Labels:book | bulletin board | monitor | reckoner | sky OCR: KENWOOD SB-938 SERVICE BULLETIN AMATEUR RADIO SUBECT DATE PS-430 VOLTAGE INCREASE WITH TH-205/215 6/02/88 When the PS-430 is used as an external D power supply for the -HL 205 215 the output voltage increase approx imately 20V due to RF feedback This cond iti ion is restr icted to ope rat ing in the high power mode ti the raans ied hel ical antenna Add ing by pass capaci tor between the base and emi itter Q2 on the AVR board the PS-430 will correct this occurrence REOUIRED PART 1000pF 50V capacitor PART CK45B1H102K Remove power from the PS-430 Remove the top cover of the power supply (10 screws) Locate trans .stor on the upper left hand side of the AVR board X43-1440-00) The transistor and thermistor TH1 are covered with piece ink tubing keep them close contact with one anothe Remove the s ...
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