User manual ICOM AT-180

[. . . ] Place the AT-180, antenna and counterpoise in positions where no one can touch them. NEVER use without a ground connection. NEVER transmit during internal adjustment. This may cause an electric shock. IMPORTANT READ ALL INSTRUCTIONS carefully and completely before using the AT-180. USE the ground terminal for ground connection. The mounting plate is not connected internally. SAVE THIS INSTRUCTION MANUAL. This instruction manual contains important safety and installation instructions. Ground terminal EXPLICIT DEFINITIONS Mounting plate Word Definition Personal injury, fire hazard or electric R WARNING shock may occur. [. . . ] Low power tune up The AT-180 emits low output power during tuning. This feature reduces the possibility of causing interference to other stations. Tuner through function The tuner through function is built into the AT-180. This function helps improve receiver gain, depending on the antenna element length used, and operating frequency. TABLE OF CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii 1 ANTENNA SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1­2 I Antenna for ship . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 I Antenna for land operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 I Coaxial cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 I Ground and counterpoise . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2 INSTALLATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3­5 I lnstallation outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Grounding prevents electric shocks, interference to other equipment and other problems. Grounding also ensures effective signal transmission. Counterpoise If your ship is made of FRP, etc. and a good ship's ground is not available, connect a counterpoise. 1/4 radial for each band Ground terminal DANGER!NEVER connect the ground terminal to the following points. These connections may cause an explosion or electric shocks: ­ Gas or electrical pipe ­ Fuel tank or oil-catch pan AT-180 IMPORTANT!The mounting plate is NOT connected to the AT-180's internal ground. Ideal ground points One of following points is ideal: ­ External ground plate ­ External copper screen ­ External copper foil (quarter wavelength) radial for each band is suitable for a counterpoise. Install the counterpoise directly below the AT-180's ground terminal. Insulate the ends of each radial from other metal objects. Layout the radial horizontally and as straight as possible. L : Counterpoise length for the operating frequency [m] f : Operating frequency [MHz] L= 300 1 × f 4 1/4 Good ground points If electrically connected to sea water, one of the following points is usable: ­ Stainless steel stanchion ­ Through mast ­ Through hull ­ Metal water tank [Example] At an operating frequency of 16 MHz, use a counterpoise with the following length: L= 1m Undesirable ground points AVOID the following points, if possible. These connections may cause noise or electrolysis: ­ Engine block ­ Ship's DC battery ground 300 1 × 16 4 39 inches 4. 7 [m] Ground cable For best results, use the heaviest gauge wire or metal strap available. Make the distance between the AT140's ground terminal and ship's ground as short as possible. [. . . ] Strip the cable jacket and pull back to reveal 10 mm of braid. · Soft solder the exposed braid and then pull out the jacket. Coupling 30 mm e Slide the connector body over the cable and solder as shown below. Solder Solder r Screw the coupling ring onto the connector body. 10 mm (soft solder) w Strip the cable as shown below. Soft solder the center conductor the entire length of the exposed braid. 10 mm 10 mm 3/8 1­2 mm soft solder inches I Mounting Attach the AT-180 either horizontally or vertically with one of the water drains facing downwards. After mounting, remove the screw in the water drain. Mounting on a flat surface Using nuts and bolts Using self-tapping screws Mounting on a Mast/Metal pole Mast/ Using Metal pole U-bolt U-bolt plate Flat washer(L) Spring washer Flat washer(S) Nut Nut Flat washer(S) Spring washer Flat washer(L) U-bolts WARNING: Mount the AT-180 securely with the supplied nuts and bolts. [. . . ]