RF Technology Eclipse PA220 User manual

Eclipse Series
RF Technology
[e-mail]
SEPTEMBER 2003
PA220 Amplifier
Operation and Maintenance Manual
This manual is produced by RF Technology Pty Ltd
10/8 Leighton Place, Hornsby 2077 Australia
Copyright © 2001 RF Technology Pty Ltd

Page 2 RF Technology PA220
CONTENTS CONTENTS
Contents
1Operating Instructions 4
1.1 Installation 4
1.1.1
Sub-rack Wiring Guidelines
4
1.2 Front Panel Indicators 4
1.3 Internal Adjustments 5
1.4
Amplifier I/O Connections
5
1.4.1 RF Input 5
1.4.2 RF Output 5
1.4.3 25 Pin Connector 6
2Circuit Description 6
2.1 Amplifiers 6
2.2 Power Splitter / Combiners 7
2.3 Directional Coupler 7
2.4 Low Pass Filter 7
2.5 Power Control Circuits 7
2.6 RF Output Indicator 8
2.7 Over Temperature Protection 8
3Field Alignment Procedures 8
3.1 Output Power Level 8
3.2 Tuning Procedure 9
4Specifications 9
4.1 Description 9
4.2
Physical Configuration
10
4.3 Front Panel Indicators and Test Points 10
4.3.1 Indicators 10
4.3.2 Test Points 10
4.4
Electrical Specifications
10
4.4.1 Power Requirements 10
4.4.2 Frequency Range 10
4.5 Antenna Impedance 11
4.6 Output Power 11
4.6.1
Transmit Duty Cycle
11
4.7 Spurious and Harmonics 11
4.8 Heatsink Temperature 11
4.9 ALC Output 11
4.10 Connectors 11
4.10.1 RF Input 11
4.10.2 RF Output 12
4.10.3 25-Pin Connector 12
4.10.4 9-Pin Connector 12

RF Technology PA220 Page 3
CONTENTS CONTENTS
AEngineering Diagrams 12
A.1 Block Diagram 12
A.2 Circuit Diagrams 12
A.3 Component Overlay Diagrams 12
BParts List 17

Page 4 RF Technology PA220
1 OPERATING INSTRUCTIONS
1Operating Instructions
The PA220 is part of the Eclipse range of modular base station equipment. It is a power
amplifier capable of delivering 100 Watts in the VHF frequency range. It is designed
to complement the T220 transmitter, and mounts in a standard Eclipse sub-rack.
1.1 Installation
There are no front panel controls. In normal circumstances no alignment or setup is
required. If mounted in a sub-rack that has not previously been wired for a power
amplifier, the rack connector must be wired according to the guidelines in section 1.1.1
below.
1.1.1 Sub-rack Wiring Guidelines
When installing an Eclipse Power Amplifier in an Eclipse sub-rack, observe the
following guidelines for sub-rack installation:
•The sub-rack power supply must be capable of delivering the full current
requirements for all modules fitted in the sub-rack, typically 20 Amperes for a
100W transmitter/amplifier.
•Owing to the current drain, power supply lines should be cabled to the power
amplifier separately and using heavy gauge wire to minimise voltage drop and
interference via the power supply of other modules in the rack.
•
The ALC line from the power amplifier must be connected to the ALC input of the
exciter. If this connection is not correctly made, no control of the output power
level will be possible. This can result in excessive RF output power, and
consequent breach of licensing authority regulations, or possible overload of the
unit.
With an Eclipse T220, join pin 8(ALC) on the exciter and the amplifier.
WARNING
Changes or modifications not expressly approved by RF
Technology could void your authority to operate this
equipment. Specifications may vary from those given in
this document in accordance with requirements of local
authorities. RF Technology equipment is subject to
continual improvement and RF Technology reserves the
right to change performance and specification without
further notice.

