RF Technology Eclipse PA220 User manual

Eclipse Series
RF Technology
[email protected]
November, 2001
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

CONTENTS CONTENTS
Contents
1 Operating 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
2 Circuit 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
3 Field Alignment Procedures 8
3.1 Output Power Level 8
3.2 Tuning Procedure 9
4 Specifications 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
A Engineering Diagrams 12
A.1 Block Diagram 12
A.2 Circuit Diagrams 12
A.3 Component Overlay Diagrams 12
B Parts List 17
B.1 PA220 (05/9105/0220) 17

Page 4 RF Technology PA220
1 OPERATING INSTRUCTIONS
1 Operating 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 T500, join pin 8 on the exciter and the amplifier.
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.

RF Technology PA220 Page 5
1 OPERATING INSTRUCTIONS 13. Internal Adjustments
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.
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.

Page 6 RF Technology PA220
2 CIRCUIT DESCRIPTION
Pins Function
1, 2, 14, 15 Positive supply
12, 13, 24, 25 Ground (negative supply)
8 ALC 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.
2 Circuit Description
The following descriptions should be read as an aid to understanding the block and
schematic diagrams shown in figures 1 - 4.
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 impedances of the
transistors is matched to 50Ωby broad band microstrip 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.
___
_________________
1Excessive 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
2 CIRCUIT DESCRIPTION 2.2 Power Splitter/Combiners
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 70Ωtransmission lines
and 100ΩRF 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.
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

Page 8 RF Technology PA220
2.6 RF Output Indicator 3 FIELD ALIGNMENT PROCEDURE
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 Celcius 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.
3 Field 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.
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.

RF Technology PA220 Page 9
4SPECIFICATIONS 3.2 Tuning Procedure
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.
4 Specifications
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.
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.

Page 10 RF Technology PA220
4.2 Physical Configuration 4 SPECIFICATIONS
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 0.1Ω, ±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
4.4.2 Frequency Range
Model Frequency Range
PA220 215-240MHz

RF Technology PA220 Page 11
4 SPECIFICATIONS 4.5 Antenna Impedance
4.5 Antenna Impedance
Nominal load impedance is 50ΩSWR 1.5:1 or better. The PA350/500 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 1uW 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 T500. 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.
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.

Page 12 RF Technology PA220
A ENGINEERING DIAGRAMS
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.

RF Technology PA220 Page 13
A ENGINEERING DIAGRAMS A.1 wiring and block diagrams
Figure 1: The block circuit diagram of the PA220 Amplifier

Page 14 RF Technology PA220
A.1 Wiring and block Diagrams A ENGINEERING DIAGRAMS
Figure 2: The chassis wiring diagram of the PA220 Amplifier.

RF Technology PA220 Page 15
A ENGINEERING DIAGRAMS A.2 Circuit Diagrams
Figure 4: The component circuit diagram of the power amplifier.

Page 16 RF Technology PA220
A ENGINEERING DIAGRAMS A.3 Component Overlay Diagrams
Figure 5: The component overlay diagram of the PA220 amplifier.

RF Technology PA220 Page 17
B PARTS LIST
B Parts List
B.1 PA220 (05/9105/0220)
Designator Part Type Part #
Start PCB assembly
C1 Cap 1N0 5% 63V NPO SM1206 46/3300/01N0
C10 Cap trim 2-18pF Hi temp 49/3001/018P
C11 Cap 220pF 20% 100V SM1008 46/3100/220P
C12 Cap 91pF 5% 250V Mica 48/3002/091P
C13 Cap 1N0 5% 63V NPO SM1206 46/3300/01N0
C14 Cap 6.8uF 20% 25V 41/2225/06U8
C15 Cap 1N0 5% 63V NPO SM1206 46/3300/01N0
C100 Cap 10pF 5% 250V Mica 48/3002/010P
C110 Cap 10pF 5% 250V Mica 48/3002/010P
C112 Cap trim 6-100pFHi temp 49/3003/100P
C19 Cap 56pF 5% 250V Mica 48/3002/056P
C8 Cap 10pF 5% 250V Mica 48/3002/010P
C20 Cap 56pF 5% 250V Mica 48/3002/056P
C21 Cap 47pF 5% 250V Mica 48/3002/047P
C114 Cap trim 6-100pFHi temp 49/3003/100P
C23 Cap 220pF 20% 100V SM1008 46/3100/220P
C24 Cap trim 2-18pF Hi temp 49/3001/018P
C25 Cap 220pF 20% 100V SM1008 46/3100/220P
C26 Cap 91pF 5% 250V Mica 48/3002/091P
C27 Cap 1N0 5% 63V NPO SM1206 46/3300/01N0
C28 Cap 6.8uF 20% 25V 41/2225/06U8
C29 Cap 10pF 5% 63V NPO SM1206 46/3300/010P
C22 Cap 10pF 5% 250V Mica 48/3002/010P
C30 Cap 10pF 5% 63V NPO SM1206 46/3300/010P
C31 Cap 100pF 5% 63V NPO SM1206 46/3300/100P
C32 Cap 100pF 5% 63V NPO SM1206 46/3300/100P
C33 Cap 27pF 2% 100V NPO Rad 45/2680/027P
C34 Cap 1N0 5% 63V NPO SM1206 46/3300/01N0
C35 Cap 27pF 2% 100V NPO Rad 45/2680/027P
C36 Cap 10nF 10% 50V X7R Rad 46/2001/010P
C37 Cap 27pF 2% 100V NPO Rad 45/2680/027P
C38 Cap 100nF 5% 50V MKT Rad 47/2007/100N
C39 Capacitor Soshin 12pF Mica SM1210 48/3003/012P
C102 Cap trim 6-100pFHi temp 49/3003/100P
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 Cap 1N0 5% 63V NPO SM1206 46/3300/01N0
C44 Cap 1N0 5% 63V NPO SM1206 46/3300/01N0
C45 Cap 100nF 10% 50V X7R Rad 46/2001/100N
C46 Cap 10uF 35V Electro Rad 41/2001/010U
C47 Cap 27pF 2% 100V NPO Rad 45/2680/027P
C48 Cap 27pF 2% 100V NPO Rad 45/2680/027P
C49 Cap 27pF 2% 100V NPO Rad 45/2680/027P
C5 Cap 56pF 5% 250V Mica 48/3002/056P
C50 Cap 27pF 2% 100V NPO Rad 45/2680/027P
C51 Cap 10nF 10% 50V X7R Rad 46/2001/010P

