[RFI] update <was> 40m (and other) noise

Jim Brown jim at audiosystemsgroup.com
Sat Apr 11 13:28:21 PDT 2009

On Sat, 11 Apr 2009 14:02:55 -0500, Sam Morgan wrote:

>snapon toroid did *NOT* fix it,

Of course not. No reason why it should. For 30M, a multi-
turn choke on #31 or #43 material is needed. Study 


Over the past few months, I've been gradually adding power 
line filters to nearly everyting that's plugged in to the 
power line, and my noise level has been gradually dropping. 

Power line filters are widely available, sometimes on the 
surplus market for only a few bucks. Check out 



Jim Brown K9YC

More information about the RFI mailing list