Thanks, Ludwig! Appreciate your input!
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Somewhere? on this forum and on this topic of PCM1804 failures is a voltage check on pin pairs of the 1804. I saw it, read it and thought I could find it...but...
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I think it was different? pairs would see about 2.5 vdc on certain bands..where was that? I will delay replacing the IC407/PCM1804 until this simple test is passed.
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By the way, my 1804 looks like authentic Texas Instruments logo but then a fake would, too.
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73
Karl
KI4ZUQ
Karl