[TenTec] The REAL Cause of RFI

[Richards]

There are two RFI problem at my house ...  a set of computer speakers my 
wife uses on a TV upstairs likes a couple of 20 meter frequencies.   And 
a couple of frequencies on 40 meters turns on just one sector of my 
underground sprinkling system.   Out by the mail box.   Only runs when I 
transmit...

Coiling the speaker cables seems to have changed them from being 
antennas, but the sprinkler system is still an enigma.  I am still 
working that.

===================== K8JHR  ================================

On 8/11/2010 9:47 PM, Jim Brown K9YC wrote:

> THAT'S why ferrite common mode chokes fixes the RFI -- it kills the
> RF current on the cable, which prevents it from exciting the pin 1
> problem. In fact, if it were a SHIELDING problem, the choke would not
> help.

> _______________________________________________