Page 18 RF Technology PA220
C52 Cap 1N0 5% 63V NPO SM1206 46/3300/01N0
C53 Cap 100N 10% 63V X7R SM1206 46/3310/100N
C54 Cap 100N 10% 63V X7R SM1206 46/3310/100N
C4 Cap 1N0 5% 63V NPO SM1206 46/3300/01N0
C56 Cap 56pF 5% 250V Mica 48/3002/056P
C57 Cap 220pF 20% 100V SM1008 46/3100/220P
C58 Cap trim 2-18pF Hi temp 49/3001/018P
C59 Cap trim 2-18pF Hi temp 49/3001/018P
C6 Cap 56pF 5% 250V Mica 48/3002/056P
C18 Cap 56pF 5% 250V Mica 48/3002/056P
C101 Cap 47pF 5% 250V Mica 48/3002/047P
C103 Cap 47pF 5% 250V Mica 48/3002/047P
C111 Cap 47pF 5% 250V Mica 48/3002/047P
C113 Cap 47pF 5% 250V Mica 48/3002/047P
C7 Cap 47pF 5% 250V Mica 48/3002/047P
C104 Cap trim 6-100pFHi temp 49/3003/100P
C9 Cap 220pF 20% 100V SM1008 46/3100/220P
CX1 70 OHM SR COAX 12/0021/0105
CX2 70 OHM SR COAX 12/0021/0105
CX3 70 OHM SR COAX 12/0021/0105
CX4 70 OHM SR COAX 12/0021/0105
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
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
L2 COILCRAFT 132-7 37/2021/0007
L3 COILCRAFT 132-7 37/2021/0007
L4 FERRITE BEAD 37/1022/0001
L5 6 HOLE CHOKE 37/1021/0001
L6 Inductor 1uH Axial 37/2021/001U
L7 COILCRAFT 132-7 37/2021/0007
L8 COILCRAFT 132-7 37/2021/0007
L9 FERRITE BEAD 37/1022/0001
P1 6.35 QC TAB 35/0635/0001
P2 2.8 QC TAB 35/0028/0001
P3 6.35 QC TAB 35/0635/0001
P4 16 WAY SHROUDED DEADER 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 27/2020/3906
Q5 Transistor NPN 2N3904 T0-92 27/2020/3904
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% .25W 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% .25W 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

RF Technology PA220 Page 19
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 1M 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
R3 Resistor 10R 5% .25W Axial 51/1040/0010
R30 Resistor 10K 5% .25W Axial 51/1040/010K
R31 Resistor 10K 5% .25W Axial 51/1040/010K
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
R4 Resistor 10R 5% .25W Axial 51/1040/0010
R40 Resistor 33K 5% .25W Axial 51/1040/033K
R41 Resistor 100R 5% .25W Axial 51/1040/0100
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
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
End PCB assembly
Start 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
End of assembly
Start assembly 12/0004/0001
Connector 16 way IDC 35/2512/0016
Cable 16 way 26GA .05 ID 36/1000/0016
Connector DB9F IDC 35/5020/009F
End of assembly
Connector DB25M solder 35/5020/025M
Spacer M3x10 73/M3SP/H010
Screw M3x6 CSK PD BZNK 70/M315/0006
Nut M3 Steel BZNK 72/M315/0001
Washer M3 Shakeproof Steel BZNK 71/M325/0001
Screw M3x6 TT PNHD PD BZNK 70/M355/0006
Screw M3x10 TT PNHD PD BZNK 70/M355/0010
Spacer Al 5Dx3L M3 Clear 73/M3SP/0003
Start assembly 12/0005/0075
Connector N type flange mount 35/50NA/0001
Cable coax RG316 35/0030/0316
End of assembly

Page 20 RF Technology PA220
Start assembly 12/0006/0320
Connector BNC crimp 35/50BA/0001
Cable coax RG3216 36/0030/0316
End of assembly
Start assembly 12/0007/R370
Wire 50x.25 T/C PVC Red 36/50X2/RED
QC 6.35 F Crimp 35/1635/0001
End of assembly
Start assembly 12/0007/B340
Wire 50x.25 T/C PVC Black 36/50X2/BLK
QC 6.35 F Crimp 35/1635/0001
End of assembly
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 .156 blk 76/0003/156B
Screw 4-40x6 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