Icom IC-R8500 Antenna connection, Grounding, D Using a long wire antenna for HF bands

HF ANT

2 CONNECTIONS

■Antenna connection ■Grounding

Antennas play a very important role in receiver opera- tion. Connecting a poor quality antenna to the IC-R8500 will result in less than optimum perfor- mance.

The IC-R8500 requires at least 2 antennas for full fre- quency coverage: one for 0.1 to 30 MHz and one for 30 to 2000 MHz.

DUsing a long wire antenna for HF bands

The IC-R8500 has a 500 Ω phono (RCA) antenna

connector for the HF bands. When using a long wire antenna, instead of a 50 Ω matched antenna, use one as long as possible (at least 10 m, 33 ft) and select the active connector as follows:

➀Push [SLEEP/ SET ] for 1 sec. to enter quick set

mode.

➁Rotate the [M-CH] selector to select the “HF ANT” item.

➂Rotate the main dial to select the antenna connector.

➃Push [SLEEP/ SET ] momentarily to exit quick set mode.

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RWARNING: NEVER use a gas pipe or electri- cal conduit pipe for grounding.

To prevent accidents involving electricity and interfer- ence from transceivers, ground the receiver through the [GND] terminal on the rear panel.

For best results, connect a heavy gauge cable to a water pipe or long, earth-sunk copper rod. Make the distance between the [GND] terminal and ground as short as possible.

TYPE-N CONNECTOR INSTALLATION EXAMPLE

➀	Nut Rubber gasket
	15 mm
	Clamp
	Washer
➁	3 mm 6 mm
	Center conductor

(10 mm ≈3⁄8 in)

Slide the nut, washer, rubber gasket and clamp over the coaxial cable, then cut the end of the cable evenly.

Strip the cable and fold the braid back over the clamp.

➂

➃

Solder hole

No space

Plug body

Soft solder the center conductor. Install the center conductor pin and solder it.

Carefully slide the plug body into place aligning the center conductor pin on the cable. Tighten the nut onto the plug body.

• Be sure the center conductor is the same height as the plug body.

PL-259 CONNECTOR INSTALLATION EXAMPLE

➀		30 mm
Coupling ring	10 mm (soft solder)
➁	10 mm Soft
			solder
		1–2 mm

(10 mm ≈3⁄8 in)

Slide the coupling ring down. Strip the cable jacket and soft solder.

Strip the cable as shown at left. Soft solder the center con- ductor.

➂

➃

solder solder Slide the connector body on and solder it.

Screw the coupling ring onto the connector body.

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