Codan Radio Communications VT-4-150 VT-4x150 VHF Transmitter User Manual IM21 VT3150AMP 1 VHF Amplif
Codan Radio Communications VT-4x150 VHF Transmitter IM21 VT3150AMP 1 VHF Amplif
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| Document Title | IM21-VT3150AMP-1 VHF Amplif.PDF |
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DANIELS ELECTRONICS LTD. ® MT-3 RADIO SYSTEMS VHF AMPLIFIER INSTRUCTION MANUAL VT-3 132 - 174 MHz Covers models: VT-3/150 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. Issue: Issue Date: Printing Date: Part No.: Previous Issue: N/A May 98 Previous Issue Date: N/A May 98 IM21-VT3150AMP Daniels Electronics Ltd. Victoria, B.C. PRINTED IN CANADA Reviewed By: Quality Assurance: Name Signature _________________ Date 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 DEELECTRONICS ii VHF Amplifier Instruction Manual VT-3 132 - 174 MHz TABLE OF CONTENTS Page GENERAL....................................................................................... 1-1 1.1 Introduction............................................................................. 1-1 1.2 Performance Specification ............................................................ 1-1 THEORY OF OPERATION................................................................... 2-1 2.1 Amplifier Operation.................................................................... 2-1 2.2 Power Requirements................................................................... 2-1 2.3 RF Circuitry ............................................................................ 2-2 2.3.1 VT-3/150 Lowpass Filter .................................................... 2-2 2.4 Power Control Circuitry............................................................... 2-2 2.5 Power Sensing Circuitry .............................................................. 2-3 2.5.1 Output Power Sense .......................................................... 2-3 2.5.2 VSWR Sense .................................................................. 2-3 2.5.3 VSWR Overload .............................................................. 2-4 VT-3/150 AMPLIFIER ALIGNMENT ...................................................... 3-1 3.1 General.................................................................................. 3-1 3.2 Repair Note ............................................................................. 3-1 3.3 Recommended Test Equipment List ................................................. 3-1 3.4 Printed Circuitboard Numbering Convention....................................... 3-2 3.5 Standard Factory Settings and Jumper Configuration ............................. 3-2 3.6 VT-3/150 Amplifier Alignment....................................................... 3-2 3.6.1 General......................................................................... 3-2 3.6.2 VT-3/150 Amplifier Adjustment............................................. 3-3 3.6.2.1 General Set-Up....................................................... 3-3 3.6.2.2 Output Power Alarm (Forward Power) ........................... 3-4 3.6.2.3 Output Power ......................................................... 3-5 3.6.2.4 Antenna VSWR Alarm (Reverse Power).......................... 3-5 3.6.2.5 Antenna VSWR Overload........................................... 3-6 3.6.2.6 Procedure Verification............................................... 3-6 ILLUSTRATIONS AND SCHEMATIC DIAGRAMS .................................... 4-1 4.1 VT-3/150 VHF Amplifier Component Layout...................................... 4-2 4.2 VT-3/150 VHF Amplifier Schematic Diagram...................................... 4-3 4.3 VT-3/150 VHF Lowpass Filter Component Layout............................... 4-5 4.4 VT-3/150 VHF Lowpass Filter Schematic Diagram ............................... 4-5 DANIELS DEELECTRONICS VHF Amplifier Instruction Manual VT-3 132 - 174 MHz iii 5 PARTS LISTS...................................................................................5-1 5.1 VT-3/150 Amplifier Electrical Parts List.............................................5-1 5.2 VT-3/150 Low Pass Filter Electrical Parts List .....................................5-3 5.3 VT-3/150 Amplifier Mechanical Parts List ..........................................5-3 REVISION HISTORY..........................................................................6-1 DANIELS DEELECTRONICS iv VHF Amplifier Instruction Manual VT-3 132 - 174 MHz 1 GENERAL 1.1 Introduction The VT-3/150 Amplifier provides