[RFI] DSL INTERFERENCE FROM 160 METERS

[Jim Brown]

On Tue, 6 Feb 2007 17:15:56 -0800 (PST), Commander John wrote:

> How do I protect my modem from the RF. 

14 turns of the phone cable around a Fair-Rite #31 2.4" o.d. toroid 
(the shape commonly called FT-240) makes a very effective common 
mode choke at 2 MHz. 

For more details, see the tutorial on my website.

http://audiosystemsgroup.com/RFI-Ham.pdf

73,

Jim Brown K9YC