RF Technology PA220 Page 5
1OPERATING INSTRUCTIONS 1.2 Front Panel Indicators
1.2 Front Panel Indicators
PWR LED The power (PWR) LED shows that the dc supply is connected to the
transmitter.
RFO LED The RF output (RFO) LED indicates that the amplifier is being driven
and that the forward output power is above a preset level. This preset indication
level is generally set 1 - 3 dB below the preset output power level. The presetting
potentiometer RV2 is not accessible without removal of the cover plate.
TEMP LED The temperature (TEMP) LED indicates illuminates should the
amplifier's internal temperature become too high. The RF power is
automatically reduced if the internal temperature rises above safe limits.
1.3 Internal Adjustments
All internal adjustments are factory set and should not need to be changed under normal
conditions. A possible exception to this is the RF output power
level which may need
to be changed to comply with local licensing requirements. The
low forward power
warning circuit should be set at the same time as the forward power level.
WARNING
Ensure that the power setting complies with the
requirements of your licensing authority. Failure to do
so may result in penalties being imposed by the
licensing authority.
Output Power The output power is set by RV2. This is nominally set to 100 Watts
(+50dBm), but may be set to any value between 20 and 100 Watts depending
upon local regulations in the destination country. RV2 determines the threshold
affecting the ALC voltage that is fed back to the transmitter module to regulate
RF output power.
RF Level Detector The forward RF power threshold associated with the RFO LED on
the amplifier front panel is set by RV3. This is nominally set at half to three-
quarters of the preset output power.

Page 6 RF Technology PA220
1.4 Amplifier I/O Connections 2 CIRCUIT DESCRIPTION
1.4 Amplifier I/O Connections
The PA220 has three connectors on the rear panel.
1.4.1 RF Input
The RF drive is delivered via a BNC connector. The absolute maximum power that
should be applied to this connector is 25 Watts.
1.4.2 RF Output
The RF output signal is available from an N-type connector.
Pins Function
1, 2, 14, 15 Positive supply
12, 13, 24, 25
Ground (negative supply)
8ALC output
Table 1: Pin connections for the 25 pin “D” connector on the rear panel
Note: The amplifier is capable of delivering as much as 120 Watts continuously.
In certain conditions1an RF power of 130 Watts or more can be available via this
connector. This corresponds to peak voltages in excess of 100 while currents in
excess of 2 Amperes may flow. Appropriate care should be taken when working
on the PA220 to avoid making or breaking connections when the amplifier is
operating, and to avoid RF burns through close proximity to live connections, etc.
1.4.3 25 Pin Connector
The 25-pin “D” connector provides connection to ground and dc power, and from the
automatic level control (ALC) circuit. The pin connections are given in table 1. The
ALC line floats high to approximately 7Vdc. Pulling this line low will reduce output
power. Voltages below 0.5V will reduce the output by more than 20dB. A pull-down
current of approximately 1mA is required.
2Circuit Description
The following descriptions should be read as an aid to understanding the block and
schematic diagrams shown in figures 1 - 4.
_________________
1
Excessive powers may be available, for example, in the event of a failure of the ALC loop,
such as may arise if the ALC feedback connection is broken.

RF Technology PA220 Page 7
2CIRCUIT DESCRIPTION 2.1 Amplifiers
2.1 Amplifiers
The RF power amplification is provided by two single transistor amplifiers, Q1 and Q2.
Each amplifier is rated at 50 watts output. The input and output impedance of the
transistors is matched to 50Ωby broad band micro-strip matching networks.
Trimmer capacitors C10 and C24 are used on the input networks to optimize the input
match at center of the desired frequency range. Similarly C58 and C59 on the output
networks are used to optimize the output efficiency.
Since the design of the amplifiers allows them to be very broad band, they will not
usually require re-adjustment unless changing frequency from one end of the band to
the other.
The dc supply is fed to the amplifiers through resistors R27 and R28. This allows the
collector current of each amplifier to be measured at the test socket.
2.2 Power Splitter / Combiners
In the 100W models, zero-degree hybrid power splitter / combiners are used to parallel
the two amplifier stages. The hybrids consist of quarter-wave 70Ω
transmission lines
and 100Ω
RF resistors CX1-4, R9 and R10. This configuration provides wider
bandwidth and better balance than lower cost 90-degree hybrids.
2.3 Directional Coupler
The forward and reverse power components are measured through a coupled line
directional coupler. The output of the coupled line is frequency compensated by R13,
R14, C29 and C30 before being detected by D1 and D2.
The output of the detectors is proportional to the forward and reflected voltage
components.
2.4 Low Pass Filter
A low pass filter consisting of L12 - 14 and C39 - 42 reduces the harmonic components
to less than -80dBc. The filter uses a combination of lumped elements and printed
microstrips to obtain the required harmonic attenuation.
2.5 Power Control Circuits
The forward and reverse voltages from the directional coupler are amplified and
inverted by U1a and U1b. The amplified voltages are combined before connecting to
the input of error amplifier U1d.