the final stage of RF amplification and filtering for the entire VHF Transmitter VT-3 132 - 174 MHz family. The amplifier has two distinct frequency ranges: 132 to 150 MHz, and 150 to 174 MHz with continuously adjustable 2.0 to 8.0 Watts output power. The VT-3/150 Amplifier is housed in a machined aluminum case that ensures optimum RF shielding, provides a good ground, and also acts as a heatsink. Additionally, the VT-3/150 Amplifier is equipped with output power and VSWR sensing lines which can be individually configured as open collector or linear outputs. The internal VSWR sensor protects the amplifier from high antenna VSWR by approximately halving the amplifier's RF gain when a VSWR overload condition is present. Output filtering for the VT-3/150 Amplifier is provided by the VT-3/150 Lowpass Filter Board. The lowpass filter assembly is mounted in a separate compartment of the amplifier case in order to provided maximum attenuation of harmonic and other spurious signals. Refer to Section 4 for the VT-3 132 - 174 MHz VHF amplifier and lowpass filter component layouts and schematic diagrams 1.2 Performance Specification Type: MT-3 series VHF Amplifier module. Compatibility: MT-3 series Transmitter Main Board. Frequency Range: 132 MHz to 150 MHz or 150 MHz to 174 MHz. RF Power Output: adjustable 2.0 to 8.0 Watts RF power Input: nominal level adjustable from +4 dBm to +10 dBm, held within +/- 2 dB of nominal. Ouput Impedance and VSWR:50 Ω, Type N connector; 3:1 max. VSWR. Input /Output Isolation: > 60 dB Duty Cycle: 100%: Continuous operation from -40˚ C to +60˚C. Harmonic Emissions: Less than -80 dBc . DANIELS DEELECTRONICS VHF Amplifier Instruction Manual VT-3 132 - 174 MHz 1-1 Transmitter Mismatch Protection: 20:1 VSWR at all phase angles. Transmitter Alarm: Forward power sense and reverse VSWR; - open collector output (separate or 'OR'ed configuration); -linear output (separate lines only). Operating Temperature Range: -30˚ C to +60˚ C, optional -40˚ C temperature test. Operating Humidity: 95% RH (non-condensing) at +25˚ C. Operating Voltage: +13.8 Vdc Nominal (range +11 to +16 Vdc), +9.5 Vdc Regulated. Transmit Current: 0.7 Amp typical; 1.1 Amp maximum Amplifier Standby Current: less than 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 DEELECTRONICS 1-2 VHF Amplifier Instruction Manual VT-3 132 - 174 MHz 2 THEORY OF OPERATION 2.1 Amplifier Operation A power control circuit monitors the RF output power of amplifier U4 and keeps the power constant. The output power from the high power amplifier will change as the unregulated +13.8 Vdc supply varies. Note that the frequency band does not change how the amplifier operates; it only changes a few component values in the RF circuitry. Power for the VT-3/150 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. The VT-3/150 Amplifier will not use any power from the +13.8 Vdc supply until the amplifier's +9.5 Vdc line is switched on and an RF input signal is present. The synthesizer or crystal control module controls the +9.5 Vdc to the amplifier's circuitry; switching it on by grounding the amplifier's input enable line. The synthesizer or crystal control module will ground the input enable line only when the RF signal from the synthesizer or crystal control module is phase locked. This prevents unwanted spurious emissions during transmitter start-up. A typical start-up sequence is shown below: 1) the transmitter is keyed on (+13.8 Vdc is always present) 2) +9.5 Vdc is switched on by the PTT circuitry and the synthesizer or crystal control module PTT line is pulled low 3) an RF signal is output to the amplifier 4) the amplifier's input enable line is activated 5) the amplifier outputs RF power 2.2 Power Requirements Typical current requirements for the VT-3/150 Amplifier at different power levels are given in the Table 2-3 below. The current drawn from the +9.5 Vdc supply should never exceed 1.2 Amps and the current drawn from the +13.8 Vdc supply should never exceed 1.5 Amps. Table 2-1 VT-3/150 Amplifier Current Consumption Output Power 2.0 W 4.0 W 6.0 W 8.0 W +9.5 Vdc +13.8 Vdc Supply Current Supply Current 0.64 A 0.51 A 0.79 A 0.75 A 0.89 A 0.93 A 1.04 A 1.10 A Note: Current consumption measured at 153 MHz DANIELS DEELECTRONICS VHF Amplifier Instruction Manual VT-3 132 - 174 MHz 2-1 2.3 RF Circuitry The RF circuitry consists of several blocks: a 7 dB input pad (R1, R2, and R3), an RF amplifier module (U4), an output power boosting transistor (Q7), three directional couplers (TL1, TL3, and TL4), and the VT-3/150 Lowpass Filter. The heart of the VT-3/150 Amplifier is RF amplifier module U4. The output of U4 is further amplified by Q1 to a maximum of 8.0 Watts at the antenna connector. The frequency band of the VT-3/150 Amplifier is determined by the operating frequency range of the RF amplifier module U4. Directional couplers (TL1, TL3, and TL4) are used to sample forward and reverse power. The sampled power is used by the sensing and power control circuits to control the amplifier's operation. The final step in the RF path is output filtering and, as mentioned earlier, this is done by the VT-3/150 Lowpass Filter. 