Page 8
F
T
DX
1200 O
PERATING
M
ANUAL
A
NTENNA
C
ONSIDERATIONS
The
FT
DX
1200
is designed for use with any antenna system providing a
0
2
hm resistive impedance at the desired op-
erating fre
T
uency. While minor excursions from the
0-
2
hm speci
¿
cation are of no conse
T
uence, if the Standing Wave
5
atio
SW
5
) present at the
$
ntenna jack is greater than 3
1, the transceiver
¶
s
$
utomatic
$
ntenna Tuner may not be able
to reduce the impedance mismatch to an acceptable value.
(
very effort should be made to ensure that the impedance of the antenna system be as close as possible to the speci
¿
ed
0-
2
hm value.
1
ote that the “G
5
V” type antenna does not provide a
0-
2
hm impedance on all HF
$
mateur bands.
$
n
external wide-range antenna coupler must be used with this antenna type.
$
ny antenna to be used with the
FT
DX
1200
must be fed from the transceiver with
0
2
hm coaxial cable. Therefore,
when using a “balanced” antenna such as a dipole, remember that a balun or other matching
balancing device must be
used to ensure proper antenna performance.
The same precautions apply to any additional
receive-only) antennas connected to the antenna jacks. if your receive-
only antennas do not have impedance near
0
2
hms at the operating fre
T
uency, you may need to install an external an-
tenna tuner to obtain optimum performance.
A
BOUT
C
OAXIAL
C
ABLE
Use high-
T
uality
0-
2
hm coaxial cable for the lead-in to your
FT
DX
1200
transceiver.
$
ll efforts at providing an ef-
¿
cient antenna system will be wasted if poor
T
uality, lossy coaxial cable is used. This transceiver utili
]
es standard “
0
”
“
3
L-
”) type connectors.
I
NSTALLATION
AND
I
NTERCONNECTIONS
T
YPICAL
PL-259 I
NSTALLATION
