Hi Steve,
If any phones in his home have extension cables they are likely using
parallel wires, not twisted pair. Replacing such extensions with quality
UTP cable goes a long way toward curing this type of RFI. Also, many
houses have phone wiring that is effectively a big loop, so that an
outlet can be installed easily at any point along the loop. Problem is
it makes a very nice antenna. Often just opening the loop at a
convenient point works, but there are "loop buster" L/C circuits sold
commercially that can be inserted in the loop to block or at least
reduce the RFI susceptibility while maintaining the installed loop
condition.
Gus Hansen
KB0YH
On 11/19/2017 6:39 AM, Steve London wrote:
I am working with another ham to solve his unusual RFI issue.
He uses Comcast for internet, TV and phones. When he is on 80 meters,
it rings the phones in his house.
He hasn't tried anything, yet, to cure the problem.
Suggestions ?
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