2.3.1 VT-3/150 Lowpass Filter The VT-3/150 Lowpass Filter is a 50 ohm, 9 pole, reciprocal filter with a 3 dB cutoff frequency of approximately 185 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. 2.4 Power Control Circuitry The VT-3/150 Amplifier employs a closed loop power control which uses a sample of the forward RF power to control the gain of RF amplifier U4. Op-amp U1b compares the sampled RF voltage to the output power setpoint and generates an error signal which Q3 uses to control the voltage on U4's gain control pin. The output power setpoint is determined by R7, the Output Power Adjust potentiometer. The forward power is sampled by TL1, D5, C14, R13, L6, R12, and C15. The power control circuitry keeps the output power of U4 constant. Therefore the amplifier's output power will fluctuate with variations in the +13.8 Vdc supply voltage. DANIELS DEELECTRONICS 2-2 VHF Amplifier Instruction Manual VT-3 132 - 174 MHz 2.5 Power Sensing Circuitry The VT-3/150 Amplifier is equipped with output power and VSWR sensing lines which can be individually configured as open collector or linear outputs. In open collector configuration, the output is active low, that is, when a fail condition is detected (not enough output power or too high antenna VSWR) the open collector transistor is turned on. In linear configuration, a voltage proportional to the sensed output power or antenna VSWR is output. Both the Output Power Alarm setpoint and the VSWR Alarm setpoint are individually adjustable; however, the Output Power Alarm setpoint must always be adjusted before the VSWR Alarm setpoint. This is because the Output Power Alarm setpoint is used as a reference by the VSWR Alarm circuitry. 2.5.1 Output Power Sense The output power sense circuitry uses directional coupler TL2 to sample some of the forward power. The sampled power is rectified by diode D6 and capacitor C20 and then amplified by op-amp U3b. Op-amp U3b's amplification is controlled by R21, the output power alarm adjust potentiometer. The amplified voltage is then output directly in linear operation (JU1 installed, JU2 not installed) or compared by op-amp U1a which then drives transistors Q4 and Q3 for open collector operation (JU1 not installed, JU2 installed). In open collector configuration, Q3 (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). 2.5.2 VSWR Sense The VSWR sense circuitry uses directional coupler TL3 to sample some of the power reflected from the antenna terminal. The reflected power is rectified by diode D7 and capacitor C25 and then amplified by op-amp U2b. Op-amp U2b's amplification is controlled by R36, the VSWR Alarm Adjust potentiometer. The amplified voltage is then output directly in linear operation (JU4 installed, JU3 not installed) or compared to the output power alarm setpoint by op-amp U3a which then drives transistor Q5 for open collector operation (JU4 not installed, JU3 installed). In open collector configuration, Q5 (the open collector output transistor) is turned on when an alarm condition occurs. The adjustment range for the VSWR Alarm can depending on the setting of R36 (the VSWR Alarm Adjust potentiometer). DANIELS DEELECTRONICS VHF Amplifier Instruction Manual VT-3 132 - 174 MHz 2-3 2.5.3 VSWR Overload The VSWR overload circuit protects the VT-3/150 Amplifier from excessive antenna VSWR by reducing the amplifier's gain (output power) when an overload condition occurs. The VSWR overload circuit (R14, R37, R39, R40, U2a, and Q6) is an extension of the VSWR sense circuit and operates the same as the VSWR sense open collector circuit. The VSWR Overload Adjust potentiometer (R37) reduces the voltage level of the VSWR Alarm Setpoint. The voltage set by R37 is the compared to the output power alarm setpoint by op-amp U2a which then drives transistor Q6. When transistor Q6 turns on, signaling an overload