[RFI] 40 meter RFI

Dave Hachadorian K6LL at ARRL.net
Wed Dec 5 12:08:24 EST 2007

> All the lights trigger at the
> same time throughout the house which makes me suspect it 
> is the
> transmitter which is stimulated as opposed to the 
> receivers but this
> is of course just a guess.

That's more than a guess. It sounds like hard evidence to 
me. Try disconnecting the button wires from the transmitter 
to see if it still triggers with RF. If it still triggers, 
the rf is coming on the ac line. If it doesn't trigger, the 
button wires are the culprit. The button wires would be my 
guess. If it is the button wires, insert an effective toroid 
choke in the button wires near the unit, and add a .15 
microfarad ceramic capacitor with short leads across the 
button wire terminals on the transmitter unit.

Dave Hachadorian, K6LL
Yuma, AZ 

More information about the RFI mailing list