HF+ 50 MHz AUTOMATIC ANTENNA TUNER

Tune-up from HF through 50 MHz band

Tunes wide frequency coverage Ample memory channels for quick tuning
Covers all amateur bands from 3.5 MHz through 50 MHz with a 7 Up to 45 memory channels store minimum SWR settings to provide
m (23 ft) or longer wire antenna, or the optional AH-2b ANTENNA quick re-tuning.
ELEMENT.
Mobile operation
Compact yet durable Mobile operation is possible with the optional AH-2b ANTENNA EL-
The AH-4 measures only 172(W)✕71(H)✕230(D) mm*, for easy in- EMENT. The AH-2b includes a sturdy bumper mount antenna and
stallation in a variety of locations, outdoors, on a back porch or in can hold a 2.5 m (8.2 ft) stainless steel antenna plus necessary
your vehicle. Weather-resistant construction, using rubber gasket hardware. This combination system provides 7–50 MHz band mo-
seals, enables operation in all conditions. bile operation.
*6.77(W)✕2.8(H)✕9.06(D) in
Low power tune-up
Full automatic tuning The AH-4 emits only 300 mW of RF output while tuning. This elimi-
The AH-4 is designed for use with Icom HF transceivers.* Just push nates the possibility of interference with other stations.
[TUNER] switch on the transceiver and the AH-4 adjusts imediately
to the minimum SWR. The AH-4 automatically performs tuning op- Simple installation
erations for mode, power settings, etc. The average tune-up time is The installation is simple. No adjustments are necessary. Just con-
less than 2.5 sec. on each band. nect the control and antenna cables.
*Ask about Icom HF transceivers at your nearest authorized Icom dealer.
HF+ 50 MHz AUTOMATIC ANTENNA TUNER

SPECIFICATIONS
• Tunable frequency range : 3.5 MHz to 54 MHz • Auto tuning accuracy : VSWR 2.0:1 or less
(with a long wire antenna, 7 m; 23 ft or longer) (except λ⁄2 of antenna length and its mulitples)
7 MHz to 54 MHz (with an optional AH-2b) • Power supply requirement : 13.8 V DC ±15 % (negative ground)
• Maximum input power : 120 W PEP • Current drain : Less than 1 A
• Input impedance : 50 Ω • Number of memory ch. : 45
• Input power requirement for tuning: • Usable temperature range : –10˚C to +60˚C; +14˚F to +140˚F
10 W (5–15 W)
• Dimensions (proj. not incl.) : 172(W)✕71(H)✕230(D) mm
• Auto tuning time : Approx. 1 sec. ; 6.77(W)✕2.8(H)✕9.06(D) in
(retuning for a memorized frequency)
Approx. 2–3 sec. • Weight : 1.2 kg; 2.65 lb
(when operating band has been changed)
Max. 15 sec. All stated specifications are subject to change without notice or obligation.

Supplied accessaries
● Mounting kit ● Insulation cover ● Coaxial cable (5 m; 16.4 ft)
● Control cable (5m; 16 ft 5 in) ● PL-259 plugs

71 mm;
2.8 in

230 mm; 9.06 in

172 mm;
6.77 in

OPTION INTERNAL VIEW

• AH-2b ANTENNA ELEMENT
For mobile operation, etc. Covers 7 MHz to 54
MHz with the AH-4. Bumper mount and hard-
ware included.
• Element length : Approx. 2.5 m; 8.2 ft
• Feedline length : Approx. 0.9 m; 3.0 ft
(between the AH-4 and AH-2b)
• Freq. coverage : 7–54 MHz bands
(with the AH-4)

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