Page 8 RF Technology PA220
2.6 RF Output Indicator 3 FIELD ALIGNMENT PROCEDURE
Error amplifier U1d compares the detected voltage with the dc reference voltage from
output power trimpot RV1. The amplified difference at the output of U1d is supplied to
the rear panel system connector for connection to the T220 ALC input.
Equipment Type Key Specifications
Power Supply 13.8Vdc,15A
RF Source 25 Watt (eg. T220 exciter)
RF Load / Attenuator 50Ω, 50/100W, SWR<1.2:1
RF Power Meter eg. HP437B or calibrated detector and voltmeter
Table 2:Standard test equipment for the PA220 Power Amplifier
2.6 RF Output Indicator
The forward power voltage is compared with the pre-set dc reference
voltage from RV2
by U1c. The output of U1c is used to turn on the RFO LED and provide an output
power logic signal to the test connector.
RV2 is normally set so that the RFO LED comes ON 1 - 3db below the nominal power
output level.
2.7 Over Temperature Protection
Thermistor RT1 is mounted to the case of output transistor Q1. If the transistor case
temperature rises above 90 Celsius the resistance of RT1 increases and Q5 is turned
ON.
This causes the TEMP LED to come on and also reduces the dc reference voltage to the
output power error amplifier U1d. The input power will then be reduced by the
transmitter ALC circuits and the output transistor is kept within safe operating limits.
3Field Alignment Procedures
3.1 Output Power Level
1. Set the unit up on a bench with the standard test equipment listed in table 2.
2.
Set RV1 and RV2 both fully counter-clockwise.
3. Set the exciter to the desired operating frequency.

RF Technology PA220 Page 9
4SPECIFICATIONS 3.2 Tuning Procedure
4.
Adjust RV1 to set the output power on the meter to the level at which you want the
RFO LED to illuminate.
5. Adjust RV2 until the RFO LED just goes out.
6. Adjust RV1 for the desired output power.
3.2 Tuning Procedure
Adjustment of the matching circuits is carried out with the aim of
•
ensuring that the specified power is available
•balancing the load reasonably equally between the power transistors, and
•
obtaining acceptable efficiency in the power transistors.
Note that the factory alignment procedure is complicated, but allows a given unit to
operate across a full 10% bandwidth, without further adjustment. Alignment without
appropriate equipment can leave the amplifier unstable or otherwise unable to meet
specification. However, the procedure below will usually provide adequate
performance.
1. Disconnect the ALC line.
2.
Set the RF source to deliver 15W at the highest frequency in the band over which
the PA is specified.
3. Measuring the RF output power, adjust C10, C24, C102, C112, C58, C59, C104 and
C114 to obtain maximum output.
4.
Measuring the collector currents of Q1 and Q2 at the test socket, adjust C58 and
C59 to reduce and balance the currents, but keeping the power above the required
level.
5. Proceed to carry out the power setting procedure in section 3.1.
4Specifications
4.1 Description
The PA220 power amplifiers are designed for use with the T220 series transmitters to
provide 100 Watts of RF output. Output power is regulated by connecting the ALC
output to the ALC input of the driving exciter. The drive from the transmitter module is
then automatically adjusted to maintain the required output.

Page 10 RF Technology PA220
4.2 Physical Configuration 4 SPECIFICATIONS
The regulated power level can be preset over a wide guaranteed range from 25 to 100
Watts or more, depending on the available input power and the model.
Sensing circuits are provided to protect the output transistors from excessive
temperature. If the heat sink temperature rises to 80C, the input drive will be reduced to
prevent damage.
4.2 Physical Configuration
The power amplifier is designed to fit in an RF Technology sub-rack within a 19" rack
frame. The installed height is 4 Rack Units (RU), or 178mm, and the depth is 350mm.
The amplifier is
95.25mm or three Eclipse units wide. The amplifier uses an extruded
aluminium heat sink with vertical fins. Heatsink temperature rise is typically 20C at
50W output.
4.3 Front Panel Indicators and Test Points
4.3.1 Indicators
Power: Green LED
RF Power:Yellow LED
Over Temperature:Red LED
4.3.2 Test Points
Forward Power:Voltage to ground, 0 - 4V, uncalibrated (pin 4 - gnd)
Reverse Power:Voltage to ground, 0 - 4V, uncalibrated (pin 3 - gnd)
Collector Currents:
Voltage to positive supply, across 0.1
Ω, ±10% (pins 7 - 1 and 8 - 1).
4.4 Electrical Specifications
4.4.1 Power Requirements
Operating Voltage:10.5 - 16 Volts, with output power reduced below 12.5V
Current Drain:16 Amperes maximum (14 typical) at 100 Watts and 13.5 Volts,
100mA maximum standby
Polarity: Negative Ground

