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Yaesu FTDX-3000 Manual

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Page 8
F
T
DX
30
00 OperaTing Manual
AntennA conSiderAtionS
The
FT
DX
3000
is designed for use with any antenna system providing a 50 Ohm resistive impedance at the desired op-
erating frequency. While minor excursions from the 50-Ohm specication are of no consequence, if the Standing Wave
Ratio (SWR) present at the Antenna jack is greater than 3:1, the transceiver’s Automatic Antenna Tuner may not be able
to reduce the impedance mismatch to an acceptable value.
Every effort should be made to ensure that the impedance of the antenna system be as close as possible to the specied
50-Ohm value. Note that the “G5RV” type antenna does not provide a 50-Ohm impedance on all HF Amateur bands. An
external wide-range antenna coupler must be used with this antenna type.
Any antenna to be used with the
FT
DX
3000
must be fed from the transceiver 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.
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 50 Ohms at the operating frequency, you may need to install an external an-
tenna tuner to obtain optimum performance.
About coAxiAl cAble
Use high-quality 50-Ohm coaxial cable for the lead-in to your
FT
DX
3000
transceiver. All efforts at providing an ef-
cient antenna system will be wasted if poor quality, lossy coaxial cable is used. This transceiver utilizes standard “M”
(“PL-259”) type connectors.
installation anD interconnections
typicAl pl-259 inStAllAtion
… 10 …


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  • Is the Yaesu FTDX3000 internally protected from supply over voltage, please? Submitted on 23-5-2021 at 01:56

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