ICOM AH-4 Antenna tuner: long wire/whip, outdoor. The AH-4 provides reliable matching of frequencies from 3.5 MHz to 54 MHz when using at least a 7 m (23 ft) antenna; or 7 MHz to 54 MHz when using the AH-2b ANTENNA ELEMENT.
The built-in 8-bit microprocessor chooses the lowest SWR condition from more than 1,040,000 different LC (coil/capacitor) combinations. 45 FREQUENCY MEMORIES FOR FAST TUNING. The LC combinations of 45 previously-used frequencies are automatically memorized in the AH-4.
Once a frequency is memorized, the AH-4 tunes on that frequency in less than 1 sec. Note that the AH-4 does not memorize a frequency which is normally tuned within 2.5 sec. Memories are retained only when the power is on. The AH-4s tightly sealed plastic case allows convenient mounting virtually anywhere.The AH-4 can be mounted outdoors under your antenna. 0.3 W RADIATED POWER.
Radiated power during tuning is less than 0.3 W, minimizing interference to other stations. NOTE: 50 MHz tuning is possible with the IC-729, IC-706MKII, IC-746 and IC-756; the IC-706 and IC-736 can only be tuned 3.530 MHz. Connect a 50 MHz antenna connector for 50 MHz operation. Compatible with most Icom HF radios, including but not limited to. Icom 703, 703+, 706 MkIIG, 718, 746, 746Pro, 756, 756Pro, 756ProII, 756ProIII, 7000, 7100, 7200, 7300, 7410, 7600, 7800, 9100.
3.554 MHz (with an antenna longer than 7 m; 23 ft). 754 MHz (with the AH-2b). Maximum input power: 120 W. Tuning power required: 10 W (515 W). Rated voltage: 13.8 V DC ±15% (current drain less than 1 A).
Usable temperature range: 10°C to +60°C (+14°F to +140°F). VSWR: 2.0 : 1 or less (except antennas a half wave or multiple of a half wave in length). Weight: 1.2 kg (2.65 lb).
Dimensions: 172(W) × 69.5(H) × 230(D) mm; 6 25/32(W) × 6 3/4(H) × 9 1/16(D) inches. Icom AH-4 Antenna Tuner - 1. Flat washers (M6 large) - 8.
Flat washers (M6 small) - 4. Spring washers (M6) - 8. Hex head bolts (M6 × 50) - 4. Self-tapping screws (A0 6 × 30) - 4.
Control cable (OPC-136; 5 m) - 1. Coaxial cable (5D-2V × 5 m) - 1. GigaParts ships from multiple locations across the USA, so a portion of your order may come from two different warehouses. Modified radios do not qualify for direct replacement unless GigaParts performed the modification.
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