condition, resistor R14 is grounded which reduces the output power setpoint. Reducing the output power setpoint lowers the VT-3/150 Amplifier's gain and protects the amplifiers from excessive current draw resulting from high antenna VSWR. The VSWR overload circuit's range of adjustment depends on the setting of the VSWR Alarm Adjust potentiometer (R36). The VSWR overload transistor Q6 can be activated at the same point at which the VSWR alarm becomes active or the VSWR overload circuit can be disabled by turning R37 completely counterclockwise. DANIELS DEELECTRONICS 2-4 VHF Amplifier Instruction Manual VT-3 132 - 174 MHz 3 VT-3/150 AMPLIFIER ALIGNMENT 3.1 General Connections to the power supply, alarm and transmit enable lines (ENA), are clearly marked on the amplifier case. The amplifier is enabled when the enable line (ENA) is grounded. If the amplifier is installed in the transmitter, alignment is simplified by using an SR-3 Subrack, SM-3 System Monitor, and RF extender cable to provide transmitter power and signal interconnection (see the Transmitter Main Board Manual for details). For complete transmitter alignment, the Transmitter Main Board, Synthesizer, Amplifier, and Audio Processor should be tuned in the aforementioned order. Please refer the corresponding manuals for each module. If the input RF level is not changed, adjustments to the output power and alarm thresholds may be made without removing the amplifier cover. However, in the case of a complete amplifier alignment, the amplifier should be separated from the Transmitter Main Board and the amplifier cover removed to expose all amplifier circuitry. All jumpers and test points are clearly marked. 3.2 Repair Note The VT-3/150 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. When removing Surface Mount Solder Jumpers, it is recommended to use solder braid in place of manual vacuum type desoldering tools when removing jumpers. This will help prevent damage to the circuitboards. 3.3 Recommended Test Equipment List Alignment of the transmitter requires the following test equipment or its equivalent. Dual Power Supply: Oscilloscope / Multimeter: Current Meter: Radio communications test set : VSWR 3:1 mismatch load: coaxial test cable set Alignment Tool: Regulated +9.5 Vdc at 0.1 A. Regulated +13.8 Vdc at 2 A - Topward TPS-4000 Fluke 97 Scopemeter Fluke 75 multimeter Marconi Instruments 2955R JFW 50T-035-3.0:1 three 50 Ω cables of incremental length 20 to 40 cm Johanson 4192 DANIELS DEELECTRONICS VHF Amplifier Instruction Manual VT-3 132 - 174 MHz 3-1 It is recommended that the radio communications test set be frequency locked to an external reference (WWVH, GPS, Loran C) so that the high stability oscillator may be accurately set to within its ±1 ppm frequency tolerance. 3.4 Printed Circuitboard Numbering Convention To ease troubleshooting and maintenance procedures, Daniels Electronics Limited has adopted a printed circuitboard (PCB) numbering convention in which the last two digits of the circuitboard number represent the circuitboard version. For example: • PCB number 43-912010 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. 3.5 Standard Factory Settings and Jumper Configuration The VT-3/150 Amplifier is factory configured as follows: • Open collector configuration for Output Power Alarm. • Open collector configuration for Antenna VSWR Alarm. The corresponding jumper settings are: • Jumper JU1: not installed • Jumper JU2: installed • Jumper JU3: installed • Jumper JU4: not installed Output power alarm - linear output Output power alarm - open collector output Antenna VSWR alarm - open collector output Antenna VSWR alarm - linear output 3.6 VT-3/150 Amplifier Alignment 3.6.1 General The VT-3/150 Amplifier is a frequency sensitive module that is factory assembled to operate in one of two frequency bands: 132 to 150 MHz or 150 to 174 MHz. The amplifier requires 7 dBm of input power and is continuously adjustable over the its power range of 2.0 to 8.0 Watts. The VT-3/150 Amplifier provides Output Power and Antenna VSWR Alarm outputs which can be configured for open collector output or linear operation. The amplifier's output power level and alarm levels can be set without detaching the amplifier from the transmitter board. However, to change the configuration of the output power alarm or the Antenna VSWR alarm, the VT-3/150 Amplifier must be detached from the MT-3 Transmitter Board. Refer to page 4-2 "VT-3/150 VHF Amplifier Component Layout" for the location of solder