100 W Solid-State Linear Power Amplifier
Copyright © 2010~2018, Xiegu Communications
XIEGU
XPA125B
Instruction Manual
V-1.00.0
XIEGU COMMUNICATIONS
Important reminder:
Safety considerations:
Do not use equipment during an electrical
storm.
Features:
-
-
Do not expose the unit to moisture.
100 Watts.
-
-
Auto tuning function.
Use this device responsibly and observe all
local laws and regulations.
Caution! High RF voltage at antenna
connector!
Packing list:
①
①
② ③ ⑤
④
2
Before operating the equipment please
study this instruction manual carefully, and
retain it for future reference.
RF power amplifier with inbuilt antenna
tuner (ATU).
Maximum RF output power of
Wide frequency range of 0.5 –
-
Harmonic suppression of 50 dB
-
The maximum output power is automatically
constant (currently, only for
X108G, X5105 ，G90，G1M，and XIEGU
follow-up models).
XPA125B.. .. .. .. .. .. .. .. .... .. .. ..1
②
Power supply cable................1
③
Date cable.............................. 1
④
Communication cable.............1
⑤
Service card.............................1
54 MHz.
Yaesu FT817，
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Maximum output power: 1.8 - 30MHz ≥100W
50 - 54MHz
≥80W
Maximum operating ambient temperature: 55℃
Spurious suppression:：≥ 50dB
Supply voltage: 12 - 15 V DC
Transmit: 30A
Tuning frequency range: 1.8 – 30 MHz/50 – 54 MHz
Maximum tuning range: 14 - 500Ω
1.3 Product specifications
Dimensions: 260 x 160 x 70 mm (not including control knobs, feet, handles, etc.)
Weight：3 Kg(host only)
3
1 XPA125B Specifications
1.1 Amplifier:
Frequency range: 1.8 – 54 MHz
Gain: 13dB (±1dB)
Current draw @ maximum output:
Standby: 700 mA
@Max
1.2 ATU:
@Max
：
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XPA125B will turn on.
160m→80m→60m→40m→30m→20m→17m→15m→12m→10m→6m
Used to switch the power amplifier into or out of circuit.
4
2 Equipment description
2.1 Front panel layout:
Power key
①
When XPA125B is turned on, press this button and hold for 2 seconds,
XPA125B will shut down.
When XPA125B is turned off, press this button and hold for 2 seconds,
② ATU
function key
Via this button you can access the automatic antenna tuning function.
③ BAND
selection key
Using this button you can select between manual band switching or
automatic band switching.
In manual band switching mode, the XPA125B will change bands in the
following order:
④ PA
key
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organic glass protective plate.
2.2 Rear panel layout:
Power supply socket:
The XPA125B requires a 12 - 15 V DC supply
○7
Connector:
The ANT socket is connected to the antenna, the connector model is SL16-K.
○
Holder:
Internal fuse holder. Fuse rating is DC 30A.
○9
○
The data interface connections are as follows:
5
⑤ LCD
All working status information is displayed here. The display is covered by an
DC IN
⑥
ANT
FUSE
8
Ground
10
ACC
socket:
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PIN2：PTT Signal input
PIN5
NC
○
Socket:
model is SL16-K.
○
interface:
This interface is for XPA125B firmware updates and connection to a PC.
2.3 Display interface layout:
⑴
Displays the SWR value of the XPA125B output.
6
PIN1：NC
PIN4： ALC input
：
PIN3：Band voltage input PIN6： GND
11 TRX
The TRX interface is connected to the transceiver output, the connector
12 CIV
Input SWR value:
Displays the SWR value of the XPA125B input.
⑵ Operating voltage:
Displays the value of DC voltage supply to the XPA125B.
⑶ Operating current value:
Displays the current being drawn by the XPA125B.
⑷ Output stage temperature:
Displays the current temperature of the PA stage.
⑸ Output SWR value:
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⑹
circuit.
Indicates that the power amplifier is operational.
