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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 # 45
MODEL: TR-7600/TR-7625
SUBJECT: AUDIO HUM ON TRANSMIT

Some TR-7600/7625 users report a low background tone during TX, especially
noticable at full quieting by the receiving station.

On the PLL unit X50-1580-00, change:

     L18 from 22 uH to 33 uH
     C61 from 22 pF to 33 pF
     C60 from 22 pF to 10 pF
     C42 from 22 pF to 39 pF, or bridge 18pf across foil side and leave 
     original C42 in place.  No adjustment is necessary.

New part:
          L18 33uH L40-3301-03

Please annotate your service manual.