Antenna Considerations; About Coaxial Cable - Yaesu FT-2000 Operating Manual

I
NSTALLATION AND
The FT-2000D is designed for use with any antenna system providing a 50 Ohm resistive impedance at the desired oper-
ating frequency. While minor excursions from the 50-Ohm specification are of no consequence, the transceiver's Auto-
matic Antenna Tuner may not be able to reduce the impedance mismatch to an acceptable value if the Standing Wave Ratio
(SWR) present at the Antenna jack is greater than 3:1.
Every effort should, therefore, be made to ensure that the impedance of the antenna system utilized with the FT-2000D be
as close as possible to the specified 50-Ohm value.
Note that the "G5RV" type antenna does not provide a 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-2000D 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 so as to
ensure proper antenna performance.
The same precautions apply to any additional (receive-only) antennas connected to the RX ANT jack; if your receive-only
antennas do not have an impedance near 50 Ohms at the operating frequency, you may need to install an external antenna
tuner to obtain optimum performance.
Use high-quality 50-Ohm coaxial cable for the lead-in to your FT-2000D transceiver. All efforts at providing an efficient
antenna system will be wasted if poor quality, lossy coaxial cable is used. This transceiver utilizes standard "M" ("PL-259")
type connectors, except for the "RX OUT" BNC connector.
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NTERCONNECTIONS
A C
NTENNA ONSIDERATIONS
A C
BOUT OAXIAL
1/16''
3/4''
1 1/8''
T PL-259 I
C
ABLE
Adapter
FT-2000D O
3/4''
1/8''
3/8'' 5/8''
M