[RFI] Sprinkler Controller

rick darwicki n6pe at yahoo.com
Wed Mar 5 13:46:40 EST 2008

As some additional notes........ I'm an old tube guy and grew up getting rid of TVI/RFI mostly with bypass capacitors.

My sprinkler controller would set off certtain zones depending on band and power level. 

I installed various ferrite beads on each wire coming in and on the power wires. At first I thought it was fixed, but I still had problems on certain bands, probably due to wire length.

In my junk box a found a bunch of .47ufd 400v mylar capacitors, I bypassed each input to a common ground.

Problem solved.

Rick, N6PE

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