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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I recently got my brand new AT working. My main gripe is the manual. For a new frequency, it takes between 2 and 10 seconds.

Should be a interesting experiment. I have successfully interfaced it to my Kenwood TSS, making only minor, easily reversible modifications. Use a antenna of at least 35 feet. What it really means is “ground this input if you want it to start tuning”. icm

Icom AT-130 Antenna Tuner

No problem in tuning a long wire. Reviews Summary for Icom AT I’m having a devil of a time getting this tuner to talk with a Barrett marine HF radio. It has accompanied me to at least two different ships to be used with end-fed wire antennas. The manual says words to the effect of “Voltage input to trigger the start icm the tuning cycle. This unit works great with the following Icom radios, IC-mkii, mkiig and pro3. The AT manual is very skimpy.


The versatile AT can be used with a variety of vessels, even smaller boats that cannot use a long antenna element. It seems to gloss over the requirements if it is not connected to an Icom HF set.

ICOM AT – Techno Marine – Marine Safety & Electronics

Give it a better than average ground. By design, it wants to end feed a random wire.

Iclm closer to 2. The pain that I experienced was the “start” input. The AT allows you to transmit with strong RF output power, and is perfect for maritime mobile operations. My Subscriptions Subscriptions Help. I purchased the unit while I was on holiday so I’d be forced to read through the manual for a few days before trying to jcom it up. Improved tuning performance…the tune-up time is less than 3 seconds in any frequency on an HF marine band.

My only beef is the unit’s inability to tune a balanced antenna. This allows it to be conveniently installed near the antenna element base. Low power tune-up The AT emits very little output power just mW during the tuning process.

Retuning for a memorized frequency takes about 1. One drawback to using the AT with the is that every time I would change bands or frequency ranges the tuner would automatically tune.

My icmo 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.


AT-130 Downloads

As its a commercial unit and unlikely to be connected to a non-icom HF set, I can see why this has gone undetected. Normally 8 Volts, when less than 1 volt is recieved a tune cycle will commence”. Getting the AT to autotune when it sees a new carrier seems impossible.

Getting it to play with non – Icom radios is possible, but probably not in a fully automatic sense. I repair marine electronic equipment for a living, so I have the advantage of being very familiar with this unit. No adjustments are necessary.

You have to manually start the tuning process for any new frequency. Email Subscription You are not subscribed to this review. For example, the AT will match a 7 m 23 feet long wire antenna across the marine band in the 1. Use a choke balun to reduce shield radiation. 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!

The main benefit of the ‘ is cost. Sadly, it is not compatible with a balun