Xiegu XPA125B
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| Frequency | 1.8-54 MHz (HF + 6 m) |
| Bands | 160m, 80m, 40m, 30m, 20m, 17m, 15m, 12m, 10m, 6m |
| TX power | 100 W (100 W output on 1.8-30 MHz (>=80 W on 6 m) from a QRP radio's drive. ~13 dB gain. Built-in automatic antenna tuner. Solid-state) |
| Modes | SSB, CW, FM, AM, Digital |
| Weight | 2.66 kg (5.9 lb) |
| Year | 2018 |
| rf in | SO-239 (from QRP radio) |
| rf out | SO-239 (via built-in ATU) |
| alc | ALC + band-data to Xiegu radios |
| power req | 12-15 V DC (~30 A at full output) |
A clever, affordable QRP accessory: it turns a 5-to-10-watt radio into a 100-watt station and throws in an automatic antenna tuner, all in one compact, DC-powered box with a clear display. For a portable or QRP operator who wants the option of 100 watts and easy antenna matching, it is excellent value.
It outputs 100 watts - this is a barefoot-equivalent booster, not a high-power linear - and it needs a hefty 30-amp 12-volt supply at full output, which matters in the field. It is matched to low-power radios specifically, and like any solid-state amp its tuner and finals rely on protection for awkward loads. The 6-meter output is slightly lower at 80 watts.
The standard QRP-to-100-W companion: a 100-watt boost plus a built-in automatic tuner for the price of a good accessory. For an operator running a Xiegu or Icom QRP radio who wants the flexibility of 100 watts and easy matching, the XPA125B is a sensible, popular choice. It is a booster, not a legal-limit amplifier.
The Xiegu XPA125B is a clever little companion amplifier built for the QRP operator. Its job is to take the 5 to 10 watts of a low-power radio and boost it to a full 100 watts (slightly less, 80 watts, on 6 meters) - roughly 13 dB of gain - so that a tiny portable rig can put out the same power as a standard base transceiver when conditions call for it. On top of that it includes a built-in automatic antenna tuner that matches 14-to-500-ohm loads across the HF bands and 6 meters, plus a large, bright display showing the amplifier's status.
It is designed to pair with Xiegu's own QRP radios - the X5105, X6100, G1M, G90 and G106 - and with the popular Icom IC-705, running from a 12-to-15-volt DC supply, which makes it a natural fit for portable and mobile stations. The combination of a 100-watt boost and an automatic tuner in one affordable box is genuinely useful: it lets a featherweight radio reach a normal antenna and a normal power level without carrying a separate amplifier and tuner.
Its limits follow from its purpose. This is a booster to 100 watts, not a high-power linear, and at full output it draws around 30 amps from its 12-volt supply - a real consideration for battery operation in the field. It is matched specifically to low-power radios, and, like any solid-state amplifier, leans on its protection circuitry for awkward antenna loads. For a QRP operator who wants the flexibility of 100 watts plus easy matching, it is excellent value.