Labels:book | earth | monitor | poster | reckoner | sky OCR: KENWOOD SB- 957 SERVICE BULLETIN AMATEUR RADIO SUBECT DATE -HL 75A NO XI NO VHF USING VEHICLE BATTERY SUPPL 06/60 When the -HL -75A is connected to vehicle battery ignition or alterna tor ou ise can be induced on the DC line When the transceiver in the automa tic ba ttery saver mode the noi se pulses overcharge C348 on the RF board caus inc it to short The supply current opens L218 and the foil trace at this coil To protect the transce iver Zener di iode will be used to amp the SBR line The Zener should be soldered between the SBR side of L218 and the shielding case of L221 on the component side of the RF board X53-3370 -11 A/3 The Serv ice Manual disassembly instructi ons will be required perform this modification. NOTE This mod icati ion has already been per formed to models starting wit ...
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