Icom automatic antenna tuner, Manufacturer’s Part Number AT, matches the SSB transceiver to a long wire or whip antenna with little insertion loss. for the AT/ATE/AT HF AUTOMATIC ANTENNA are registered trademarks of Icom Incorporated (Japan) in the United States, the United Kingdom. Find great deals for Icom AT Shop with confidence on eBay!.

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The manual says words to the effect of “Voltage input to trigger the start of the tuning cycle. When tuning the same frequency twice, it is all over in less than a second. It only takes a couple of watts of RF to figure out what to do. Now when I press the “voice” button that is normally used for the voice synthesizer option – not installed the tuner begins it process.

After some dramas rigging up an antenna mainly a height issuethe unit appears to work well.

Improved tuning performance…the tune-up time is less than 3 seconds in any frequency on an HF marine band. This unit works great with the following Icom radios, IC-mkii, mkiig and pro3. This line needs to be connected to your radio in a way that causes it to go into the transmit mode, and produce about 10 – 15 watts of rf – NOT full TX power! At home I was feeding my balanced antenna with open-wire feeders icok from the AT with no choke on the coax and control line.


ICOM AT – Techno Marine – Marine Safety & Electronics

I normally turn my down to watts which is plenty. One drawback to using the AT with the is that every time I would change bands or frequency ranges the tuner would automatically tune. Unacceptable in a marine HF system. My system consists of a 75′ random wire, 3 – 6 ‘ copper ground rods, connected to the tuner with copper strap, and 5 ground radials of various lengths more to come. I recently got at1130 brand new AT working. The AT is housed in a durable, completely weather-resistant acrylic icm with rubber gaskets.

The AT allows you to transmit with strong RF output power, and is perfect for maritime mobile operations.

My only beef is the unit’s inability to tune a balanced antenna. Give it a better than average ground.

For example, the AT will iicom a 7 m 23 feet long wire antenna across the marine band in the 1. This reduces the possibility of causing interference to other stations using the frequency. As its a commercial unit and unlikely to be connected to a non-icom HF set, I can see why this has gone undetected. No problem in tuning a long wire. Getting the AT to autotune when it iccom a new carrier seems impossible.

AT-130 Downloads

Quick tune-up Improved tuning performance…the tune-up time is less than 3 seconds in any frequency on an HF marine band. The AT emits very little output power just mW during the tuning process. Just connect the control cable and antenna wire and go! Contact the site with comments or questions. Email Subscription You are not subscribed to this review. It seems to gloss over the requirements if it is not connected to an Icom HF set. For a new frequency, it takes between 2 and 10 seconds.


Retuning for a memorized frequency takes about 1. The main benefit of the ‘ is cost.

If all antenna and ground requirements are met, the tuner will find a match pretty fast. Icomm it to play with non – Icom radios is possible, but probably not in a fully automatic sense.

By design, it wants to end feed a random wire. The pain that I experienced was the “start” input. Reviews Summary for Icom AT The AT manual is very skimpy. Usually closer to 2.

No manual tuning is needed. You have to manually start the tuning process for any new frequency. I have successfully interfaced it to my Kenwood TSS, making only minor, easily reversible modifications. What it really means is “ground this input if you want it to start tuning”.