599 / Eagle Users manual Release 1.009 CE – April 15, 2015
Part #74447
Printed in USA 4
1.4. Connection to Antenna &
Power Supply
The Eagle 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 and
some Windom’s do not provide 50-Ohm
impedance on all HF Amateur bands, and an
external wide-range antenna coupler or the
optional model AT599K Eagle internal auto
tuner may be needed with this type antenna.
Any antenna to be used with the Eagle must,
ultimately, be fed with 50 Ohm coaxial cable.
The Eagle transceiver requires a source of
well-filtered and regulated DC voltage. The
supply voltage on the Eagle is 13.8 Vdc
nominal +/- 15% to allow for mobile and
battery operation. The voltage source must
be capable of supplying 23 amperes
continuous duty. The model 940 or 941 Ten-
Tec power supplies will meet or exceed your
voltage and current requirements. We
recommend using the included DC power
cable (P/N 46214). Use of #12 stranded wire
is recommended for mobile and in home use
to accommodate the required current demand
during transmit.
Note: Always enable the power source first
and then the transceiver. If a generator or
battery connected to a charger is used to
supply the DC source, always turn off the
transceiver before starting or shutting off the
DC source equipment. These recharging
devices often generate large voltage spikes
that can damage the transceiver.
1.5. A word about grounding
A good ground system is essential for
optimum operation of any HF transmitter.
The best solution is to connect all the station
equipment to a single ground connection.
Refer to Local and National Electrical Codes
before making any connections with the
Eagle. Another source of information on
grounding can be found in the ARRL
Handbook.
A good ground system can contribute to the
station efficiency in a number of ways
including minimizing the possibility of
electrical shock, and minimizing RF currents
flowing on the shield of the coax cable
causing interference to electrical equipment
and transceiver accessories.
It is critical that the power supply, the Eagle,
and other equipment in the station be properly
grounded to an Earth ground. Improper
grounding can lead to various issues,
including RFI, ground loops, or even death.
Therefore it is extremely important to refer to
the Local and National Electrical Codes and
ARRL Handbook with regards to grounding.
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