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World of Ham Radio 1997
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==============================================================================
K E N W O O D
>>> A M A T E U R R A D I O S E R V I C E B U L L E T I N <<<
==============================================================================
Kenwood Service Centers
Kenwood Service Corporation Kenwood Service Center, East
2201 East Dominguez Street 829 Lynnhaven Parkway, Suite 130
Long Beach, California 90801 Virginia Beach, Virginia 23452
Telephone 1-310-639-5300 Telephone 1-804-340-1702
==============================================================================
BULLETIN # 857
MODEL: TS-830S
SUBJECT: TS-830S Transmitter "Talkback"
Transmitter "talkback", either with or without a linear amplifier, may
be eliminated by adding a filter at the receiver audio power amplifier.
On the AF unit X49-1140-00 at Q4, cut the 12V DC B+ line between R47 and
C28, and add a luh choke (L40-1092-02) in-line. Add a .01pF cap (C52-1710-36)
from the IC pin 1 to ground, using a 3mm lug (E23-0015-04) under the
IC mounting screw on the Heat Sink.
Note: Installation time for this procedure is 1/2 hour or less.