Well guys, we¡¯ve cracked it, with all your help and suggestions.
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The culprit was indeed the filter electrolytic C2061 connected to VCC on Mo2002 VCO. It had gone short circuit. I reckon that had dragged down the switching pair Q2016 which in turn had failed.
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Anyway, I¡¯ve managed to work John on 2mtrs across the shack..... it¡¯ll never be a candidate for the million-miles-per-watt award but we are dead happy.
Hi Charles, thanks for that, well I hope you are right, I certainly don¡¯t want to try and source that VCO. I¡¯m going to try and find time tomorrow to check that out, its an easy smd part to remove so it should be a quick check. I¡¯ll let you know.