Sony STR-D615 Operating Instructions Manual page 6

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higher quality sound will be obtained with 75-ohm coaxial
cable. (not supplied)
For best reception:
For U.S.A. and Canada models
300-ohm twin-lead (not supplied)
75-ohm coaxial cable (not supplied)
For U.K and Australian models
75-ohm coaxial cable (not supplied)
When not using outdoor antenna:
For U.S.A. and Canada models
Supplied wire antenna
For U.K and Australian models
Supplied wire antenna
6
1o prevent hum, connect the ground wire It>the AN I ENNA
ground terminal (_0).
When an outdoor antenna is installed, be sure to connect the
ground wire for lightning protection.
The AM reception is adequate with the supplied AM loop
antenna. However, the connection of insulated wire is also
available for areas with difficult AM reception.
Models for U.S.A, and Canada
_> Adjust the
I_- direction.
Supplied loop
antenna
Models for U.K. and Australia
_. >.._ Adjust the
_ direction.
Supplied loop
antenna
AM antenna extension
For best reception, attach a length of insulated wire (6 - 15 m
long) to the AM screw connector in addition to the loop
antenna.