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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 # 858
MODEL: TR-2500
SUBJECT: RX IMD Improvement
RX intermodulation distortion may be improved by reducing second
conversion oscillator harmonic content and level. No adjustments are
required. This may be applied to a unit specifically exhibiting out-of-band
intermodulation distortion. It is, however, not a general improvement.
On the TX RX unit X44-1460-xx, perform the following changes;
R55 47k delete
C73 47pf to 33pf (CC45SLlH330J)
C74 100Pf 150Pf (CC45SLlH151J)
Add a shield between Q1, (R3,C5)and C73 (from L1 to near X1).
These changes are at the owners option, and may not be installed in-warranty.
NOTE: The information presented is complete and accurate to the best of
our knowledge. However, Trio-Kenwood Communications assumes no liability
either for your work, or for consequential damage resulting from your work.