Labels:book | reckoner | sky OCR: KENWOOD ASB- 1004 Service Bulletin Amateur Radio Division Subject: TS- 450S TX Frequency Response Date: December 21 1992 We have received several reports concerning the transmit audio quality of this unit Several reporters noted that the signal sounded "hard" or had reduced bandwidth while others noted difference in the noise quality when switching between USB and LSB We noticed sigmificant difference between the output power in LSB and USB on some of these sets Cause: Improper adiustment of the 8.83 MHz tuning coils (L73 L76 on the RF Unit (X44 -3130- 00 can cause these symptoms The coils have two tuning points One reached when the tuning slug projects above the surface of the coil form. When tuned in this manner the bandwidth becomes narrower than normal and causes the svmptoms noted abo ...
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