User manual ICOM AH-4

[. . . ] Please read these instructions thoroughly before using the AH-4. I Antenna description READ ALL INSTRUCTIONS carefully and completely before using the AH-4. SAVE THIS INSTRUCTION SHEET!-- This instruction contains important safety and operating details for the AH-4. Top element I PRECAUTION R WARNING: HIGH VOLTAGE! [. . . ] This may result electrical shock or burn. R WARNING SUSPEND operation immediately or NEVER put up the antenna when thunder occurs or can be heard in the distance. R WARNING NEVER assemble or disassemble the antenna at any crowded area. USE the AH-4 for portable operation with the IC-703 ONLY. NEVER install the antenna to a vehicle for mobile operation. DISCONNECT the antenna when not using the antenna for long period of time. e Attach the grounding wires to the [GND] terminal of the IC-703 rear panel as illustrated below. · Keep the grounding wires in the LC-156 side pockets via the cable hole. · Keep the separation cable on the outside of the LC-156. Adjustable Tighten Loosen AH-4 controller case IC-703 ; ; ; ; ; ; ; t Repeat the steps e and r until the VSWR becomes better than 1. 5:1. Separation cable Pass the grounding wire through the cable hole and keep in the side pocket. I Operation hints K The IC-703 separation cable may work as the grounding cable (counterpoise). Changing the cable wiring may also provide better VSWR. K The quality of communication during portable operation depends on the operating frequency, field condition, etc. When the operating condition is not good, changing the place of operation may help improve operating performance. K When changing the operating frequency, manual tuning is helpful for good operation. [. . . ] K When changing the operating frequency, manual tuning is helpful for good operation. Even changing the frequency 10 kHz, you should start with manual tuning. The above illustration is example only When SWR cannot be reduced, abnormal functioning of the transceiver may occur, etc. , change the cables (grounding, separation, DC power and microphone cables) wiring, as described in the "I Operation hints". I Adjusting the antenna q Set the desired operating frequency on the IC-703. [. . . ]