[RFI] What was that noise?

[Jim Brown]

On 6/24/2021 9:30 AM, N4ZR wrote:
> For what it might be worth in terms of "where to look", I discovered 
> today that my Ryobi 18v hand drill charger and the charger for an older 
> Black and Decker electric screwdriver were both generating wideband noise.

It should be assumed that ALL chargers, wall warts, and anything that 
plugs into the wall that we've bought in the last 15 years WILL generate 
noise. Wall warts and line lumps can be replaced by old technology 
linear power supplies, which produce no RFI.

Study http://k9yc.com/KillingReceiveNoise.pdf for methods.

73, Jim K9YC