jumpers JU1 to JU4. DANIELS DEELECTRONICS 3-2 VHF Amplifier Instruction Manual VT-3 132 - 174 MHz 3.6.2 VT-3/150 Amplifier Adjustment The Amplifier alignment consists of two adjustment procedures; (i) a general set up (section 3.6.2.1) procedure which sets up the proper bias conditions for the RF transistors and (ii) the RF threshold adjustments which set up the desired alarm threshold levels as well as the RF output power. The general alignment procedure is required following major repair operations, changes in RF input levels or large changes in operating frequency (greater than ± 1.0 MHz). The RF output and alarm threshold level adjustments are more easily accessible so that fine adjustments can be made in the field. Depending on user requirements, the RF alarm threshold levels should be checked whenever a significant change in operating frequency (± 0.5 MHz) is made. As the antenna VSWR alarm is dependent on the output power alarm, the output power alarm should always be set first. The order of adjustment should be: 1) 2) 3) 4) Set the desired output power alarm level (section 3.6.2.2). Set the output power (section 3.6.2.3). Set the desired Antenna VSWR alarm level (section 3.6.2.4). Set the desired overload condition level (section 3.6.2.5). Details for the alignment steps are outlined below. 3.6.2.1 General Set-Up All of the setup steps detailed below are performed at the factory as part of the initial Transmitter alignment. A general realignment of the Amplifier Module will be required under the following conditions: (i) the nominal RF input power applied to the amplifier is changed from that which the amplifier was intially set up for, and (ii) components, particularly the RF transistors Q1 and Q2, are replaced during a repair operation. 1. Connect the transmitter's antenna output connector to the type N input of the radio communications test set through a short section of low loss 50 Ω coaxial cable. 2. Turn all four (4) of the adjustment potentiometers (R7, R21, R36, and R37) fully counterclockwise. 3. Turn on the power to the transmitter. DANIELS DEELECTRONICS VHF Amplifier Instruction Manual VT-3 132 - 174 MHz 3-3 4. Monitor the +9.5 Vdc and 13.8 Vdc supply current and adjust R7, the output power adjustment, so that approximately 1 Amp is being drawn on the +9.5 Vdc line and 1.3 Amps or less is being drawn on the 13.8 Vdc line. This should produce approximately 8 Watts. 5. If only a 6 or 7 watt output is obtained, adjust the low pass filter coil pairs L2/L3 and L1/L4 to obtain 8 watts. 3.6.2.2 Output Power Alarm (Forward Power) Open Collector Output * note: the output power alarm output is factory configured as an open collector output so a pull-up resistor may be required on transmitter pin B26 if one is not already present. 1. Adjust R7, the output power adjustment, to the output power at which the Output Power Alarm is to be activated. 2. Monitor transmitter pin B26, the Output Power Alarm line, and slowly turn R21, the output power alarm adjustment, clockwise until pin B26 goes low. The alarm is now set for the current output power of the transmitter. Linear Output 1. Open the amplifier case to disable (open circuit) jumper JU2 and enable (short) jumper JU1. 2. Monitor transmitter pin B26 with a voltmeter. 3. Adjust R7, the output power adjustment, for full transmitter output power. 4. Adjust R21, the output power alarm adjustment, so that the voltmeter indicates +7.5 Vdc for full transmitter output power. 5. Turn R7, the output power adjustment, fully counterclockwise. The voltmeter should read approximately +3 Vdc. 6. Disconnect the voltmeter. DANIELS DEELECTRONICS 3-4 VHF Amplifier Instruction Manual VT-3 132 - 174 MHz 3.6.2.3 1. Output Power Turn R7, the output power adjustment, clockwise to the desired transmitter output power. 3.6.2.4 Antenna VSWR Alarm (Reverse Power) Open Collector Output * note: the antenna VSWR alarm output is factory configured as an open collector output so a pull-up resistor may be required on transmitter pin Z26 if one is not already present. The output power alarm must be set first before the antenna VSWR alarm can be set. 1. Disconnect the radio communications test and terminate the transmitter with the 3:1 mismatch load. 2. Monitor pin Z26, the Antenna VSWR Alarm line, and turn R36 fully counterclockwise. Pin Z26 should be high. Slowly turn R36 clockwise until pin Z26 is pulled low. Put the 50 ohm load back on again, Pin Z26 should go high. The reverse power trip point is now set for a VSWR of 3:1. Linear Output 1. Open the amplifier case to disable (open circuit) jumper JU3 and enable (short) jumper JU4. 