Xiegu X6100 Review: A Fun QRP SDR With Rough Edges

Everything is in the box. Battery, antenna tuner, sound card, microphone, a bright color screen with a waterfall, 160 through 6 m. Clip a wire to the back, press tune, and you are calling CQ from a picnic table. That convenience at this price is what the Xiegu X6100 sells, and it is genuinely fun to operate.

The catch is everything around it. Internal birdies, a front end that overloads near broadcast stations, a battery that lasts two or three hours, heat, and a quality-control record that makes me nervous about recommending it without conditions. Street price is around $500 to $600.

If you go in with realistic expectations and buy from a dealer who will take it back, it is a capable portable rig. If you want an appliance that just works for years, spend more.

What you get

The X6100 is an SDR built on a small Linux computer, with a 4-inch 800x400 display showing a panadapter and waterfall at 50 or 100 kHz span. It runs 5 W on the internal battery and 10 W from an external 12 to 13.8 V supply. Modes are SSB, CW, AM, FM and digital through the internal sound card over USB-C. There is Wi-Fi and Bluetooth, a multifunction hand mic, and a built-in mic and PTT on the radio itself.

The chassis is solid metal and feels well made. The flip-up legs are the weak part: they feel flimsy for what they hold up.

The tuner is excellent

The internal antenna tuner is the best feature on the radio. It matches almost anything I clip to it: end-fed wires, random lengths, verticals and portable whips. For POTA and SOTA, where antenna choice changes with every site, that removes a whole box and a coax jumper from the kit.

The screen and controls

The display is bright and sharp, and readable in sunlight, which matters more than anything on a portable rig. The waterfall is useful for spotting activity, though next to an IC-705's it looks less detailed. The layout can look busy at first. I find it informative.

Common functions live on physical buttons, not a touchscreen. That makes it easier to run mobile or with cold hands. Some settings, like keyer speed, are buried deeper than they should be.

Firmware decides everything

Early X6100s were flaky: slow or failed boots, frozen interfaces, odd transmit behavior. Firmware updates fixed a great deal of that, and the alternative R1CBU firmware goes further, with a much better CW decoder and FT8 running from the radio itself. The difference between an old-firmware unit and a current one is large.

So the first job with a new X6100 is a firmware update from microSD. Do it before you form an opinion. Operators disagree on how finished the radio is even on the latest firmware. My view: it is good enough to use and enjoy, not good enough to stop watching for updates.

Receiver: birdies and overload

Here is the honest weak point. The X6100 generates its own birdies and spurs across the bands, worst on 10 m. You can see them on the waterfall with no antenna connected. The attenuator and RF gain lower them, along with everything else.

The front end also overloads in strong RF. Near a high-power AM broadcast station the noise floor can rise to S9 on every band. Close to another station running 100 W, such as a busy Field Day site, the receiver can be damaged, not just swamped. I keep it well away from other transmitters and would add a broadcast-band filter in a city.

In a quiet park far from broadcast towers, which is where most POTA happens, the receiver is perfectly usable. CW with a narrow filter pulls up weak signals, and the noise reduction works well.

Battery and heat

The internal battery lasts about two to three hours, even mostly receiving. The radio draws a lot of current for a QRP rig, and battery charging and management are not great. For a short activation that is fine. For a full afternoon, bring an external battery, which also gets you 10 W.

It runs warm. On SSB and CW that is not a problem. On FT8 or long transmissions it gets hot, and the battery sits close to the heat. I put a small DC fan behind it for digital modes, and recommend you do the same.

Digital modes

Digital is a strength. One USB-C cable carries audio and CAT to a laptop, and WSJT-X is running within minutes. With R1CBU firmware you can even run FT8 on the radio itself, no computer needed, which is a real advantage for a POTA activation in poor conditions.

Where it fits in a portable kit

For park and summit activations the X6100 makes a very short packing list: the radio, a wire antenna, a key or the hand mic, and a spare battery. No tuner box, no separate sound card interface, no laptop if you run FT8 from the radio. That is the whole appeal, and on a good day it delivers. A steady run of contacts at 5 W from a park bench is entirely possible with a decent wire.

The built-in microphone and PTT on the radio body are a nice touch for a quick call, and the multifunction hand mic puts frequency and memory controls in your palm. I run 5 W most of the time anyway, so the internal battery limit matters less than its runtime.

Living with it past the first year

Kept on current firmware, a good X6100 settles into a dependable field radio for CW, digital and POTA. The worry is hardware: finals and front ends have failed after months, out of warranty, with little help from the factory. Xiegu has since released the X6200, which is worth a look before you commit. If you buy an X6100 now, treat the dealer warranty as part of the price.

Reliability and support

This is the part I would not skip. A meaningful share of X6100s have problems: units that will not boot, a dead screen, no RF output, failed finals, a receiver front end damaged by nearby RF. Some appear on arrival, some months later. Factory support is thin, parts are hard to find in some countries and schematics are not published.

That changes how you should buy it. Buy from a dealer close to home who will handle a return and offers a real warranty, not from a distant seller. Test every band, every mode and full power into a dummy load in the first days. If something is wrong, send it back while you can. Operators split on this radio largely along the lines of whose unit was good.

How it compares

Setting one up the way I do

1. Update to the latest Xiegu firmware, or install R1CBU firmware, from microSD before anything else.
2. Test every band and mode, and full power into a dummy load, during the return window.
3. Carry an external 12 V battery for longer sessions and 10 W.
4. Put a small DC fan behind it for FT8 and long transmissions.
5. Use ATT and RF gain to tame birdies and AM broadcast overload.
6. Keep it well away from other transmitters at Field Day.
7. Let the internal tuner handle random wires; carry a short coax jumper anyway.

Who should buy it

• POTA and SOTA operators on a budget who operate in quiet places.
• Portable digital-mode operators who want a sound card built in.
• Tinkerers who enjoy a hackable Linux SDR and alternative firmware.

Skip it if you live near a strong AM broadcast station, if you operate at busy multi-station sites, or if you need long battery life and dependable factory support. For a radio you never want to think about, the IC-705 or a KX2 costs more for good reason.

Bottom line

The X6100 is a fun, feature-packed portable SDR with an excellent tuner, a bright screen and easy digital modes at a bargain price. Birdies, overload, short battery life and spotty quality control keep it from being an easy recommendation, so buy it from a nearby dealer, update the firmware and test it hard early.