ATU-100 Cheap Automatic Antenna Tuner: Is it Any Good?

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The Open Source ATU-100 is available as both fully assembled and in kit form. Are these things any good and how do you get a good one?
PU1OWL ATU-100 Improvement Video: • Improving your ATU100
The following links are affiliate links. I get a small commission if you purchase using these links but does not impact the amount you pay.
ATU-100 Kit: amzn.to/3ZKXqjV
ATU-100 Case: amzn.to/3xWK3B4
Improved Diodes: amzn.to/3xVF2ZH

Опубликовано:

27 фев 2023

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Комментарии : 45

@patricks792 Год назад

Hey Brother! Just happened to run across this video. Great Job! But I'm not surprised. Continuing that great work ethic you always had. Thanks for the info. I look forward to viewing some of your other videos. Things are busy on my end right now but I need to knock the dust off some of my equipment and get back on the air. Don't be surprised if I reach out so I can tap into some of that extensive knowledge you have. Until then.......73's!

@houseofhamradio Год назад

Thanks Paddy! Yes would love to have a QSO with you.

@madcarew5168 Год назад

Works for me..built for qrp 10w max..adjusted chip with picket and info from btdigg.

@houseofhamradio Год назад

I had heard that you can make it QRP. Thanks for sharing. I think that re-flashing PIC is outside of what most would want to do.

@jackK5FIT Год назад

I too recently bought a new FT-891 to do portable with then I found a great deal on a used FT-857. I bought an AT-100 already assembled from Amazon. It's the model with no internal battery thus requiring an external power source, which wasn't a problem, tune button and auto and bypass buttons. There were good reviews on this model and it's worked very well for me on 3 outings so far. I went so far as to buy another one for the FT-857 and it's worked fine in testing so far. I was, and still am, concerned about quality control on these units. I removed the cases and looked over the solder points and made sure everything looked ok and nothing was loose. I am keeping my fingers crossed. Thanks for the review. If they both go down I will probably go with an LDG next. Jack K5FIT

@houseofhamradio Год назад

Poor solder joints seem to be the biggest issue with these. if they are both good, I would say you should be fine. I may still opt for an LDG but not for now.

@jackK5FIT Год назад

@@houseofhamradio I agree. Nothing jumped out at me when I looked so I am hoping for the best.

@johnnorth9355 7 месяцев назад

I use one (pre built) on my CB rig. Seems well matched 🙂.

@houseofhamradio 7 месяцев назад

Nice. Certainly within the frequency coverage of the device.

@kchaney56 2 месяца назад

So glad I watched this. Would love one of these but I am a newbie and after seeing the kit I know I could not build it.

@houseofhamradio 2 месяца назад

Glad it helped you. I wouldn’t recommend this to someone that is new to ham radio. Either get a radio with a tuner in it like the Yeasu FT-710 or consider an LDG auto tuner or maybe even a manual tuner which will give you the most tuning range but takes more time and effort to tune. Best of luck.

@ShaneKI5GBU 7 месяцев назад

Thanks for the video.

@houseofhamradio 7 месяцев назад

you bet

@wiggygpz 8 месяцев назад

I use a simler atu it works very well

@houseofhamradio 8 месяцев назад

It is actually a great design. There are some quality control issues with many of the pre-built models and even some of the kits.

@knightrider9795 Год назад

is it possible to use these units as SWR meter/power meter without tuning? I just want to check the output of my radio without tuning the antenna, like a standalone SWR meter/power meter.

@houseofhamradio Год назад

It will read power and SWR in bypass. If you are only planning on using for a meter, I would buy a dedicated meter as the readings on this are OK but not up to what a dedicated meter would give you.

@davidpatrick1813 6 месяцев назад

thanks

@houseofhamradio 6 месяцев назад

You're welcome!

@muppetpaster 9 месяцев назад

I did replace not only the diodes...also the caps....

@houseofhamradio 9 месяцев назад

How did that work out? Worth the effort? Noticeable difference? I have yet to do the mod to mine but intend to.

@n0vty873 Год назад

I got one with a pre assembled board, would not even power up. After some testing found the whole thing was fried. maybe salvage some parts off of it

@houseofhamradio Год назад

Thats unfortunate. Normally, it is just poor soldering. If it was a bad processor, I guess that could happen on a kit as well.

@Tocsin-Bang Год назад

I bought a ready-build and it was a heap of junk. I built one myself and it worked from switch-on. I only run 50W max and it seems fine. It tunes my main antenna from 80metres to 10 (10 being worst at 2:1).

@houseofhamradio Год назад

That seems to be a repeated theme which is why I recommend building it yourself. I would open up the built one and check solder connections. If you are lucky that may be all that is wrong with it although a lot of the pre-builts have a lot of substandard components so it could actually be a bad part.

@Tocsin-Bang 6 дней назад

@@houseofhamradio I did exactly as you suggested, there were bad joints, and a couple of bad components. I built the kit and fitted into the original case. Still working a year later. Mine doesn't have the extra buttons or the battery, but it tunes with as low as a couple of watts. I now mainly use it for my 4W QRP station.

@mattbw-G5MAT 2 месяца назад

The metal case they deliver them with is not a good choice. Mine works well but tunes better in a plastic case and with care taken to the cables inside and where you route them. I also modded my firmware so it tunes from 1w not 11 or 12 when I got it. I plan to replace the diodes too.

@houseofhamradio 2 месяца назад

Thanks Matt! Great tips.

@muhsindogrular9805 10 месяцев назад

please test ATU-10, QRP, battery, latch relays, 705 ready.

@houseofhamradio 10 месяцев назад

Thanks for the suggestion. I will add it to the list. Will likely be awhile as I don't currently have one.

@keathrhymer5449 Год назад

just goto ne already built from amazon no instructions with it what is the a/m button on the back ? nd it doesnt look lke the ones i have seen in videaos

@houseofhamradio Год назад

There are a number of variations of this design. Some have batteries some have different buttons and displays. It is hard to tell which one you got. I have not seen one with a button on the back. Sorry I can’t be more help.

@keathrhymer5449 Год назад

@@houseofhamradio its a little push button on the lower right side wierd

@JJ-el8li 11 месяцев назад

@@keathrhymer5449 Automatic Tuning/Manual Tuning?

@RedNeckSurgeyTech Год назад

So does it work or not?

@houseofhamradio Год назад

It does work. It doesn't always get as good of a match as my built in tuner to my FTdx-10 or my KX2 but it does work.

@tzm1843 7 месяцев назад

AT100M starts at 0.1 watts?

@houseofhamradio 7 месяцев назад

The meter will read down that low. They recommend that you use at least 5 watts to tune and I have seen others that state that it tunes better with 10W.

@Howard1471 5 месяцев назад

Sorry, but this video doesn't tell me if it's any good or not. Build quality isn't always good ? Same could be said for anything Chinese, or even American (MFJ) which I've heard numerous times. Other than that this video hasn't told me anything. Does it perform well with the various popular antenna configurations ?, How easy is it to use, what to do about the missing buttons etc.

@houseofhamradio 5 месяцев назад

I would say it is OK. The design by N7DDC is actually pretty good. The issues lie with quality control of the fully assembled versions. You may get a good one and be all set. You could also get a lemon. This isn't exclusive to the Fully assembled ones. Even the kits tend to use some substandard materials. If you need something really reliable, I would opt for the LDG. If you are looking to save a few bucks, this isn't a bad option.