14 FT-857 Operating Manual
Do not allow disconnected cables to touch the case of your FT-857 transceiver or accesso-
ries, as lightning can easily jump from the cable to the circuitry of your transceiver via the
case, causing irreparable damage. If a lightning storm is in progress in your immediate area,
do not attempt to disconnect the cables, as you could be killed instantly if lightning should
strike your antenna structure or a nearby power line.
If a vertical antenna is utilized, be certain that humans and/or pets and farm animals are kept
away both from the radiating element (to prevent electrical shock and RF exposure danger)
and the ground system (in the event of an electrical storm). The buried radials of a ground-
mounted vertical antenna can carry lethal voltages outward from the center of the antenna in
the event of a direct lightning strike.
RF FIELD EXPOSURE
This transceiver is capable of power output in excess of 50 Watts, so customers in the United
States may be required to demonstrate compliance with Federal Communications Commis-
sion (FCC) regulations concerning maximum permissible exposure to radio frequency en-
ergy. Compliance is based on the actual power output used, feedline loss, antenna type and
height, and other factors which can only be evaluated as a system.
Information regarding these regulations may be available from your Dealer, your local radio
club, from the FCC directly (press releases and other information can be found on the FCC’s
site on the World Wide Web at <http://www.fcc.gov>), or from the American Radio Relay
League, Inc. (225 Main St., Newington CT 06111 or <http://www.arrl.org>).
Although there is negligible radio frequency (RF) leakage from the FT-857 transceiver
itself, its antenna system should be located as far away from humans and animals as practi-
cable, so as to avoid the possibility of shock due to accidental contact with the antenna or
excessive long-term exposure to RF energy. During mobile operation, do not transmit if
someone is standing adjacent to your antenna, and use the lowest power possible.
Never stand in front of an antenna (during testing or operation) when RF power is applied,
especially in the case of 430 MHz directional arrays. The 20 Watt power output supplied by
the FT-857, combined with the directivity of a beam antenna, can cause immediate heating
of human or animal tissues, and may cause other undesirable medical effects.
ANTENNA CONSIDERATIONS
INSTALLATION
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