[RFI] DFing intermittent connection

Jim Brown jim at audiosystemsgroup.com
Wed Aug 11 14:35:31 EDT 2021


On 8/11/2021 11:26 AM, Steve London wrote:
> It's nice to
> have a name for this: PIM (passive intermod).

W3LPL was the first to alert me to this mechanism as a cause of 
harmonics, with rotators as a common place on towers where it occurs. 
The fix is to bond around it. He also observed that it commonly occurs 
in an SMPS, which could be anywhere. The fix is to search and destroy. :)

73, Jim K9YC


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