ICOM AT-140 HF Automatic Antenna Tuner

The Icom AT-140 is an antenna tuner designed for use with marine radios. Here are some key features of the AT-140:

Frequency Range: It operates in the frequency range of 1.6 MHz to 30 MHz (with a 7-meter or 23.0-foot antenna element or longer).
Power Handling: The AT-140 can handle a maximum input power of 150 watts (PEP) or 100 watts continuous.
Automatic Tuning: It tunes automatically in approximately 2 to 3 seconds under general conditions, with a maximum of 15 seconds. For re-tuning to a memorized frequency, it takes about 1 second.
Tuning Accuracy: The automatic tuning accuracy achieves an SWR of 2.0:1 (except for multiples of 1/2 λ).
Antenna Connector: It features an SO-239 connector (50 Ω).
Operating Temperature Range: The AT-140 can function in temperatures ranging from -30°C to +60°C (or -22°F to +140°F).

The AT-140 is recommended as an ideal companion for the Icom IC-M802 Single Side Band marine radio. It also works well with other Icom SSB marine radios such as the IC-M710 and IC-M700PRO. If you’re setting sail, this tuner will help keep your radio communication shipshape! 🚢📻

Specifications

Weight (approx.)	2.5 kg; 5.5 lb
Power supply requirement	13.6 V DC (supplied from the HF transceiver)
Current drain	Maximum 2 A
Operating temperature range	–30°C to +60°C (–22°F to +140°F)
Antenna connector	SO-239 (50 Ω)
Maximum Input power	150 W (PEP) 100 W (continuous)
Automatic tuning time	Approximately 2 to 3 seconds (general condition) Maximum 15 seconds Approximately 1 second (re-tuning for a memorized frequency)
Automatic tuning accuracy	SWR 2.0:1 (after tuning, except for multiples of 1⁄2 λ)
Usable pole diameter	32 to 60 mm; 1.3 to 2.4 inches