You more likely need a common mode choke on the feed line close to the
radio. Perhaps where the feed line enters the house. A common mode
choke can be also known as "The Ugly Balun"
http://www.hamuniverse.com/balun.html or can be a series of ferrite
beads on a section of coax.
Also see Model # 8232 found on The Wireman website.
https://thewireman.com/prodpix2.html <https://thewireman.com/prodpix2.html>
73
Bob, K4TAX
On 11/22/2015 5:02 PM, Jan Ditzian wrote:
I have a problem that appears to be changing, but I could use some
help. The problem is RFI in the audio input (microphone input) when I
use my vertical antenna on 40 meters. Here is a rundown of what has
happened:
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