ICOM 217800 Manuale Utente

2

■

After unpacking, immediately report any damage to the
delivering carrier or dealer. Keep the shipping cartons.

For a description and a diagram of accessory equip-
ment included with the IC-756PROIII, see ‘Supplied
accessories’ on p. i of this manual.

■

Select a location for the transceiver that allows ade-
quate air circulation, free from extreme heat, cold, or
vibrations, and away from TV sets, TV antenna ele-
ments, radios and other electromagnetic sources.

The base of the transceiver has an adjustable stand
for desktop use. Set the stand to one of two angles de-
pending on your operating conditions.

■

To  prevent electrical shock, television interference
(TVI), broadcast interference (BCI) and other prob-
lems, ground the transceiver through the GROUND
terminal on the rear panel.

For best results, connect a heavy gauge wire or strap
to a long earth-sunk copper rod. Make the distance be-
tween the [GND] terminal and ground as short as pos-
sible.

R

connect the [GND]

terminal to a gas or electric pipe, since the connec-
tion could cause an explosion or electric shock.

■

For radio communications, the antenna is of critical im-
portance, along with output power and sensitivity. Se-
lect antenna(s), such as a well-matched 50 Ω antenna,
and feedline. 1.5:1 or better of Voltage Standing Wave
Ratio (VSWR) is recommended for your desired band.
Of course, the transmission line should be a coaxial
cable.

When using 1 antenna, use the [ANT1] connector.

Protect your transceiver from lightning

by using a lightning arrestor.

Each antenna is tuned for a specified frequency
range and SWR may be increased out-of-range.
When the SWR is higher than approx. 2.0:1, the
transceiver’s power drops to protect the final transis-
tor. In this case, an antenna tuner is useful to match
the transceiver and antenna. Low SWR allows full
power for transmitting even when using the antenna
tuner. The IC-756PROIII has an SWR meter to mon-
itor the antenna SWR continuously.

30 mm ≈

9

⁄

8

in   10 mm ≈

3

⁄

8

in   1–2 mm ≈

1

⁄

16

in

30 mm

10 mm (soft solder)

10 mm

1–2 mm

solder solder

Soft
solder

Coupling ring

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

Slide the connector 
body on and solder it.

Screw the coupling 
ring onto the 
connector body.

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

q

w

e

r

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