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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 # 834
MODEL: TR-7800
SUBJECT: PULSE NOISE
Low level Pulse Noise reported in high power TX, or as a buzz
from the speaker during TX, may be reduced or eliminated by
the following steps.
1. If not already present, install a shield (F11-0781-04) and
two 1000pF capacitors (C52=1710-26) at the final amplifier
module M57733.
2. On the RX unit X55-1270-10 add three additional 1000pF caps
(C52-1710-26) and one additional 470pF cap (C52-1747-16) to
pins 6,7,and 3 of Q3 to ground.
lnstallatlon time for this procedure is approximately 1/2 hour.