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Page 11FT-450D OPERATION MANUAL
I
NSTALLATION
CONNECTION OF ANTENNA AND POWER SUPPLY
The FT-450D is designed for use with any antenna system providing a 50 Ohm resistive impedance at the
desired operating frequency. Every effort should be made to ensure the impedance of the antenna system is as
close as possible to the specified 50-Ohm value. Note that the “G5RV” type antenna does not provide 50-Ohm
impedance on all HF Amateur bands, and an external wide-range antenna coupler must be used with this
antenna type.
Any antenna to be used with the FT-450D must, ultimately, be fed with 50 Ohm 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.
AC Power Supply
FT-450D
CAUTION
Permanent damage can result if improper supply
voltage, or reverse-polarity voltage, is applied to
the FT-450D. The Limited Warranty on this trans-
ceiver does not cover damage caused by applica-
tion of AC voltage, reversed polarity DC, or DC volt-
age outside the specified range of 13.8V ±10%.
When replacing fuses, be certain to use a fuse of
the proper rating. The FT-450D requires a 25A fast-
blow fuse.
INPUT
DC 13.8 V
22 A
ANT
GND
EXT
SPKR
CATLINEARTUNERDATA
A
0 5 20 30 40
POWER
ON
OFF
RED BLACK
FUSE: 25A
V
0 5 10 15 20
Warning!
The 100V RF voltage (@100 W/50
) is applied to the TX RF section
of the transciver while transmitting.
Do not touch the TX RF section ab-
solutely while transmitting.
CAUTION
Do not position this apparatus in a location with direct exposure to sunshine.
Do not position this apparatus in a location exposed to dust and/or high humidity.
Do not expose the apparatus to dripping or splashing. Do not put objects with liquids on the apparatus.
Ensure adequate ventilation around this apparatus, so as to prevent heat build-up and possible reduc-
tion of performance due to high heat.
Do not install this apparatus in a mechanically-unstable location, or where objects may fall onto this
product from above.
To minimize the possibility of interference to home entertainment devices, take all precautionary steps
including separation of TV/FM antennas from Amateur transmitting antennas to the greatest extent
possible, and keep transmitting coaxial cables separated from cables connected to home entertain-
ment devices.
Be absolutely certain to install your transmitting antenna(s) such that they cannot possibly come in
contact with TV/FM radio or other antennas, nor with outside power or telephone lines.
13


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