Portable Automatic Antenna Tuner ATU-100 | 100W 1.8-55MHz OLED Display | USB Charging Internal Battery

Works great with my FT 710. Only have a 24ft EFD antenna due to HOA. FT 710 ATU couldn’t tune that short antenna on 40 and 80 meters. The ATU -100 solved that issue. Good value.

Don't buy this product. I have read how it will burn out easy after I ordered it. So when it arrived it did not have very clear instructions. As a precaution, I took my radio and the new tuner to an authorized radio shop. He hooked it up and swr was 1.3 with the power output on radio set to 25 watts. Unit was in automatic mode and as soon as the mike was keyed, the display screen went blank. This is a true piece of junk, I'm serious, it will not work and you will have a box of junk for nothing. I would rate it myself as a -500

Very nice product that arrived in perfect condition. I am very pleased with my purchase!

This is an amazing value... I love that it gives me power output and SWR data on the screen, unlike my similar single button LDG autotuner that competes in this category (the LDG Z-100-Plus at 3X the price doesn't have an internal battery or display). Battery life seems good, but did self-drain enough after 6-9 months to not power on. Tunes up on only 5 watts (not tried less). Have run 80-90 SSB watts through it, no problem. Not tried CW/digital. Solid build and aluminum case. Like many budget/value items, it could be improved: - Wish it had 2-3 buttons (like some batteryless models) instead of one that needs a short/long press (easy to forget which press does what and would like a bypass button). - Would be nice to choose between BNC connectors or UHF connectors at purchase. - Wish it had a 12V jack on the back to bypass the battery when its dead or for extended home use. - It uses a dot and underline on the screen for indicators, which are easily overlooked and have no on-screen or on-case label for what they mean; would much prefer discrete LEDs in holes on the case (like LDG does). - Cosmetically, the factory didn't remove the plastic protective wrap on the screen (which I appreciate protected the screen), but with the edges tucked tightly under the bezel, it was difficult to fully remove that plastic (I needed tweezers). - You must use a USB-A to USB-C cord to charge it. Won't charge with USB-C to USB-C cables. (I have the same problem with my HT battery that has a USB-C port. I suspect these basic charging circuits don't fully implement the USB-C spec, and are only passing through the two power pins.) - No detailed manual included. (This is based on an open source design by N7DCC, so you can google "atu-100 manual" for manuals, schematics and firmware. It's possible to add those extra buttons if you want to DIY. You can also change parameters such as the autotune SWR threshold or calibrate the watts & swr display.) If most of those issues were fixed in a future revision, this would still be a good value even at a $10-20 higher price.

If I could give 1 star I would this is the second one after the first ones screen completely stopped working 10 min into this one and its so jumbled its useless to read do not recommend oh and you wont get a full refund i lost 10 bucks wasting my time with this

Reduces my SWR significantly. Have tested primarily on 40m band.

Has not worked well, in many instances this auto tuner added to the SWR seen at the transmitter instead of reducing it.

Stopped working

would like to see this in a 12 volt version. I tried a 1.8-50Mhz Automatic Antenna Tuner, 10-15VDC 100W HY100 HAM Antenna Tuner, and it didn't work at all. I sent that one back and got this version that worked right out of the box The sellers store says "You need to use 9‑12V to start the ATU‑100. If you use a power bank or computer USB port to output power, you cannot start the ATU‑100 because their voltage is too low " There is no place to power it from 12 as it has a usb cable. I think there may be a mistake in translation and it should read watts not volts. The internal battery was enough to start it. Excellent

Forgot this... @ seller : Item arrive like this, screen unfixed , but power on with display working but not doing the tuning antenna job@10W with the 50 ohm dummy load at required power and Hi SWR on radio , My internal radio powerAmplifier going under protection.... infinite swr, coaxial cable double checked No manual inside the box... @ amazon staff / IA whatever.... Have to return at post office losing my time, use my printer and 3 week payback on my credit card needed. .. Time is money , not working for free... Thanks amazon prime .... For a new try with amazon prime i can tell , I 'm not very happy of the evolution of the service. try to speak to someone by phone 4 times and system flush me.... the for the gift I will not give at Christmas's

Received, but have not used. Looks good

The unit arrived with loose non-functioning display. I opened the front panel up and was shocked by how the display was connected, and the connection points cracked during shipping. I hot glued the display and soldered the connection legs (don't have a name for it, see pic). Now it is working and fast to tune. But definitely won't rely on it for out door activities.

Had for several weeks, tunes my delta loop antenna very well. A very good value and performance.