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AT140 Automatic HF antenna tuner AT-140 for with the ICOM M802 SSB
Automatic antenna tuner AT-140 FOR HF SSB works with the ICOM M802 SSB radio
List Price: $710.00
Your Price: $555.00
You Save: $155.00 (22 %)

Detailed Description

AT-140 - HF Automatic Antenna Tuner
Tune in your HF marine world

Tuner for M802

When connected to the M802, the AT-140 automatically bypasses e-mail and shortwave listening, the AT-140 allows use of the entire antenna for best reception. Get fast frequency access without missing communication opportunities! The AT-140 comes ready for simple antenna cable and power connections. Install the unit near the antenna element base.


  • Completely weather-resistant acrylic case with rubber gaskets
  • 45 memories for shorter tuning times
  • Quick Low power tune-up
  • Pre-wired cable connection points, just plug and play
  • Dimensions: 230 (w) x 340 (H) x 80 (D) mm
  • Antenna connector: SO-239
  • Max. Input Power: 150 W (PEP) 100 W (continuous)
  • Automatic tuning time: Approx 2-3 seconds

Suitable for many vessels
The versatile AT-140 can be used with a variety of vessels, even smaller boats that cannot use a long antenna element. For example, the AT-140 will match a 7 m (23 feet) long wire antenna across the marine band in the 1.6 - 27.5 MHz range.

Automatic tuning
No manual tuning is needed. Just push the [TUNE] switch on an Icom HF marine transceiver; the AT-140 adjusts the antenna and the transceiver to the minimum SWR in any frequency on an HF marine band. The AT-140 allows you to transmit with strong RF output power, and is perfect for maritime mobile operations.

Weather resistant
The AT-140 is housed in a durable, completely weather-resistant acrylic case with rubber gaskets. This allows it to be conveniently installed near the antenna element base.

For Icom HF marine transceivers
Icom's sophisticated AT-140 easily matches Icom HF marine transceivers. The AT-140 easily interconnects with an Icom HF marine transceiver. AT-140 installation is simple. No adjustments are necessary. Just connect the control cable and antenna wire and go!

Quick tune-up
Improved tuning performance...the tune-up time is less than 3 seconds in any frequency on an HF marine band. In addition, the AT-140 has 45 convenient memories to store tuning information. Retuning for a memorized frequency takes about 1 second. This allows you quick trouble-free frequency changes.

Low power tune-up
The AT-140 emits very little output power (just 300 mW) during the tuning process. This reduces the possibility of causing interference to other stations using the frequency.


  • Dimensions: 230(W) x 340(H) x 80(D) mm; 9.1(W) x 13.4(H) x 3.1(D) in (projections not included)
  • Weight: 2.5 kg; 5.5 lb
  • Usable Temperature Range: -30°C ~ +60°C
  • Rated Voltage: 13.6 V DC +/-15% (negative ground) (supplied from an Icom HF marine transceiver)
  • Current Drain (at 13.6 V DC): 2 A
  • Frequency Coverage: 1.6~30 MHz (with the antenna length 7 m (23 ft) or longer)
  • Input Impedance: 50 ohms (unbalanced)
  • Max. Input Power: 150 W (PEP)
  • Input Power During Tuning: 10 W
  • Auto Tuning Time: 1 sec. (returning for a memorized frequency), typically 2~3 sec. (when operating band has been changed)
  • Auto Tuning Accuracy: VSWR 2.0:1
  • Insertion Loss: 0.5 dB (with a 50 ohms load, after tuning)
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