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
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