RF Technology PA220 Page 11
4SPECIFICATIONS 4.4.2. Frequency Range
4.4.2 Frequency Range
Model Frequency Range
PA220 215-240MHz
4.5 Antenna Impedance
Nominal load impedance is 50
Ω
SWR 1.5:1 or better. The PA220 will operate with a
VSWR of 2:1 at all phase angles. The forward power will reduce as reverse power rises
above acceptable limits, typically at an SWR of about 2.5:1.
4.6 Output Power
Nominally 100
Watts, preset adjustable from 25 to 100. Gain is typically >5dB.
4.6.1 Transmit Duty Cycle
The transmitter is rated for 100% duty cycle (continuous operation) at 50W output for
air temperature below 40C.
Derate linearly above 40C to 50% at 60C.
The transmitter is rated for 50% duty cycle at 100W output for air temperature below
40C.
Derate linearly above 40C to 5% at 70C.
4.7 Spurious and Harmonics
Less than 1u
W at any harmonic of the transmit frequency.
4.8 Heatsink Temperature
The heatsink temperature can rise to 80C without affecting operation, except for
derating based on air-temperature as noted in section 4.6.1 above. Shutdown will occur
at heatsink temperatures exceeding approximately 90C.
4.9 ALC Output
The ALC is intended for connection to the T220. It supplies a
voltage which decreases
with increasing power or temperature. Voltages below 6V should reduce drive power,
at a rate of approximately 6~dB/Volt, with voltages below 1V producing a minimum of
25~dB attenuation.

Page 12 RF Technology PA220
4.10 Connectors A ENGINEERING DIAGRAMS
4.10 Connectors
4.10.1 RF Input
The RF drive is delivered via a BNC connector. The maximum power that should be
applied to this connector is 32 Watts.
4.10.2 RF Output
The RF output signal is available from an N-type connector.
4.10.3 25-Pin Connector
A 25-pin, D-shell “D” connector is mounted on the rear panel. It provides power
connections and a connection from the automatic level control (ALC) circuit. The pin
connections are given in table 1.
4.10.4 9-Pin Connector
A front-panel, 9-pin, D-shell connector provides analogue voltages for testing purposes.
A
Engineering Diagrams
A.1 Block Diagram
Figure 1 shows the block signal flow diagram of the PA220 amplifier. Figure 2 shows
the
chassis wiring diagram of the PA220 amplifier.
A.2 Circuit Diagrams
Figure 3 shows the detailed circuit diagram of the amplifier with component numbers
and values.
A.3 Component Overlay Diagrams
Figure 5 shows the PCB overlay guides
for the amplifier with component positions.

1234
A B C D
4321
D C B ATitle
Number RevisionSize
Orcad A
Date: 21-Oct-2002 Sheet of File: D:\Protel Files\Work Files\UHF_Manual.ddbDrawn By:
- +
+
+8.0 V.REF.
POWER ADJUST
OUTPUT
DIRECTIONAL COUPLER
FWD.PWR.
REV.PWR.
U1D
ALC OUT
+13.8 Vdc
U2
++
INPUT
+8.0 V.REF.
U1C
C39-C42 L12-L14
SPLITTER COMBINER
D1,D2
50W AMPS
SET DETECT LEVEL
R.F.DET.
REF. REG.
OVER TEMP. DETECTOR
OVER TEMP.
ALC AMP.
FWD. & REV. DETECTOR AMPS.
CX1,CX2,R9* CX3,CX4,R10*
LPF
* NOT USED ON SINGLE TRANSISTOR AMPLIFIERS
U1B U1A
Q5
Q4
RV1
Q1
BNC
RV2
TEMP. R.F.DET.
t
RT1
90 DEG.C.
Q2*
R F Technology Pty Ltd 17/8 Leighton Place, Hornsby, 2077, Australia
9105 (PA350/500) BLOCK DIAGRAM 2
11 JBS after RHM

