Kenwood KR-A57R Instruction Manual page 8

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Vary the direction of
the loop antenna.
Keep the speaker leads
and AC cord away from
the AM
loop antenna.
Note:
Do not place the AM loop antenna on the unit. As this unit employs
computing device, placing the AM loop antenna on the unit may
result in noise generation. Place the AM loop antenna away from
the unit.
AM outdoor antenna
In steel buildings or at a great distance from the transmitter,
it may be necessary to install an outside long wire antenna.
The end of this wire should be stripped of insulation and
connected to the AM terminal. At this time, keep the loop
antenna connected.
FM antennas
Your unit approaches the theoretical limit in FM sensitivity.
However, the performance of your system is determined
to a very large extent upon the signal conditions where the
antenna is placed. The reason is that FM broadcast signals
travel in straight paths. Therefore they can be blocked by
natural Or man-made obstructions such as mountains, hills,
or buildings. At large distances from the transmitter the
curvature of the earth acts as a screen between transmitter
and receiver.
Consider the signal conditions in planning your installation.
If you
live in or near an urban area the indoor antenna
(supplied) may serve your needs adequately.
However,
if desired
stations
are
weak
due
to natural
obstructions, or if you live in a building which is made of
steelreinforced concrete (which acts as a shield) it may be
necessary to install a good outdoor antenna.
FM
outdoor antenna
Consult with your dealer or service man about the best
method of selecting and eracting an outdoor FM antenna.
The choice of lead-in (feeder) wire is also important. The
flat ribbon-shapped twin lead performs well electrically, is
cheaper and is somewhat easier to handle routing through
windows and around rooms. Coaxial cable is more expen-
sive, doesa much better job of minimizing interference, is
less prone to the effects of weather and close-by metal
objects, and is nearly as good a signal conductor as the
ribbon type wire. The latter is particularly true of foam-type
coaxial cables. Coaxial cable is somewhat more difficult to
install at the point where the cable enters the building. If
coaxial
cable is selected,
make
sure the antenna
is de-
signed to drive that type of cable.
8
KRASIR {K)
@ To minimize auto-ignition noise, locate the antenna as far from heavy
traffic as possible.
@ Keep the feeder or coaxial cable as short as possible. Do not bundle
or roll up excess cable.
@ The antenna should be at feast two meters (6.6 feet) from reinforced
concrete walls, or metal structures.
FM outdoor antenna setting
FM indoor antenna
Connect the T-shapped indoor antenna (supplied) to the
300 ohm FM ANTENNA terminal as shown in the system
connections diagram. Spread the two arms that form the
top of the "T" horizontally and hold them against conven-
ient wall surfaces. Try several locations for best results on
your desired stations. Tape the antenna in place where the
best compromise
is found between
listening results and
appearance.
AC outlets (SWITCHED
outlets)
The AC outlets on the rear panel of the unit may be used
to supply power to other components in the system, such
as turntables, tape decks, etc. Never connect equipment
whose power consumption exceeds the maximum
value.
The maximum
total capacity is 600 watts.
FM DE-EMPHASIS
switch
(Exept for some areas}
This switch has been set to the correct position for a given
market area. However, check to see that this switch is set
correctly before operating your unit. An incorrect setting
will adversely affect high-frequency performance.
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