2. Monitor transmitter pin Z26 with a voltmeter. 3. Disconnect the radio communications test set and terminate the transmitter with the 3:1 mismatch load. 4. Adjust R36, the VSWR alarm adjustment, so that the voltmeter indicates +5 Vdc for a 3:1 mismatch. 5. Put the 50 ohm load back on again. The voltmeter should read approximately 0 Vdc. 6. Disconnect the voltmeter. DANIELS DEELECTRONICS VHF Amplifier Instruction Manual VT-3 132 - 174 MHz 3-5 3.6.2.5 Antenna VSWR Overload 1. Disconnect the radio communications test set and so that the amplifier is terminated with an open circuit. 2. Monitor the current from the +9.5 Vdc supply. 3. Adjust R37, the VSWR overload adjustment, clockwise until a noticeable drop in the +9.5 Vdc current occurs. 4. Reconnect the radio communications test set and, the +9.5 Vdc current should return to the previous level. 3.6.2.6 Procedure Verification 1. 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 RF output power (8 Watts). 2. Turn off the power to the transmitter. DANIELS DEELECTRONICS 3-6 VHF Amplifier Instruction Manual VT-3 132 - 174 MHz 4 ILLUSTRATIONS AND SCHEMATIC DIAGRAMS This Page Intentionally Left Blank DANIELS DE ELECTRONICS 4-1 VHF Amplifier Instruction Manual VT-3 132 - 174 MHz 4.1 VT-3/150 VHF Amplifier Component Layout MBZ5233B R37 50K JU3 R21 50K JU4 R36 50K R38 Q5 PZT2222A 1K JU1 R7 50K R25 1K JU2 R6 27K4 R14 10K R4 D1 R5 4K53 C13 100n R8 3K48 10n C14 MMBD701 D7 Q6 10K R41 Q1 IRF9540 R10 10K C12 10nF 27K4 U1 R28 R29 Q3 MC 10K 33172 PZT2222A R9 Q4 R31 10K C17 10n 10K 49K9 BC817-25 C15 10n R11 R12 10K R27 49K9 R30 JU5 49K9 R26 49K9 C39 2.2nF TL5 R39 1K 49K9 C25 150p L2 0.18uH D3 BYD17J C10 10nF LOW PASS FILTER ASSEMBLY C22 10n R20 R24 1K TL2 10K R22 49K9 C18 C21 10n 100n R23 49K9 R19 49K9 C19 10n D6 COMPONENT INSTALLED ON BOTTOM OF BOARD C5 18nF COMPONENT NOT INSTALLED SELECT C31 C33 COMPONENT MOUNTED ON CASE C32 R17 SELECT SELECT 49R9 L8 19nH C35 SELECT R45 10R NOTE Q1 MOUNTED ON CASE WITH LEADS INSERTED TO BOTTOM OF BOARD C34 SELECT L9 150nH R16 49R9 FB2 M3 x 8 CAP SOCK SCREW L10 150nH L11 19nH C30 47uF M3 x 8 SCREW M3 x 6 CAP SOCK SCREW C27 SELECT C28 C37 1nF 4-2 FB3 100nF SELECT C38 DANIELS DE ELECTRONICS M2.5 x 6 SCREW MRF262 SELECT C36 TL4 MMBD701 L6 R18 C20 1.5uH 49K9 150p C6 4.7uF MMBD701 150pF D5 C16 49R9 R15 DEFAULT JUMPER TL1 R42 1K C23 10n R44 R32 R43 27K4 10K 10K U3 MC 33172 MHW607 SELECT 150nH R35 1K VT-3/150 C3 18nF C4 18nF L4 49K9 R33 TL3 BC817-25 R40 L7 221K 1.5uH R34 49K9 U2 MC C24 C26 10n 33172 100n L3 0.18uH C2 18nF FB1 C9 18nF L5 1.5uH R13 49K9 L1 0.18uH C11 100nF C7 100nF Q2 D5P06V C1 1nF R1 R3 178R 1nF C8 D2 1N5402 D4 BYD17J 30R1 178R R2 C29 10nF DANIELS ELECTRONICS VICTORIA B.C . VT3AMPM1 VT-3/150 VT-3/150AMPLIFIER AMPLIFIER AMPLIFIERSM TH SMDESIGNATION LAYOUT DESIGNATION LAYOUT AND (LOW (LOW (HIGH DESIGNATION (HIGH (LOW POWER) (LOW POWER) POWER) POWER) POWER) POWER) (HIGH POWER) TITLE: VT-3/150 DATE.: DWG No: MARCH 8, 1994 BOARD No.: 43-932611 VHF Amplifier Instruction Manual VT-3 132 - 174 MHz 9326AS2 9326AS1 9326AS3 9326AS4 9326A5 9326A6 DWG REV DATE: 4.2 VT-3/150 VHF Amplifier Schematic Diagram +13.8 VDC LOW / HIGH BAND FIL5* +13.8 VDC LPF +13.8 VDC C1 1nF R1 30R1 R2 178R R3 178R C4 18nF C2 18nF TO ALL SWITCHED +9.5V FIL2 +9.5 VDC LPF R4 49k9 AMPLIFIER ENABLE I/P C27 100nF FB3* L8 19nH R45 10R L4 150nH L3 180nH R15 49R9 TL2 Q7 MRF262 C33 68pF LB/51pF HB C35 SELECT LB = LOW BAND HB = HIGH BAND FB1 C8 1nF C7 100nF C9 18nF Q1 IRF9540 C10 10nF R7 50k D5 MMBD701 C12 10nF C39 2.2 nF R8 3k48 FORWARD POWER ALARM FIL3 R9 10k0 C19 10nF U3b MC33172 R31 10k0 LPF L5 1.5uH R13 49k9 Q4 BC817-25 C16 150pF R12 49k9 U1a R25 1k00 R22 49k9 U1b MC33172 RF OUT D7 MMBD701 R19 49k9 R21 50k R28 27k4 J2 TYPE N JACK TL5 C21 10nF R29 10k0 Q3 PZT2222A L6 1.5uH C17 10nF R30 49k9 JU2 C18 100nF C14 10nF POWER C11 100nF TL3 R18 49k9 R26 49k9 R27 49k9 SWITCHED +9.5V C13 100nF OUTPUT POWER ADJUST SWITCHED +9.5V Q2 D5P06V SWITCHED +9.5V R6 SEL SWITCHED +9.5V R10 10k0 C20 150pF R17 49R9 R24 1k00 D4 BYD17J R5 4k53 D6 MMBD701 JU1 L2 180nH D3 BYD17J Power Range Selection R16 49R9 TP2 D2 IN5402 D1 MBZ5233B C37 47pF LB/36pF HB L9 150nH FB2 C6 4.7uF C29 1nF C38 56pF LB/220pF HB C36 47pF LB/43pF HB C32 5.6pF LB C5 18nF C28 10nF L11 19nH C34 20pF LB LPF 27k4 392k TP1 C3 18nF L1 180nH FIL1 R6 C31 51pF LB/24pF HB TL1 MHW 607 RF IN (1 mW) L10 150nH U4 MHW607 J1 SMB C30 47uF LPF