Labels:book | reckoner | sky OCR: KENWOOD ASB- 1056 Service Bulletin Amateur Radio Division Subject: TM- 732AVE APC Circuit Improvement Date: March 28 1994 Symptom: Failures of APC circuit transistor Q232 can occasionally be attributed to the gain dispersion characteristics of the VHF power module Some of these devices allow transmit power even with reduced DB terminal voltages II the unit is then operated for extended transmit key down periods Q232 can overheat ano fail Corrective Action: Measure the transmit output and the "DB" terminal voltage dial frequency 145 .020 MHz Add the dB circuit if the transmitter poweris 60W or greater and the DB terminal voltage is10 vdc or less After the attenuator re adjust the transmitter output power for50 W and check the "DB" voltage The "DB voltage should now fall between 10 and 11 vd ...
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