⑺ Input power value:
Output power value:
Displays the output power being delivered by the XPA125B in Watts.
Automatic antenna tuner unit (ATU) status:
(10)
Displays the status of the automatic antenna tuner.
unit. (BYPS)
If tuning fails, The output standing wave value will flash.
7
Power amplifier status:
ON: The current signal is connected to the power amplifier unit.
OFF: Indicates that bypass mode is selected, the power amplifier is switched out of
RX
TX
Indicates that the unit is in receive mode.
Indicates that the unit is in the transmit mode.
Displays the power input value to the XPA125B in Watts.
⑻ Current working band status:
Displays the current working band, and whether automatic or manual mode
is selected.
The figure above shows the 6 meter band.
(9)
OFF: Indicates that the XPA125B is not connected to the automatic antenna tuner
ON: Indicates that the XPA125B is connected to the automatic antenna tuner unit.
(IN USE)
When tuning is successful, The output standing wave value will display stably.
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3. Operating instructions
3.1 Wiring connection method
the band switching and ALC functions of the amplifier.
-
XPA125B
TRX port.
-
the XPA125B because it does not have an ACC interface.
3.1.2 Method for connecting XPA125B with X5105
ON position.
8
3.1.1 Method for connecting XPA125B with X108G
The XPA125B can be directly connected to an X108G, which can then control
The ACC data cable supplied with the XPA125B is connected between
the ACC ports of the two units. Both connectors are the same so
either end of the cable can be connected to either socket.
Use suitable RF coaxial cable to connect the X108G ANT port to the
-
XPA125B ANT portshould beconnected to theantenna.
Note: The early version of the X108 cannot be directly connected to
Use the dedicated connector CE-19 to connect. Also, set the ALC switch on the CE-19 to the
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3.2V is applied to the PTT port of the XPA125B, the internal
is needed. XPA125B band control voltage information is as follows.
BAND
920
BAND
2070
----
----
1150
2300
----
----
3.2.1 Using the power amplifier unit [PA unit] (ATU unit is set to OFF)
-
-
The output power of
the connected transceiver.
-
9
3.1.3 Connection method between XPA125B and other QRP radio
If you want to start the XPA125B power amplifier and put it into the transmit
mode, you need to set the PTT port to a low level [level≤0.1V].
If the PTT output signal of the transceiver is at high level, the high level
needs to be converted into a low level, and then input to the XPA125B
[ACC-PTT] port.
Note: If a voltage of
≥
processor will be permanently damaged!
Pin 2 of the XPA125 ACC port is the PTT input port
In order to achieve automatic band switching, the corresponding band voltage
1.8 MHz
3.8 MHz
5.0 MHz
7.0 MHz
10.0 MHz
LEVEL(mV)
230
460
690
14.0 MHz
18.0 MHz
21.0 MHz
24.0 MHz
28.0 MHz
LEVEL(mV)
1380
1610
1840
BAND
50.0 MHz
----
----
LEVEL(mV)
2530
----
----
3.2 Procedure:
-
Press the PA key,so that the state of the amplifier is [ON].
If your connected transceiver is an X108G or X5105, please set
the output power to 5 W.
If you are using any other QRP transceiver, please set the output
power to 1 W.
Set your transceiver to CW mode, press the
transmit,
and the XPA125B amplifier will be activated
CW key to
.
The output power of the XPA125B can be adjusted by adjusting
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Warning:
3.2.2 Band switching
-
switch to
the desired frequency band.
160m→80m→60m→40m→30m→20m→17m→15m→12m→10m→6m
state).
-
Set the transceiver mode to CW& set the output power to 5 W.
-
-
ATU unit will start tuning;
-
-
If tuningfails, The output standing wave value will flash.
After successful tuning, switch the transceiver to the desired state for use.
10
1. Do not allow the maximum output power of the amplifier to exceed 100 W.
2. Using the XPA125B at high power levels for extended periods can lead to
overheating and potential damage to the PA stage.