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D C B ATitle
NumberRevisionSize
OrcadA
Date:3-Aug-1998 Sheetof File:D:\RFT_MasterFiles\..\9105-block.schDrawnBy:
AMPLIFIERPCBASSY11/9105
+13.8 A.L.C. 0V
PWRALCTEMP
LEDPCBASSY11/9106
+13.8 REV.PWR. FWD.PWR. OVERTEMP. IcB IcA
0V
RF.DET.
INPUT
OUTPUT
13 25 12 24 11 23 10 22 9 21 8 20 7 19 6 18 5 17 4 16 3 15 2 14 1
P5 CONNECTORDB25
J3 J1P1
J2P2
P3
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16
P4
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
J5
5 9 4 8 3 7 2 6 1
J6 CONNECTORDB9
D1D2D3
+-+-+-
J1 BNC J2 NType
R41 100
RFTECHNOLOGYPTY.LTD. 10/8LeightonPLace,HORNSBY,2077,Australia
9105 (UHFAMPLIFIER)3
33 JBSafterRHM

PA220 PARTS LIST
RF Technology PA220 Page 17
BPA220 Parts List
B.1 PA220 (05/9105/0220)
Ref. Description Part Number
C1 Capacitor 1N0 5% 63V NPO SM1203 46/3300/01N0
C4 Capacitor 56pF 5% 250V MC Mica 48/3002/056P
C5 Capacitor 56pF 5% 250V MC Mica 48/3002/056P
C6 Capacitor 56pF 5% 250V MC Mica 48/3002/056P
C7 Capacitor 47pF 5% 250V MC Mica 48/3002/047P
C8 Capacitor 27pF 5% 250V MC Mica 48/3002/027P
C9 Capacitor 220pF 20% 100v SM1008 46/3100/220P
C10 Capacitor Trim 2-18pF Hi Temp 49/3001/018P
C11 Capacitor 220pF 20% 100V SM1008 46/3100/220P
C12 Capacitor 91pF 5% 250V MC Mica 48/3002/091P
C13 Capacitor 1N0 5% 63V NPO SM1206 46/3300/01N0
C14 Capacitor 6.8uF 20% 25V 41/2225/06U8
C15 Capacitor 1N0 5% 63V NPO SM1206 46/3300/01N0
C18 Capacitor 56pF 5% 250V MC Mica 48/3002/056P
C19 Capacitor 56pF 5% 250V MC Mica 48/3002/056P
C20 Capacitor 56pF 5% 250V MC Mica 48/3002/056P
C21 Capacitor 47pF 5% 250V MC Mica 48/3002/047P
C22 Capacitor 27pF 5% 250V MC Mica 48/3002/027P
C23 Capacitor 220pF 20% 100V SM1008 46/3100/220P
C24 Capacitor Trim 2-18pF Hi Temp 49/3001/018P
C25 Capacitor 220pF 20% 100V SM1008 46/3100/220P
C26 Capacitor 91uF 5% 250V MC Mica 48/3002/091P
C27 Capacitor 1N0 5% 63V NPO SM1206 46/3300/01N0
C28 Capacitor 6.8uF 20% 25V 41/2225/06U8
C29 Capacitor 10pF 5% 63V NPO SM1206 46/3300/010P
C30 Capacitor 10pF 5% 63V NPO SM1206 46/3300/010P
C31 Capacitor 100pF 5% 63V NPO SM1206 46/3300/100P
C32 Capacitor 100pF 5% 63V NPO SM1206 46/3300/100P
C33 Capacitor 27pF 2% 100V NPO Rad 45/2680/027P
C34 Capacitor 1N0 5% 63V NPO SM1206 46/3300/01N0
C35 Capacitor 27pF 2% 100V NPO Rad 45/2680/027P
C36 Capacitor 10nF 10% 50V X7R Rad 46/2001/010N
C37 Capacitor 27pF 2% 100V NPO Rad 45/2680/027P
C38 Capacitor 100nF 5% 50V NKT Rad 47/2007/100N
C39 Capacitor Soshin 12pF Mica SM1210 48/3003/012P
C40 Capacitor Soshin 27pF Mica SM1210 48/3003/027P
C41 Capacitor Soshin 27pF Mica SM1210 48/3003/027P
C42 Capacitor Soshin 12pF Mica SM1210 48/3003/012P
C43 Capacitor 1N0 5% 63V NPO SM1206 46/3300/01N0
C44 Capacitor 1N0 5% 63V NPO SM1206 46/3300/01N0
C45 Capacitor 100nF 10% 50V X7R Rad 46/2001/100N
C46 Capacitor 10uF 35V Electro Rad 41/2001/010U
C47 Capacitor 27pF 2% 100V NPO Rad 45/2680/027P
C48 Capacitor 27pF 2% 100V NPO Rad 45/2680/027P
C49 Capacitor 27pF 2% 100V NPO Rad 45/2680/027P
C50 Capacitor 27pF 2% 100V NPO Rad 45/2680/027P
C51 Capacitor 10nF 10% 50V X7R Rad 46/2001/010N
C52 Capacitor 1N0 5% 63V NPO SM1206 46/3300/01N0
C53 Capacitor 100N 10% 63V X7R SM1206 46/3310/100N
C54 Capacitor 100N 10% 63V X7R SM1206 46/3310/100N
C55 Capacitor 1N0 5% 63V NPO SM1206 46/3300/01N0
C56 Capacitor 56pF 5% 250V Mica 48/3002/056P
C57 Capacitor 220pF 20% 100V SM1008 46/3100/220P
C58 Capacitor 47pF 5% 250V Mica 48/3002/027P
C58A Capacitor Trim 2-18pF Hi Temp 49/3001/018P
C59 Capacitor 47pF 5% 250V Mica 48/3002/027P

