When I posted on this issue to another list, W3LPL responded that it's
fairly common for harmonics with this sort of characteristic to be
generated in active electronics like switching power supplies. Sort of
identifying which is the culprit and choking every cable connected to
it, there's no solution.
73, Jim K9YC
On Mon,2/22/2016 8:34 PM, paulb wrote:
For what ever reason the harmonic is still very present..darn..
oddly has a rasping note not pure carrier.
A close ham about 400 meters away can also hear the 2nd hamonnic,
band pass in or out makes little change.
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