Specifications

14 FT-857D Operating Manual
Do not allow disconnected cables to touch the case of your FT-857D transceiver or acces-
sories, 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
Commission (FCC) regulations concerning maximum permissible exposure to radio fre-
quency energy. 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-857D 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-857D, combined with the directivity of a beam antenna, can cause immediate heat-
ing of human or animal tissues, and may cause other undesirable medical effects.
ANTENNA CONSIDERATIONS
INSTALLATION