Topband: RF interference from 160m to GE Electric stove

[Bob Lawson N6RW]

Jay

If you use snap-on ferrites, make sure they are #31 mix.  31 mix is 
substantially better than others (like 47 mix) at 160m.  When I had a 
vertical on the roof at my So Cal house, I would reset my DirecTV HD 
receivers, trigger my home security alarm, turn off my air conditioning 
fan and so on, when I transmitted on 80 meters. All problems were solved 
with 31 mix ferrites.

73 de Bob N6RW


On 11/6/2016 8:58 AM, Lloyd - N9LB wrote:
> Hello Jay!
>
> Have you tried putting a string of "RF Suppression Snap-On Ferrites" on the power cord?
>
> Are the dimensions of the cord such that it is possible to use "RF Suppression Snap-On Ferrites"?  The largest I could find are .75" inside diameter.  https://www.dxengineering.com/search/part-type/rf-suppression-snap-on-ferrite-beads
>
> If the power cord for the electric stove is too large, perhaps the Snap-On Ferrites could be added to the Romex  cable feeding the stove outlet if the wiring is accessible, such as in an unfinished basement.
>
> 73
>
> Lloyd - N9LB
>
> -----Original Message-----
> From: Topband [mailto:topband-bounces at contesting.com] On Behalf Of JAYB1943 at OPTONLINE.NET
> Sent: Sunday, November 06, 2016 9:34 AM
> To: topband at contesting.com
> Subject: Topband: RF interference from 160m to GE Electric stove
>
> Hi guys – I have recently added a 160m amp to my station and have created an RFI problem I can’t solve.
> When I transmit on 160 with any more than 150 watts, the GE electric stove in the kitchen ALARMS and must be reset. I guess the 160 signal from the vertical is getting into the AC power lines (just a few feet away from the AC feed off the pole) and then into the electronics into the stove. Reducing the output power to 125 watts or so does not cause the problem. Not a permanent condition; hitting the stop button on the stove controls stops the stove alarm but starts again when I transmit. My XYL HATES alarms—she is a retired ICU RN and I think she got conditioned to panic when ANY alarm goes off !
> Anyhow I wondered if anybody has any similar experience with problems like this on 160 and how to solve them. I am tempted to just have an electrician come in and install a BIG RF filter on the AC line – either just on the Stove line or to the main feed but I fear this is a lot of $$$. I am hesitant to do this one on my own for insurance reasons if nothing else.
>     Any ideas ?
>                    Thanx – Jay NY2NY
>
>
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