You can switch between the two modes of [AUTO-MANUAL]
via this key.
-
If you want to connect the XPA125B to an X108G or X5105,
please set XPA125B to [AUTO] mode.
-
If you want to connect the XPA125B to other devices,
please set XPA125B to [MANUAL] mode and manually
Manual switching of frequency bands follows this order：
3.2.3 Using the automatic antenna tuner unit [ATU] (PA unit is set to OFF
Press the [ATU] buttonso that the current state of the amplifier
is [ON].
Press the CW key to transmit, Press and hold the ATU button, the
If tuning is successful, The output standing wave value
will be displayed stably.
If you need to re-tune, you can press the [ATU] button for two seconds to
force the XPA125B ATU unit to start re-tuning.
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3.2.4 Combined use of power amplifier + automatic antenna tuner
-
[ON].
-
-
Set the transceiver mode to CW, the output power to 5 W, and
press the CW key, switching on transmitting for 2 seconds..
and display this information on the screen.
-
will then be connected directly to the antenna.
3.2.6 Protection and warning
to the receiving state.
11
-
Over temperature：≥100℃
Press the [PA] button so the current state of the PA unit displays
[ON].
-
Press the [ATU] button so the current state of the ATU
If the current SWR value is more than 3.0, the ATU unit will start
unit displays
Tuning automatically. At this time
If the current SWR value is less than 3.0, the ATU unit will start
Tuning automatically,and the PA unit will be activated.
-
If the current SWR value is more than 3.0, and automatic tuning
, the XPA125B will automatically switch to bypass mode
fails
3.2.5 Flexible configuration of PA unit and ATU unit
The ATU unit and PA unit of XPA125B can be used independently of each other.
You can therefore use the XPA125B as either an automatic antenna tuner or a
separate power amplifier. You can also bypass both units, and your transceiver
The XPA125B incorporates a variety of intelligent protection functions to ensure
as far as possible the safety of the equipment in daily use. When the XPA125B
enters an abnormal state, it will immediately enter protection mode and switch
to bypass mode.
the PA unit will be disabled.
Release the PTT button. Protection will be disabled and the XPA125B will return
When high SWR, high current, high voltage, over temperature and other
error states are detected, the XPA125B’s internal sensors will trigger the
protection function beyond a certain threshold. The threshold of each
sensor is as follows:
- High SWR：≥3.0
-
High current：≥25A
-
High voltage：≥15V DC
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Warning
12
When the XPA125B current d r aw is too high (more than 25A), o r a
short circuit occurs, the fuse on the rear panel may blow. The unit will
then no longer turn on. Please check the status of the fuse if this occurs.
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After-sales service policy
1. Warranty:
2. Warranty limitations:
E. Product’s serial number is missing, torn or blurred so we cannot determine if
13
This product has a one-year warranty effective from the date of purchase.
This warranty covers only manufacturing- and parts defects. It does not
cover damage caused by lightning, excess voltage on the power supply,
accidental damage or purposeful damage or misuse.
If the product needs warranty repair within two weeks of receiving the
product, XieGu will pay for the shipping both ways. After two weeks XieGu
will pay only for return shipping.
If the product is not covered under warranty, the customer pays for shipping
both ways plus the cost of the repair.
Any of the following will void the warranty applicable to the product and its
accessories:
A. Modification-, removal-, or maintenance of the internal circuitry,
without permission and authorization;
B. Unauthorized change of product’s embedded software;
C. Immersion in liquid or signs of external damage;
D. Warranty period expired;
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the radio is under warranty;
F.Product was not bought from XieGu or authorized distributor of XieGu.
B. Damage caused by an accident
E. Damage to the shell or other external components due to improper use.
Contact us: customer@cqxiegu.com
14
*None of the following conditions, are covered by the warranty:
A. Damage caused by improper use by the user；
；
C. Damage due to incorrect testing, maintenance, debugging, or other changes；
D. Damage is not caused by the material or the quality of production；
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