jpsa wrote:This may be a never-ending quest! Perhaps the best fix will be to move the antenna to the other end of the house from all this electronics, and run quality coax from there.
Thanks for your interesting remarks about locally generated interference.
One of the antenna I am using is a CA2X4max collinear for 2m and 70cm.
It is in a cherry tree about 12m above ground and 10m from the house.
The funny thing is that in the amateur bands it is designed for I have very little birdies .
When using it on other frequencies it is different.
I assume that it is because my house then falls into the distorted vertical radiation pattern.