T220 PARTS LIST
Page 18 RF Technology PA220
Ref. Description Part Number
C59A Capacitor Trim 2-18pF Hi Temp 49/3001/018P
C60 Capacitor Trim 2-18pF Hi Temp 49/3001/018P
C61 Capacitor Trim 2-18pF Hi Temp 49/3001/018P
C102 Capacitor Trim 6-100pF Hi Temp 493003/100P
C112 Capacitor Trim 6-100pF Hi Temp 49/3003/100P
CX1 RFT Coaxial Cable, 235mm/RG179 12/0021/0235
CX2 RFT Coaxial Cable, 235mm/RG179 12/0021/0235
CX3 RFT Coaxial Cable, 235mm/RG179 12/0021/0235
CX4 RFT Coaxial Cable, 235mm/RG179 12/0021/0235
D1 Diode BAT17 SOT-23 21/3030/0017
D2 Diode BAT17 SOT-23 21/3030/0017
D5 Diode 1N4148 21/1010/4148
L1 Inductor 1uH Axial 37/2021/001U
L2 Moulded Inductor, 7.5 Turns 37/2021/0007
L3 Moulded Inductor, 7.5 Turns 37/2021/0007
L4 Ferrite Bead 37/1022/0001
L5 6 Hole Choke 37/1021/0001
L6 Inductor 1uH Axial 37/2021/001U
L7 Moulded Inductor, 7.5 Turns 37/2021/0007
L8 Moulded Inductor, 7.5 Turns 37/2021/0007
L9 Ferrite Bead 37/1022/0001
L10 6 Hole Choke 37/1021/0001
L11 Inductor 1uH 10% SM1008 37/3320/01U0
L12 2.5T 37/2635/0002
L13 2.5T 37/2635/0002
L14 2.5T 37/2635/0002
P1 6.35 QC Tab 35/0635/0001
P3 6.35 QC Tab 35/0635/0001
P4 16 Way Shrouded Header 35/2502/0016
Q1 Transistor RF Power MRF650 27/3020/MRF650
Q2 Transistor RF Power MRF650 27/3020/MRF650
Q3 Transistor NPN 2N3904 T0-92 27/2020/3904
Q4 Transistor PNP 2N3906 T0-92 27/2010/3906
Q5 Transistor NPN 2N3904 T0-92 27/2020/3904
R3 Resistor 10R 5% .25W Axial 51/1040/0010
R4 Resistor 10R 5% .25W Axial 51/1040/0010
R7 Resistor 10R 5% .25W Axial 51/1040/0010
R8 Resistor 10R 5% .25W Axial 51/1040/0010
R9 Resistor 100 Ohm Non Inductive 51/RF40/0100
R10 Resistor 100 Ohm Non Inductive 51/RF40/0100
R11 Resistor 220R 5% .25W SM1206 51/3380/0220
R12 Resistor 220R 5% .25W SM1206 51/3380/0220
R13 Resistor 220R 5% .25W SM1206 51/3380/0220
R14 Resistor 220R 5% .25W SM1206 51/3380/0220
R15 Resistor 47K 5% .25 Axial 51/1040/047K
R16 Resistor 100K 5% .25W Axial 51/1040/100K
R17 Resistor 1K 5% .25W Axial 51/1040/01K0
R18 Resistor 47K 5% .25 Axial 51/1040/047K
R19 Resistor 100K 5% .25W Axial 51/1040/100K
R20 Resistor 1K 5% .25W Axial 51/1040/01K0
R21 Resistor 100R 5% .25W Axial 51/1040/0100
R22 Resistor 33K 5% .25W Axial 51/1040/033K
R23 Resistor 47K 5% .25W Axial 51/1040/047K
R24 Resistor 10K 5% .25W Axial 51/1040/010K
R25 Resistor M1 5% .25W Axial 51/1040/01M0
R26 Resistor 100K 5% .25W Axial 51/1040/100K
R27 Resistor 0R1 WW 10W 51/0010/00R1
R28 Resistor 0R1 WW 10W 51/0010/00R1
R29 Resistor 10K 5% .25W Axial 51/1040/010K
R30 Resistor 10K 5% .25W Axial 51/1040/010K
R31 Resistor 10K 5% .25W Axial 51/1040/010K

