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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Retuning for a memorized frequency takes about 1. AT installation is simple. After some dramas rigging up an antenna mainly a height issuethe unit appears to work well. Usually closer to 2.
When tuning the same frequency twice, it is all over in less than a second. The manual says words to the effect of “Voltage input to trigger the start of the tuning cycle.
If you have any questions, problems, or suggestions about Reviews, please email your Reviews Manager. One drawback to using the AT with the is that every time I would change bands or frequency ranges the tuner would automatically tune. For example, the AT will match a 7 m 23 feet long wire antenna across the marine band in the 1. Normally 8 Volts, when less than 1 volt is recieved a tune cycle will commence”.
Just lately it stopped doing that.
AT Downloads – Icom America
It is a capable tuner if you observe the following measures: I’m limited as to the amount of RF i can put through it but watts is OK for me and as i said i have a balanced antenna i just connect the open wire feeder directly to the atu, one leg of the feeder to the hot side and the other to the ground, and a common mode choke at the feed point between atu and transceiver.
The AT is housed in a durable, completely weather-resistant acrylic case with rubber gaskets. 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! If you want the technical details, send me a email.
By design, it wants to end feed a random wire. The AT emits very little output power just mW during the tuning process. 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.
No manual tuning is needed. No problem in tuning a long wire. The versatile AT can be used with a variety of vessels, even smaller boats that cannot use a long antenna element.
Unacceptable in a marine HF system. Automatic tuning No manual tuning is needed.
New to Ham Radio? This unit works great with the following Icom radios, IC-mkii, mkiig and pro3. What it really means is “ground this input if you want it to start tuning”. I normally turn my down to watts which is plenty.
This reduces the possibility of causing interference to other stations using the frequency. This allows you quick trouble-free frequency changes. Just connect the control cable and antenna icok and go! Still, a bit of a let down.
The main benefit of the ‘ is cost. Give it a better than average ground. Use a antenna of at least 35 feet.
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