vdc supply is always switched by the transmitter's PTT circuitry. -
Page 8: Power Requirements
512 MHz. The lowpass filter assembly attenuates the desired signal's harmonics as well as any other out-of-band emissions so that a 'clean' RF signal is output to the antenna connector. DANIELS ELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz... -
Page 9: Power Control Circuitry
In open collector configuration, Q6 (the open collector output transistor) is turned on when an alarm condition occurs. The adjustment range for the output power alarm can vary depending on the setting of R21 (the Output Power Alarm Adjust potentiometer). DANIELS ELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz... -
Page 10: Vswr Sense
Adjust potentiometer (R36). The VSWR overload transistor Q4 can be activated at the same point at which the VSWR alarm becomes active or the VSWR overload circuit can be disabled by turning R38 completely counterclockwise. DANIELS ELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz... -
Page 11: Ut-3/400 Amplifier Alignment
Radio communications test set : Marconi Instruments 2955R VSWR 3:1 mismatch load: JFW 50T-035-3.0:1 three 50 Ω cables of incremental length 20 to 40 cm coaxial test cable set Alignment Tool: Johanson 4192 DANIELS ELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz... -
Page 12: Printed Circuitboard Numbering Convention
• PCB number 43-9120 10 indicates circuitboard version 1.0; • PCB number 50002- 02 indicates circuitboard version 2.0. All PCB's manufactured by Daniels Electronics are identified by one of the above conventions. Standard Factory Settings and Jumper Configuration The UT-3/400 Amplifier is factory configured as follows: •... -
Page 13: Ut-3/400 Amplifier Adjustment
However, if the output power alarm or the Antenna VSWR alarm output configuration requires changing, the UT-3/400 Amplifier must be detached from the MT-3 Transmitter Board. Refer to section 4 page 2 "UT-3/400 Amplifier Component Layout" for the location of solder jumpers JU1 to JU5. -
Page 14: Output Power Alarm (Forward Power)
Open the amplifier case to disable (open circuit) jumper JU2 and enable (short) jumper JU1. Monitor transmitter pin B26 with a voltmeter. Adjust R7, the output power adjustment, for full transmitter output power. DANIELS ELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz... -
Page 15: Output Power
Open the amplifier case to disable (open circuit) jumper JU3 and enable (short) jumper JU4. Monitor transmitter pin Z26 with a voltmeter. Disconnect the radio communications test set and terminate the transmitter with the 3:1 mismatch load. DANIELS ELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz... -
Page 16: Antenna Vswr Overload
Verify that the current drawn from the +13.8 Vdc supply is less than 1.5 A and from the +9.5 Vdc supply is less than 1.2 A when transmitting full 8 W RF output power. Turn off the power to the transmitter. DANIELS ELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz... -
Page 17: Illustrations And Schematic Diagrams
ILLUSTRATIONS AND SCHEMATIC DIAGRAMS This Page Intentionally Left Blank DANIELS ELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz... - Page 18 Components installed on bottom of board 1k00 Components mounted on case PZT2222A M3 x 8 Screws M2.5 x 6 Screws UT-3/400 LOWPASS FILTER ASSEMBLY 1k00 M3 x 8 - M2.5 Cap Sock DANIELS DANIELS UT3AMPM1A VICTORIA B.C . VICTORIA B.C . ELECTRONICS ELECTRONICS TITLE: TITLE:...
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Page 19: Ut-3/400 Uhf Amplifier Schematic Diagram
4.7 pF 3.0 pF Not Installed C26* 4.7 pF 3.0 pF 3.0 pF 3.0 pF DANIELS ELECTRONICS UNUSED REFERENCE DESIGNATORS VICTORIA B.C. NOTE: * denotes components only installed on high power (2.0 - 8.0 Watt) units. TITLE: UT-3/UT-4 AMPLIFIER SCHEMATIC DIAGRAM... - Page 20 This Page Intentionally Left Blank DANIELS ELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz...
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Page 21: Ut-3/400 Uhf Lowpass Filter Component Layout
UT-3/400 UHF Lowpass Filter Component Layout UT-3/400 UHF Lowpass Filter Schematic Diagram DANIELS ELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz... - Page 22 This Page Intentionally Left Blank DANIELS ELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz...
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Page 23: Parts Lists
DIODE, MBZ5233B 6.0V ZENER, SOT-23 2102-MBZ5233B DIODE, IN5402 3A RECT, DO-201AD 2001-1N540200 D3, D4 DIODE, BYD17J RECTIFIER, SOD-87 2101-BYD17J00 DIODE, MMBD701 HOT CARRIER, SOT-23 2105-MMBD7010 D6, D7 DIODE, MMBD701 HOT CARRIER, SOT-23 2105-MMBD7010 DANIELS ELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz... - Page 24 1150-3B1001FP RES., SM, 49k9 1206, 1%, 100ppm 1150-4B4992FP RES., SM, 100k 1206, 1%, 100ppm 1150-5B1003FP RES., SM, 27k4 1206, 1%, 100ppm 1150-4B2742FP RES., SM, 10k0 1206, 1%, 100ppm 1150-4B1002FP DANIELS ELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz...
- Page 25 2257-MHW70702 (450-470 MHz) AMP, RF, MHW707-3 7W, 470-500 MHz 2257-MHW70703 (470-490 MHz) AMP, RF, MHW707-4 7W, 490-512 MHz 2257-MHW70704 (490-512 MHz) UT-3/400 AMPLIFIER 4323-15931613 UT-3/400 LOWPASS FILTER ASSEMBLY A23-LPF-3 DANIELS ELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz...
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Page 26: Ut-3/400 Uhf Low Pass Filter Electrical Parts List
UT-3/400 UHF Amplifier Mechanical Parts List Description Part No. Qty. CAP SCREW, 8-32 X 1/4, HEX BUTTON - 9/64 5806-832BH04S (0.5 - 2.0 Watts) CASE, MT-3 VHF/UHF AMPLIFIER, ALUMINUM 3702-66102130 HEATSHRINK, 1/8" DIA, RED, 1" LENGTH CONSUMABLE (2.0 - 8.0 Watts) INSULATOR, THERM. COND. TO-220... -
Page 27: Revision History
REVISION HISTORY ISSUE DATE REVISION October 98 First Issue. DANIELS ELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz... - Page 28 ISSUE DATE REVISION DANIELS ELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz...