Icom_AH-4_user.pdf

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1、q U-bolts . 2 w U-bolt plates . 2 e Flat washers (M6 large) . 8 r Flat washers (M6 small) . 4 t Spring washers (M6) . 8 y Nuts (M6) . 8 u Hex head bolts (M6 50) . 4 i Self-tapping screws (A0 6 30) . 4 o PL-259 connectors . 2 !0 Weatherproof cap . 1 !1 Control cable (OPC-136; 5 m). 1 !2 Coaxial cable

2、 (5D-2V 5 m) . 1 INSTRUCTIONS HF + 50 MHz AUTOMATIC ANTENNA TUNER AH-4 Thank you for purchasing the AH-4 AUTOMATIC ANTENNA TUNER. The AH-4 matches your trans- ceiver to an antenna more than 7 m/23 ft long (3.5 MHz and above). Please read these instructions thoroughly before in- stalling and operatin

3、g the AH-4. RNEVER use this tuner when it is ungrounded. Always ground the tuner through the ground terminal before operating. DO NOT use the mounting plates for grounding. NEVER transmit or tune without an antenna. Failure to use an antenna will damage the tuner. RHIGH VOLTAGE! NEVER touch the ante

4、nna while transmitting or tuning. Place the antenna in a position where you are sure it will not be touched. DANGER WIDE TUNING RANGE 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 E

5、LEMENT. AUTOMATIC DIGITAL CONTROL TUNING 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 frequen- cies are automatically memorized i

6、n 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. WEATHERPROOF DESIGN The AH-4s tightly sealed plastic case allows c

7、onve- nient 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 a

8、nd IC- 736 can only be tuned 3.530 MHz. * Connect a 50 MHz antenna connector for 50 MHz operation. FEATURES SUPPLIED ACCESSORIES Ground terminal Mounting plate q w e r t y u i o!0 Provided by? http:/www.yaesu-? ? Downloaded by? Amateur Radio Directory Fig. 2 CABLE CONNECTIONS (ex. IC-706MKII) Coaxia

9、l cable IC-706MKII rear panel Control cable Bottom cover GND Top cover PL-259 connector Antenna element AH-2b (optional) J8 J2 black (GND) red (DC13V) white (START) green (KEY) GND NOTE: After inserting the coaxial cable into the AH- 4 top cover, solder the PL-259 connector to the coaxial cable. Rem

10、ove the top cover (Fig. 1). Install the control cable and coaxial cable (Fig. 1). Connect and solder the PL-259 connector to the coaxial cable (Fig. 4). Connect the control cable to the AH-4 (Fig. 2). Connect the GND cable to the AH-4 (Fig. 3). Replace the top cover. Mount the AH-4 in the desired lo

11、cation; on an an- tenna pole, in your vehicles trunk, etc. (Fig. 5). Connect an antenna to the AH-4 (Fig. 6). Connect the control cable and the coaxial cable to the transceiver. INSTALLATION Fig. 1 COVER REMOVAL AND CABLE INSTALLATION Remove 8 screws from the top cover and remove the cover. Loosen t

12、he screws on both cable clamps. If de- sired, install a strain relief insert (supplied) corre- sponding to the diameter of the cable. Install the coaxial cable through the top cover cable clamp. Install the control cable through the bottom cover cable clamp. After connecting the coaxial cable and co

13、ntrol ca- bles, tighten the cable clamp screws. Strain relief insert Coaxial cable Control cable Cable clamp NOTE: For the IC-756 and IC-746, connect to ANT 1. Fig. 3 GROUND CONNECTIONS Copper pipeMetal objectCopper screen ? ? ? ? yyyyyy yyyyyy yyyyyy yyyyyy To AH-4 GND terminal The transceiver and

14、antenna tuner must have an ade- quate ground connection. Otherwise, the overall ef- fency of the transceiver and antenna tuner installation will be reduced. Interference, RF feed back and elec- trical shocks from other equipment could also occur. For best results, use the heaviest gauge wire or stra

15、p available and make the connection as short as possi- ble. (see right) A long wire connected to the GND terminal as a counter- poise is also acceptable. Ground example Fig. 5 MOUNTING THE AH-4 Mounting on an antenna pole Mounting on a fl at location Fig. 6 MOUNTING EXAMPLES Fig. 4 PL-259 CONNECTOR

16、SOLDERING Slide the coupling ring over the coaxial cable. Strip the cable jacket and pull it down to reveal 10 mm (0.4 in) of braid. Soft solder the exposed braid and then pull the jacket back in place. Strip the cable as shown at left. Tin the center con- ductor the entire length of the exposed bra

17、id. Slide the connector body over the cable and sol- der as shown at left. Screw the coupling ring onto to the connector body. 30 mm 10 mm (soft solder) 10 mm 12 mm solder solder Soft solder Coupling ring (10 mm 38 in) AH-2b + long wireAH-2b ANTENNA ELEMENT KIT (optional) Nut AH-4 Spring washer Flat

18、 washer Hex head bolt Drill a hole here (diameter: 6.67 mm) Weatherproof cap Using the supplied U-bolts Using self-tapping screwsUsing nuts and bolts The AH-4 complies with essential requirements of the 89/336/EEC directive for Electromagnetic Compatibility. This compliance is based on conformity wi

19、th the ETSI specification ETS300 684 (EMC product standard for Commercially Available Amateur Radio Equipment). Frequency range: 3.554 MHz (with an antenna longer than 7 m; 23 ft) 754 MHz (with the AH-2b) Maximum input power: 120 W Input impedance: 50 Tuning power required: 10 W (515 W) Rated voltag

20、e: 13.8 V DC 15% (current drain less than 1 A) Usable temperature range: 10C to +60C (+14F to +140F) 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; 62532(W) 634(H) 9116(D) in All specifi cations

21、are subject to change without notice or obligation. 6-9-16 Kamihigashi, Hirano-ku, Osaka 547-0002 Japan Count on us! A-8295G-1EXPrinted in Japan Copyright 1997 by Icom Inc. To ensure the correct impedance match, tune the an- tenna with the AH-4 each time the operating frequency is changed. Set the d

22、esired amateur band and frequency of the transceiver. Push and hold TUNER for 2 sec. The TUNER light fl ashes and “CW” appears while tun- ing. The TUNER light lights constantly when tuning is complete. When the connected wire cannot be tuned, the TUNER light goes out, the AH-4 is bypassed and the an

23、tenna wire is connected to the antenna connector on the trans- ceiver directly. To bypass the AH-4 manually, push TUNER. OPERATION SPECIFICATIONS CALCULATION OF UNDESIRABLE ANTENNA LENGTHS Length of 300 1 (1/2 ) = half wave operating frequency (MHz)2 EXAMPLE Antenna lengths to avoid when operat- ing

24、 at 29.00 MHz Multiple 300 1 (1, 2, 3) = 5.2, 10.3, 15.5 m = of 1/2 292 USB CW Push TUNER for 2 sec. OPC-420SHIELDED CONTROL CABLE(cable length 10 m) Shielded control cable helps protect the transceiver from RF feedback and extends separation between tuner and transceiver up to 10 m. AH-2bANTENNA ELEMENT A 2.5 m long antenna element for mobile operation with AH-4. Frequency coverage: 754 MHz with the AH-4. OPTIONS Provided by? http:/www.yaesu-? ? Downloaded by? Amateur Radio Directory