[Elecraft] Elecraft Digest, Vol 190, Issue 16

[Jim Brown]

On 2/21/2020 9:17 AM, Andreas Wachter via Elecraft wrote:
> Also, the RFI is 24x7 so if it were caused by my neighbors’ plasma TVs, there shouldn’t be any RFI at, say, 3AM in the morning.

Andreas,

For at least ten years, almost anything we buy that plugs into the wall 
has an SMPS that generates noise as long as it's connected. This 
includes everything from computers to TVs to home entertainment systems 
to battery chargers to the inverters for solar systems. My closest 
neighbors are at distances about like yours, and I get noise from them. 
Some of it cycles on and off, some is constant. There's power line 
noise, which can be constant or not.

Like the technically illiterate folks who live near me who believe that 
cell towers cause cancer and who campaign against the addition of cell 
sites that can provide us service, you've made up your mind without 
knowledge of the underlying science.

I've sent you a link to a tutorial that provide detailed advice about 
figuring out what kind of noise source(s) you have, how to track them 
down, and how to kill them. I repeat my advice to study it.

http://k9yc.com/KillingReceiveNoise.pdf

73, Jim K9YC