PA220 PARTS LIST
RF Technology PA220 Page 19
Ref Description Part Number
R32 Resistor 270R 5% .25W Axial 51/1040/0270
R33 Resistor 270R 5% .25W Axial 51/1040/0270
R34 Resistor 10K 5% .25W Axial 51/1040/010K
R35 Resistor 2K2 5% .25W Axial 51/1040/02K2
R36 Resistor 10K 5% .25W Axial 51/1040/010K
R37 Resistor 10K 5% .25W Axial 51/1040/010K
R38 Resistor 10K 5% .25W Axial 51/1040/010K
R39 Resistor 680R 5% .25W Axial 51/1040/0680
R40 Resistoe 33K 5% .25W Axial 51/1040/033K
R41(P2) Resistor 100R 5% .25W Axial 51/1040/0100
RT1 Thermistor 54/0400/0080
RV1 10K Trimpot 53/1020/010K
RV2 10K Trimpot 53/1020/010K
U1 IC Quad Op-Amp TLC274 25/2050/274C
U2 IC Voltage Reg LM78L08 25/2040/78L08
Assembly 11/9106/0001
PCB PA LED 30/9106/0001
D1 Diode LED Green T1 3/4 21/1011/LEDG
D2 Diode LED Red T1 3/4 21/1011/LEDR
D3 Diode LED Yellow T1 3/4 21/1011/LEDY
Assembly 12/0004/0001
Connector 16 way IDC 35/2512/0016
Cable 16 way 26GA .05ID 36/1000/0016
Connector DB9F IDC 35/5020/009F
Connector DB25M Solder 35/5020/024M
Spacer M3 x 10 73/M3SP/H010
Screw M3 x 6 CSK PD BZNK 70/M315/0006
Nut M3 Steel BZNK 72/M315/0001
Washer M3 Shakeproof Steel BZNK 71/M325/0001
Screw M3 x 6 TT PNHD BZNK 70/M355/0006
Screw M3 x 10 TT PNHD PD BZNK 70/M355/0010
Spacer A1 5D x 3L M3 Clear 73/M3SP/0003
Assembly 12/0005/0075
Connector N Type Flange Mount 35/50NA/0001
Cable Coax RG316 35/0030/0316
Assembly 12/0006/0320
Connector BNC Crimp 35/50BA/0001
Cable Coax 36/0030/0316
Assembly 12/0007/R370
Wire 50 x .25 T/C PVC Red 36/50X2/RED
QC 6.35 F Crimp 35/1635/0001
Assembly 12/0007/B340
Wire 50 x .25 T/C PVC Black 36/50X2/BLK
QC 6.35 F Crimp 35/1635/0001
Bottom, Power Amp 80/9127/0001
Top, Power Amp 80/9126/0001
Rear Panel, Power Amp 80/9125/0001
Front sub Panel, Power Amp 80/9128/0001
Front Panel, Power Amp 80/9129/0001
Heat Sink, Power Amp 80/9130/0001
Cover Plain Module 80/9101/0001
Pawl Latch, DIUS DP109SAC 76/0001/0001
Handle 3.0 76/0002/300B
Handle Ferrule .156Blk 76/003/156B

