AT50 150W 1.9 - 54MHz HF Automatic Antenna Tuner

Here we build and test the AT50 Automatic Antenna Tuner. This ATU needs additional building once received. In this video we go through finishing the build and installing the included components.
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[@ronrico2620]

"More research on that is required" has been my daily catch phrase since I got into ham radio

[@gajahpesing]

It's been a year, I own and use this AT50.. Overall, this tool, never disappoints when transmiting with 100 watts of power..

[@NamasenITN]

Do you happen to know the original designer name or call sign?

[@gajahpesing]

@@NamasenITN sorry, i don't know. I bought from China

[@gajahpesing]

@@reedreamer9518 never, because i only had quarter wire. Sorry

[@siffler1234]

i bought one last year, still using it, i found using the recommended wire lengths for 9:1 ununs 53ft i think, and other lengths on OM0ET charts, bit ferrite as well

[@earlyadapter643]

It seems to be derived and improved based on the ATU100, as it also says so on the startup screen. Interesting that it doesnt need ferrites on the coils and how they are arranged perpendicularly to each other. Maybe the piece of coax was not supplied because if you place the SO-239 connector close enough to the solder pads, you can use any cable at these frequencies.

[@malcolmlewis3239]

Two questions
1) If you go back to a frequency you have already tuned does it remember it or does it tune again ?
2) If it does remember the tuning of a frequency that you have used, does it forget the tuning if the power is turned off then back on again ?

[@siffler1234]

automatic settings will tune while you "tx" i also change my mode to am (25watts max) key for a second then change back to ssb, its very quick, hope this helps mate

[@robertbosley4814]

Correct it would tune much easier if the length of wire was not near any multiple of a wave length as half wave length wil have a very high impedance say 2/3000 ohms and the tuner is probably only capable of matching say 1000 or so ohms... .. love all your vids thanks for sharing

[@mscir]

Great video, very thorough, well done. I would like to see the MAP40 tuner video.

[@TechMindsOfficial]

Thank Mike!

[@williamstaylor5449]

Nice video, and +1 for a MAT tuner video.

[@oliverw.douglas285]

I'd be curious to see how this operates on lowland VHF (25-54 MHz). From my experience, the driven element is best tuned for the lowest operating frequency. Antenna tuners are better able to make longer length antennas look shorter, than shorter length antennas look longer, from an electrical/resonance perspective.

[@TheEmbeddedHobbyist]

Shame they did not make the PCB fit the enclosure mounting posts would have saved drilling holes in it. Less holes are better for keeping the water out.

[@ifell3]

If this was recorded on Friday I can vouch for the thunder aha
I've always seen tuners as a handicap.

[@32_bits]

Your Matt tuner would make a good review video. Also do you have a SCULAN for your FTDX10? IMHO its the best option for the radio.

[@Andy2e0ree]

Good one Matt I us one it works great when i when in and changed the bios

[@oscarvilla5121]

Greetings, I bought one recently, what I don't have is the manual, for connecting the screen, please, where can I find the manual? Good, very explanatory video, although the language separates us a little, thanks for the info. CE5CSV Oscar

[@pvdk]

Hi Matt, I've been using this kind of couplers for a long time. I had different makes and brands. The best I got was the 1 KW JC4S tuner by Stockcorner. Your video shows why you can't use 1/2 lambda or multiples of thos wire lenghts. You need non resonant wire lenghts that stay away from hambands. I did many A/B tests with endfed antennas and rondom wire with tuner. Sometimes the tuner and random wire was stronger, sometimes not. It depends on the position of the antennas ofcourse. A pretuned matched antenna in my opinion has a little less noise but the big advantage is that you can work many bands with a single random wire. Keep up the great videos ! 73 Phil ON4VP

[@9V1SA]

Thanks for another great video. I bought one of these and it fires up ok. I am wondering if anyone has figured out what range of antenna impedances it’s optimised for. I have not been able to get hold of a schematic but I see from the PCB that there is only a single endsd unbalanced output that looks like it’s designed specifically to directly drive end fed mid to high impedance wires without a transformer? If so it is different to most of the N7DDC kits out there which seem optimised for lower impedance loads (though of course they could drive any load with an appropriate transformer). If anyone has data on the range of load impedances this ATU drives out of the box I would be grateful

[@MakeDoAndMend1]

Just wondered shouldn't there be a screening tin shield soldered to the square thick track on circuit board. George

[@WT2D-Michel]

Please bring back the old music intro, I own also an FTDX10. Matt do you think this AT will work on 160 mts with a random wire?

[@andrewdunham720]

Yes i would like to see you using MAT 40. I have a MAT 30. Cheers Andy G6OHM.

[@foxonem7dfh257]

Please do the video on the MAT tuner Matt

[@Steve-GM0HUU]

👍 Thanks for video. As per otner comments, also wondered if adding a 9:1 UNUN at the "ATU" or using a legnth of wire not half-wave (or multiple of) resonant on any of the bands you want may help? Possibly, even try both? Although the antena element is not resonant, with the ATU at the feedpoint, it shouid make for an efficient system. Probably more efficent than having the ATU in your rig or shack.

[@petermiles6557]

Agree, most auto tuners work well as you have said.

[@rjy8960]

I'd expect a close to resonant half-wave to be a difficult match as it is the highest point of impedance, so using a 9:1 unun will probably help there although there are lengths of wire which are not resonant on any of the amateur bands that are suggested and again they can be used with a 9:1 unun into the tuner.

[@NamasenITN]

Did you manage to find the data sheet or technical specs of the item?

[@whothefoxcares]

The case must fit or you must acquit. Really. Why not tell the kit seller to get cases with mounting points at appropriate locations to #DOMINATE the market.

[@petermiles6557]

I've found that most auto-tuners are much happier if you connect through a 1:9 unun or 1:9 balun and use a no-resonant antenna wire.

[@chadx8269]

Show a schematic or block diagram.

[@noisetinker]

Multiples of half wave should be avoided. Too high impedance to match. There are good tables of good easy to tune lengths. If I remember correctly 12.5m is a good length for 40m and up.

[@nayanjagirdar8408]

👍

[@wave-bomber]

I want your original intro😢

[@Swaggerlot]

Just to let you know that I won't be dealing with TH-cam again, more to do with the rubbish they send our way with impunity and nothing to do with your channel content.

[@James_Bowie]

Google ad block for TH-cam.

[@TechMindsOfficial]

Then we all stop making content for you all to watch for free! Simple!

[@JohnHill-qo3hb]

Further to the ads, I don't mind legitimate ads, what bends my chassis is the double standard YT uses. You mustn't create "offensive" videos, but YT has no problem with pushing scam/snake oil ads like "Just drink a glass of warm water every night before bed to drive tinnitus away".@@TechMindsOfficial