ATU-100 EXT Antenna Tuner for Ham Radio, GOOZEEZOO V3.2 1.8-55MHz Automatic Antenna Tuner by N7DDC 7x7,100W Open Source

great little tuner. Internal battery is a huge plus. So far, using it to tune a Wilson 1000 on 10, 11 and 12 meters. Tunes without issue. Price is an added bonus.

Our Athens State Amateur Radio Club now has two of these and find them perfect for QRP and 100 watts or less operating environments. Battery has greater than 8 hours life and we’ve had zero problems with the units. Not measuring any noticeable insertion loss or change in noise floor. Love the default auto tune mode and very rapid tuning cycle. Quality of the unit is exceptional. Highly recommended…

It works well but it has limitations. I was able to tun a 25' end fed wire through a 4:1 unun on 10-20 meters. However, it would not tune on 30 or 40m. It was the same on my Chameleon MPAS. It would tune 10-20 but nothing below 20. It seems the impedance mismatch on the lower bands is too much for this tuner to handle.

I am a HAM and 11-meter enthusiast. This unit was like chocolate Ganash on a really good cake. It works perfectly. I have a 102-steel whip, ball and heavy spring that is mostly resonate on my 3 rd. vehicle a 2006 Toyota Sienna. It is hole mounted on the roof (well it is and old vehicle, let the good times roll). Middle of 27.18500 mhz 1.9 swr to 28.5000 1.9 swr. Channel 40 cb 1.6 swr. I added the matcher and it runs between 1.0 swr and 1.2 swr. Made 3 contacts from Houston, Tx to New York state and Pennsylvania. Receiving radio operators thought I was on a base station and could not believe it was a mobile unit. Very happy and just hope it holds together. Case seems to be made of painted steel, and I would rate it as a prosumer piece of equipment. This model does not come with a direct power cord. Plan on plugging in the included Lithium battery trickle charger for the lithium battery that operates the unit. It is very phlegmatic. No bells, whistles or lights. Just works with a perfectly operational small but clear read out. Tested at 1 watt to 80 watts pep. The radio shop has never seen a mobile antenna matcher and wants one. Hope this helps. All the best and I will meet you on the air.

Works great. I just plugged it in. Great QRP tuner.

The “automatic” part of the tuner isn’t available with the battery version. There is no A/M button on back. The unit works, but it must be manually tuned by hitting tune button for each band.

This unit works great. I have 2 older Kenwood radios that had specific tuners made for them you can't buy anymore. O tried one of these units and it works great in my mobile rig. I plan to get another for my base set up. Great unit and good price.

Well first of all I'm amazed with this little tuner,but I found the glass fuse as no good and had to replace.I went on the internet to find replacment fuses and with that said the tuner came to life via external power source.