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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   <<<
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                        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

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BULLETIN # 58
MODEL: TR-2400
SUBJECT: TONE ENCODER RFI

In some cases, users may report RF interference, or motor-boating, when
using a tone encoder in their TR-2400.  A secondary complaint of excessive
tone level may also be encountered.

1.   For RFI, bypass the B+ terminal to ground with a 100 uf cap.

2.   For excessive tone input to the TR-2400, install a 100 K ohm resistor
between the encoder and the TR-2400 Tone input terminal.