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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 # 10
MODEL: TR-7400A
SUBJECT: ARCING IN FINAL SECTION
         
                                                            
   There may be some cases of arcing to ground beneath coil L-6
   at the collector of Q-2 (2N6083) inside the final unit X45-1090-10.

   This is due to minute differences in the circuit board trace 
   dimensions and a residue of flux on the board.

   
   If this should occur, remove L-6 and clean all traces of carbon
   and flux from the circuit board. Resolder the edges of the traces
   and remove any flux left from soldering. Modify L-6 so that it will
   stand off the pc board.
                                           
   Reinstall L-6 and check for rated output.
   A slight retuning of TC-4 may be required.