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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 # 906
MODEL: TM-2570A
SUBJECT: Low TX Power Output


Some owners of the TM-2570 have reportecd low transmitter power when the
radio is used with an antenna having reasonably low VSWR (1.5:1)

Procedure:
1.   Remove the bottom cover on the heat sink.
2.   Ensure that C72 is installed correctly.  (Refer to Service Manual)
3.   Squeeze the coils of L16 closer together.
4.   Make sure that C72 and L14 are as far away from each other as
     possible, move the capacitor, not the inductor.
5.   Readjust VR1-VR4, according to the instructions provided in the
     Service Manual.  The protection circuit, VR4, should be adjusted for 
     8A at 146.000 Mhz rather than the values indicated in the Service 
     manual.  Change your service manual to reflect this value.
6.   Replace the bottom cover to complete the procedure.

Time required for this modification is 1/2 hour or less.