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OCR: KENWOOD 898* SERVICE BULLETIN AMATEUR RADIO STBJECT DATE -9305 LOW RX Sensitivity 83 loss of receiver sensi tivity 6-30ab may be caused by shorted tch ng in the 5ignal Unit X57-1 000 -XX> The following procedure will incrcasc the capabi. lity of the unit to thstand h ch RF tage levels PROCEDURE Signal Unit X57-1000- (XX- Repl .ace Signal unit upe J27 with an XZ- -070 zener diode coordinate c-1 aee fiqure 9 Jumper J27 zda Zener XZ- 70 Figure ICUIE Change diodes STO throtgh D33 from BA282 to 12588 Change only the de fective diode when making the repaiT Fiqure shows circuit that capable of thstanding an tenna input levels to 50 Wat Use thi on uni t that may be suhject to ieve of RF Thi opt: onal change that may not be aone warranty 047 mf 30 disc 1mh 12. 014 15754 TLE Fiqure *Note Installatio ...