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Kenwood TS570 swr circuit issue


 

Picked up a used TS570SG recently.? It is a nice radio overall.? However, the SWR circuit doesn't seem to be working correctly.? It never shows higher than a 1.5 SWR, even with no load connected.? And it doesn't agree with an external meter I? have.? Consequently the SWR/Power foldback circuit never really gets activated. I tried a full reset on it and it still does the same thing.
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Ideas?? Anyone seen this before?
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73 John AF5CC
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