ICOM IC-706MKIIG User Manual
28
4
RECEIVE AND TRANSMIT
The AH-4 matches the IC-706MKIIG to a long wire
antenna more than 7 m/23 ft long (3.5 MHz and
above).
antenna more than 7 m/23 ft long (3.5 MHz and
above).
• See p. 14 for connection.
• See the AH-4 instruction manual for AH-4 installation and
• See the AH-4 instruction manual for AH-4 installation and
antenna connection details.
N
NE
EV
VE
ER
R operate the AH-4 without an antenna wire.
The tuner and transceiver will be damaged.
N
NE
EV
VE
ER
R operate the AH-4 when it is ungrounded.
Transmitting before tuning may damage the trans-
ceiver. Note that the AH-4 cannot tune when using a
ceiver. Note that the AH-4 cannot tune when using a
1
⁄
2
λ long wire or multiple of the operating frequency.
N
No
otte
e:: The AH-4 can be used for HF bands and the 50
MHz band only.
A
AH
H--4
4 o
op
pe
erra
attiio
on
n
➀
Set the desired frequency in an HF band.
• The AH-4 will not operate on frequencies outside of ham
bands.
➁
Push and hold [TUNER] for 2 sec.
• The [TUNER] light flashes and “CW” appears while tun-
ing.
➂
The [TUNER] light lights constantly when tuning is
complete.
complete.
• When the connected wire cannot be tuned, the
[TUNER] light goes out, the AH-4 is bypassed and the
antenna wire is connected to the antenna connector on
the transceiver directly.
antenna wire is connected to the antenna connector on
the transceiver directly.
➃
To bypass the AH-4 manually, push [TUNER].
• P
PT
TT
T ttu
un
ne
e ffu
un
nc
cttiio
on
n
The AH-4 is always tuned when the PTT is pushed
after the frequency is changed (more than 1%). This
function removes the “push and hold [TUNER]”
operation and activates first transmission on the new
frequency. This function is turned ON in initial set
mode, item 13 (p. 54).
after the frequency is changed (more than 1%). This
function removes the “push and hold [TUNER]”
operation and activates first transmission on the new
frequency. This function is turned ON in initial set
mode, item 13 (p. 54).
D O
Op
pttiio
on
na
all A
AH
H--4
4
A
AU
UT
TO
OM
MA
AT
TIIC
C A
AN
NT
TE
EN
NN
NA
A T
TU
UN
NE
ER
R
o
op
pe
erra
attiio
on
n
AH-4 setting example:
For mobile operation
For outdoor operation
Long wire
Optional AH-2b
antenna element
antenna element
RW
WA
AR
RN
NIIN
NG
G:: H
HIIG
GH
H V
VO
OL
LT
TA
AG
GE
E!!
N
NE
EV
VE
ER
R touch the antenna element while tuning
or transmitting.
Tuning is required for each frequency. B
Be
e s
su
urre
e to
re-tune the antenna before transmitting when you
change the frequency—even slightly.
change the frequency—even slightly.
USB
CW
Push [TUNER] for 2 sec.
CONVENIENT
IC-706MKIIG.qxd 02.3.27 13:53 Page 28