T220 PARTS LIST
Page 20 RF Technology PA220
Ref Description Part Number
Screw 4-40 x 6 CSK PD BZNK 70/4415/0006
Label, PA Front Panel 81/9105/0001
Label, S/W and SMA 81/9100/PA220
Gnd Lug M3 Utilux H254 39/M301/H254

1 2 3 4 5 6 7 8
A
B
C
D
87654321
D
C
B
A
FWD.PWR.
REV.PWR.
IC A
FWD.PWR.
REV.PWR.
IC A
IC B
RF DET.
OVER TEMP.
+8.0
+8.0
+13.2A
+13.2B
+13.8 +13.2A
+13.2B
+13.8
+8.0
+8.0
+8.0
+13.8
+13.8
RF DET.
RF LED
RF LED
TEMP. LED
TEMP. LED
DC LED
IC B
OVER TEMP.
LOW PASS FILTER
COMBINER
DIRECTIONAL COUPLER
SPLITTER
INPUT
OUTPUT
25W MAX.
L2
L3
R3 10
C9
220P
C11
220P
C12
91P L4 C13
1N0 +
C14
6U8
L5
L7
L8
R7
10
C23
220P
C25
220P
C26
91P
L9 C27
1N0 +C28
6U8
L10
CX1
CX2
CX3
CX4
L11
1U
R11
220
R12
220
R13
220
R14
220
C29
10pF
C30
10pF
D2
BAT17
C31
100P
C32
100P
C33
27P
R16
100K
R17
1K
C35
27P
R19
100K
R20
1K
R21
100
C36
10N
C37
27P
R25
1M
C39
12pF
L12
C40
27pF
L13
C41
27pF
L14
C42
12pF R26
100K
J2 N type Fem
TP1
TP2
+
C46
10U
VI
1
GND
2
VO 3
U2
LM78L08
C47
27P
R31
10K
t
RT1 C50
27P
D5
1N4148
Q4
2N3906
Q5
2N3904
R34
10K
R35
2K2
R36
10K
R37
10K
C51
10N
C52
1N0
C53
100N
C54
100N
C55
1N0
C44
1N0
C43
1N0
C45
100N
C48
27P
J1
BNC
Q3
2N3904
R4
10
R8
10
R9
100
R10
100
R28
0R1
R27
0R1
TP3
R38
10K
C34
1nF
P1
P2
P3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
P4
R32
270
R33
270
R39
680
C4
56pF
C5
56pF
C10
18pF
C6
56pF C7
47pF
C24
18pF
C18
56pF
C19
56pF
C20
56pF
C21
47pF
R29
10K
RV2
10K TRIMPOT
R30
10K
C49
27P
RV1
10K TRIMPOT
R24
10K
R23
47K
L1 1U0
L6 1U0
C57
220pF
C58a
18P
C59a
18P
Q2
MRF650
Q1
MRF650
D1
BAT17
R40
33K
R22
33K
5
6
7
0 0
+
-
U1B
TLC274
2
3
1
411
-
+
U1A
TLC274
12
13
14
00
+
-
U1D
TLC274
10
9
8
0 0
+
-
U1C
TLC274
C22
27pF
C8
27pF
C38
100N
C15
1N0
C1
1N0
R15
47K
R18
47K
R41
100
C60
18pF
C58
47pF
C61
18pF
C112
100pF
C102
100pF
C59
47pF
1 2
100W Power Amplifier - 220MHz ( modified from PA350 )
05/9105 R7
24-Oct-2003 16:01:32
\\Goanna\master\CAD_File\Protel99\220MHz\220MHz.ddb - PA220-Rev3.sch
Title
Size: Number:
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Sheet of
A3 RF Technology Pty Ltd
Unit 10, 8 Leighton Place
Hornsby, NSW 2077
AustraliaRev. Release Date: Originator:
Rev No. ECO No. Description of Change
GM
2
2 140 Coarse tuning adjustment
3 N/A (Fixing Ref. Des. Errors) C59->C59a, C58->C58a, C113->C59, C103->C58, C104->C60, C114->C61
L12, 13 and 14 are RFT part # 37/2635/1502
combiner / splitter are RFT part # 12/0021/0235
L2, 3, 7 and 8 are RFT part # 37/2021/0007