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                             K E N W O O D
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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 # 14
MODEL: TS-820
SUBJECT: MICROPHONE INPUT ATTENUATION
         
    When using a high output microphone (i.e. Shure 444), it is
    very likely that there will be distortion of the transmitted
    audio if the processor is used. The reason the distortion occurs
    is because the processor is between the first microphone amplifier
    and the microphone gain control. The installation of one of the
    attenuators shown below will reduce the microphone input to a
    level that will not cause RF speech processor distortion. The
    attenuator figures are approximate.
    

                 10DB                              16DB

         A ------47K------ B               A ------100 K------ B
             |         |                       |           |
             |         |                       |           |
            100K     100K                     56K         56K
             |         |                       |           |
             |         |                       |           |
             -----------                        ------------
                  |                                   |
                 GND                                 GND