R20 10k0 FORWARD OUTPUT ALARM ADJUST C25 150pF SWITCHED +9.5V C15 10nF JU5 R11 10k0 2 - 8 Watts 2 - 5 Watts TP3 R32 10k0 R14 10k0 VSWR ALARM FIL4 JU3 LPF C23 10nF R23 49k9 Q5 PZT2222A TP4 L7 1.5uH U2b MC33172 R44 10k0 R33 49k9 C24 100nF C22 10nF U3a R42 1k00 R34 49k9 C26 10nF R43 27k4 JU4 R38 1k00 R36 50k TP5 OVERLOAD R41 10k0 U2a VSWR OUTPUT ALARM ADJUST OVERLOAD ADJUST Q6 BC817-25 R35 1k00 R37 50k R39 1k00 R40 221k HIGHEST REFERENCE DESIGNATORS C39 D7 FB3, FIL5 J2, JU5 L11 Q7 R45 TL5, TP5 U4 UNUSED REFERENCE DESIGNATORS DANIELS DE ELECTRONICS VHF Amplifier Instruction Manual VT-3 132 - 174 MHz ----- ----- ----- ----- ----- ----- ----- ----- ----- DE DANIELS ELECTRONICS TITLE: DATE: 4 MARCH 1994 DWG No: VT3AMPM2A BOARD No: VICTORIA B.C. VT-3/150 VHF AMPLIFIER SCHEMATIC DIAGRAM 43-932611 DWN BY: REX WONG APRVD: DWG REV DATE: 10 DECEMBER 1995 BOARD REV: 1.1 4-3 This Page Intentionally Left Blank DANIELS DE ELECTRONICS 4-4 VHF Amplifier Instruction Manual VT-3 132 - 174 MHz 4.3 VT-3/150 VHF Lowpass Filter Component Layout 4.4 VT-3/150 VHF Lowpass Filter Schematic Diagram DANIELS DEELECTRONICS VHF Amplifier Instruction Manual VT-3 132 - 174 MHz 4-5 This Page Intentionally Left Blank DANIELS DEELECTRONICS 4-6 VHF Amplifier Instruction Manual VT-3 132 - 174 MHz 5 PARTS LISTS 5.1 VT-3/150 Amplifier Electrical Parts List Ref Desig Description Part No. C1 C2-C5 C6 C7 C8 C9 C10 C11 C12 C13 C14, C15 C16 C17 C18 C19 C20 C21-C23 C24 C25 C26 C27 C28 C29 C30 C31 C31 C32 C32 C33 C33 C34 C34 C35 C35 C36 C36 C37 C37 C38 C38 C39 CAP., SM, 1nF CER, 1206, C0G CAP., SM, 18nF CER, 1206, X7R CAP., SM, 4.7µF TANT., 10%, 16V CAP., SM, 100nF CER, 1206, X7R CAP., SM, 1nF CER, 1206, C0G CAP., SM, 18nF CER, 1206, X7R CAP., SM, 10nF CER, 1206, X7R CAP., SM, 100nF CER, 1206, X7R CAP., SM, 10nF CER, 1206, X7R CAP., SM, 100nF CER, 1206, X7R CAP., SM, 10nF CER, 1206, X7R CAP., SM, 150pF CER, 1206, C0G CAP., SM, 10nF CER, 1206, X7R CAP., SM, 100nF CER, 1206, X7R CAP., SM, 10nF CER, 1206, X7R CAP., SM, 150pF CER, 1206, C0G CAP., SM, 10nF CER, 1206, X7R CAP., SM, 100nF CER, 1206, X7R CAP., SM, 150pF CER, 1206, C0G CAP., SM, 10nF CER, 1206, X7R CAP., SM, 100nF CER, 1206, X7R CAP., SM, 10nF CER, 1206, X7R CAP., SM, 1nF CER, 1206, C0G CAP., 47µF DIP. TANT., 20%, 35V CAP.,SM, 51pF PORCEL., 5% 500V CAP.,SM, 24pF PORCEL., 5% 500V CAP.,SM, 5.6pF PORCEL., ±0.25pF 500V CAP.,SM, NOT INSTALLED CAP.,SM, 68pF PORCEL., 5% 500V CAP.,SM, 51pF PORCEL., 5% 500V CAP.,SM, 20pF PORCEL., 5% 500V CAP.,SM, NOT INSTALLED CAP., 330pF METAL CLAD,1% 250V CAP., 270pF METAL CLAD, 1% 250V CAP.,SM, 47pF PORCEL., 5% 500V CAP.,SM, 43pF PORCEL., 5% 500V CAP.,SM, 47pF PORCEL., 5% 500V CAP.,SM, 36pF PORCEL., 5% 500V CAP.,SM, 56pF PORCEL., 5% 500V CAP.,SM, 220pF PORCEL., 5% 200V CAP., 2.2nF FILM, MMK5,10%,63V 1008-3B102K1G 1008-4B183K5R 1055-5B475K16 1008-5B104K5R 1008-3B102K1G 1008-4B183K5R 1008-4B103K5R 1008-5B104K5R 1008-4B103K5R 1008-5B104K5R 1008-4B103K5R 1008-2B151J1G 1008-4B103K5R 1008-5B104K5R 1008-4B103K5R 1008-2B151J1G 1008-4B103K5R 1008-5B104K5R 1008-2B151J1G 1008-4B103K5R 1008-5B104K5R 1008-4B103K5R 1008-3B102K1G 1054-6M476M35 1036-1B2510J5 1036-1B2240J5 1036-0B2569C5 NOT INSTALLED 1036-1B2680J5 1036-1B2510J5 1036-1B2200J5 NOT INSTALLED 1046-2A331FDB 1046-2A27TFDB 1036-1B2470J5 1036-1B2430J5 1036-1B2470J5 1036-1B2360J5 1036-1B2560J5 1036-2B2221J2 1016-3A222K63 D1 D2 D3, D4 D5 D6, D7 DIODE, MBZ5233B 6.0V ZENER, SOT-23 DIODE, IN5402 3A RECT, DO-201AD DIODE, BYD17J RECTIFIER, SOD-87 DIODE, MMBD701 HOT CARRIER, SOT-23 DIODE, MMBD701 HOT CARRIER, SOT-23 2102-MBZ5233B 2001-1N540200 2101-BYD17J00 2105-MMBD7010 2105-MMBD7010 (132 - 150 (150 - 174 (132 - 150 (150 - 174 (132 - 150 (150 - 174 (132 - 150 (150 - 174 (132 - 150 (150 - 174 (132 - 150 (150 - 174 (132 - 150 (150 - 174 (132 - 150 (150 - 174 MHz) MHz) MHz) MHz) MHz) MHz) MHz) MHz) MHz) MHz) MHz) MHz) MHz) MHz) MHz) MHz) DANIELS DEELECTRONICS VHF Amplifier Instruction Manual VT-3 132 - 174 MHz 5-1 Ref Desig Description Part No. FB1 FB2, FB3 FIL1-FIL5 FERRITE BEAD, SM, 43 MIX 1812 PKG FERRITE BEAD, 64MIX 3X3.5mm OD FILTER, EMI PI/5500pF, 8-32 UNC 1213-43181200 1210-64030350 1302-P552D10D J1 J2 CONNECTOR, SMB, JACK,2 HOLE FLANGE CONNECTOR, N JACK PANEL MNT, C/SNK 5120-J2SC01BG 5184-10923011 L1-L3 L4 L5 L6, L7 L8 L9 L10 L11 LPF1 INDUCTOR, SM., 180nH 20%, 1812 CHOKE, RF/MOULD., 150nH 10%, .37 INDUCTOR, SM, 1.5µH 10%, 1812 INDUCTOR, SM, 1.5µH 10%, 1812 COIL, 1.5 TURNS, 18AWG, 3.83mmID CHOKE, RF/MOULD., 150nH 10%, .25 CHOKE, RF/MOULD., 150nH 10%, .37 COIL, 