Labels:book | chat room | reckoner | sky OCR: KENWOOD SB-948 SERVICE BULLETIN AMATEUR RADIO SUBJECT DATE TS-440S NOTCH FILTER LOW FREQUENCY IMPROVEMENTS 01/20/89 The low frequency attenuati ion characteristi ics of the notch filter can be improved by reduc 6ut the input level to the notch filter chip To compensate for the loss of input level the amount nega feedback to the audi IC7 will need to be reduced Ths modi f4 icat Lon already ted models beg nn ing with serial number 704XXXX REQUIRED PARTS 390 120K OHM WHO WATT WATT RES RESISTOR ISTOR ... RD1 RD14CB2C391J 4CB2C124J Disconnect the power supply and antenna Using Ph illips screw driver remove the screws from the top cover Remove the top cover from the transce iver and unplug the speaker wire Locate istors R86 and R229 on the component side of the IF board (Figure Using Phillips sc ...
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