[RFI] What was that noise?

[N4ZR]

Jim, the Ryobi charger lacks a wallwart, so that option's out.  The 
Black and Decker unit has a wart, but its output is an odd 8.5 VDC.  In 
any case, I can live with only plugging them in when I need them.

At least I've found the source of the paralyzing noise that made SSB 
very unpleasant when I pointed my beam West (toward the house), just in 
time for FD.

73, Pete N4ZR
Check out the new Reverse Beacon Network
web server at <http://beta.reversebeacon.net>.
For spots, please use your favorite
"retail" DX cluster.

On 6/24/2021 2:20 PM, Jim Brown wrote:
> 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
> _______________________________________________
> RFI mailing list
> RFI at contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi