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World of Ham Radio 1997
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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 <<<
==============================================================================
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
==============================================================================
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.