1.5 TURNS, 18AWG, 3.83mmID LPF, ASSEMBLY VT-3/150 AMPLIFIER 1255-2GR1800M 1251-2B00R15K 1255-3G1R500K 1255-3G1R500K 1220-1T501812 1251-2A00R15K 1251-2B00R15K 1220-1T501812 A21-LPF3/150 PCB PCB, VT-3/150 TX AMPLIFIER 4321-15932611 Q1 Q2 Q3 Q4 Q5 Q6 Q7 MOSFET, IRF9540 P-CHANNEL, TO-220 MOSFET, D5P06V P-CHAN., DPAK TRANSISTOR, PZT2222A NPN, SOT-223 TRANSISTOR, BC817-25 NPN, SOT-23 TRANSISTOR, PZT2222A NPN, SOT-223 TRANSISTOR, BC817-25 NPN, SOT-23 TRANSISTOR, MRF262 VHF, TO-220 2044-IRF95400 2144-D5P06V00 2120-PZT2222A 2120-BC817025 2120-PZT2222A 2120-BC817025 2025-MRF26200 R1 R2, R3 R4 R5 R6 R6 R7 R8 R9-R11 R12, R13 R14 R15-R17 R18, R19 R20 R21 R22, R23 R24, R25 R26, R27 R28 R29 R30 R31, R32 R33, R34 R35 R36, R37 RES., SM, 30R1 1206, 1%,100ppm RES., SM, 178R 1206, 1%,100ppm RES., SM, 49k9 1206, 1%, 100ppm RES., SM, 4k53 1206, 1%, 100ppm RES., SM, 27k4 1206, 1%, 100ppm RES., SM, 392k 1206, 1%, 100ppm POT., SM, 50k 12 TURN, SIDE ADJUST RES., SM, 3k48 1206, 1%, 100ppm RES., SM, 10k0 1206, 1%, 100ppm RES., SM, 49k9 1206, 1%, 100ppm RES., SM, 10k0 1206, 1%, 100ppm RES., SM, 49R9 1206, 1%, 100ppm RES., SM, 49k9 1206, 1%, 100ppm RES., SM, 10k0 1206, 1%, 100ppm POT., SM, 50k 12 TURN, SIDE ADJUST RES., SM, 49k9 1206, 1%, 100ppm RES., SM, 1k00 1206, 1%, 100ppm RES., SM, 49k9 1206, 1%, 100ppm RES., SM, 27k4 1206, 1%, 100ppm RES., SM, 10k0 1206, 1%, 100ppm RES., SM, 49k9 1206, 1%, 100ppm RES., SM, 10k0 1206, 1%, 100ppm RES., SM, 49k9 1206, 1%, 100ppm RES., SM, 1k00 1206, 1%, 100ppm POT., SM, 50k 12 TURN, SIDE ADJUST 1150-1B30R1FP 1150-2B1780FP 1150-4B4992FP 1150-3B4531FP 1150-4B2742FP 1150-4B3922FP 1172-M30503X5 1150-3B3481FP 1150-4B1002FP 1150-4B4992FP 1150-4B1002FP 1150-1B49R9FP 1150-4B4992FP 1150-4B1002FP 1172-M30503X5 1150-4B4992FP 1150-3B1001FP 1150-4B4992FP 1150-4B2742FP 1150-4B1002FP 1150-4B4992FP 1150-4B1002FP 1150-4B4992FP 1150-3B1001FP 1172-M30503X5 (Default) (Exciter for VT-30) DANIELS DEELECTRONICS 5-2 VHF Amplifier Instruction Manual VT-3 132 - 174 MHz Ref Desig Description Part No. R38, R39 R40 R41 R42 R43 R44 R45 RES., SM, 1k00 1206, 1%, 100ppm RES., SM, 221k 1206, 1%, 100ppm RES., SM, 10k0 1206, 1%, 100ppm RES., SM, 1k00 1206, 1%, 100ppm RES., SM, 27k4 1206, 1%, 100ppm RES., SM, 10k0 1206, 1%, 100ppm RES., 10R METAL FILM, 5%, 0.5W 1150-3B1001FP 1150-5B2213FP 1150-4B1002FP 1150-3B1001FP 1150-4B2742FP 1150-4B1002FP 1101-1A0100JP TL1 TL2, TL3 TL5 COAX, DIRECTIONAL COUPLER 0.5" COAX, DIRECTIONAL COUPLER 0.5" COAX, CONFORMABLE 31.5mm, 50 OHM, 0.083 7496-30CR005T 7496-30CR005T 7482-5024T083 U1-U3 U4 U4 I.C., MC33172 DUAL OP AMP, S0-8 AMP, RF,MHW607-1,7W,136-154MHz AMP, RF,MHW607-2,7W,146-174MHz 2302-33172N08 2256-MHW60701 2256-MHW60702 5.2 VT-3/150 Low Pass Filter Electrical Parts List Ref Desig Description Part No. C1 C2-C4 C5 CAP., SM, 30pF PORCEL., 5%, 500V CAP., SM, 47pF PORCEL., 5%, 500V CAP., SM, 30pF PORCEL., 5%, 500V 1036-1B2300J5 1036-1B2470J5 1036-1B2300J5 L1 L2, L3 L4 COIL, 55nH 3.0 TURNS, 18AWG, 6.70mm ID COIL, 60nH 3.0 TURNS, 18AWG, 6.70mm ID COIL, 55nH 3.0 TURNS, 18AWG, 6.70mm ID 1220-3T001822 1220-3T001822 1220-3T001822 PCB PCB, LPF VT-3/150, UT-3/400 AMP 4321-16931712 5.3 VT-3/150 Amplifier Mechanical Parts List Description Part No. Qty. CASE, MT-3 VHF/UHF AMPLIFIER, ALUMINUM 3702-66102130 HEATSHRINK, 1/8" DIA, RED, 1" LENGTH CONSUMABLE INSULATOR, THERM. COND. TO-220 5622-1T220701 LABEL, MTL/PE, VT-3/150 AMP ID LID, CASE MT-3 AMPLIFIER, ALUMINUM 3508-21002010 3702-66102151 SCREW, M2 X 6, PAN/PHILLIPS,A2 SCREW, M2 X 4, PAN/PHIL., S/S SCREW, M2.5 X 6, PAN/PHIL., S/S SCREW, M3 X 6, FLAT/PHIL., S/S SCREW, M3 X 8, PAN/PHIL., S/S 5812-2M0PP06S 5812-2M0PP04S 5812-2M5PP06S 5812-3M0FP06S 5812-3M0PP08S 10 (132 - 150 MHz) (150 - 174 MHz) DANIELS DEELECTRONICS VHF Amplifier Instruction Manual VT-3 132 - 174 MHz 5-3 Description Part No. Qty. SCREW, M3 X 8, CAP SOCK-M2.5, S/S SCREW, M3 X 8, CAP SOCK-M2.5, S/S SET SCREW, M3 X 3, HEX SOCKET, A2 SHOULDER WASHER, M3 0.24" OD, NYLON 5812-3M0SA08S 5812-3M0SA08S 5817-3M0AC03S 5674-120N2440 TUBING, TFE-260C, 22AWG,Thin 5mm TURRET TERMINAL, 4-40 0.188L, Tn 7610-260C22TW 5053-144M188T WIRE, PVC/STRANDED 16AWG, RED, 70 mm 7110-16S26302 DANIELS DEELECTRONICS 5-4 VHF Amplifier Instruction Manual VT-3 132 - 174 MHz 6 REVISION HISTORY ISSUE DATE REVISION Jul 97 First Issue. DANIELS DEELECTRONICS VHF Amplifier Instruction Manual VT-3 132 - 174 MHz 6-1 ISSUE DATE REVISION DANIELS DEELECTRONICS 6-2 VHF Amplifier Instruction Manual VT-3 132 - 174 MHz
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