Bob,
I had to chuckle about your experience on triggering all that stuff in
the house. :-)
Although not HF band RF interference but I solved an RFI issue on 2
meters with snap on ferrites also.
When I keyed up my 50 watt 2 meter xcvr it would activate the garage
door opener on the house next door. :-)
I probably could have changed the frequency code on his unit but the
ferrites worked fine. I don't know the mix
just tried a couple of clamp ons I had.
Bob
K6UJ
On 11/6/16 8:20 AM, Bob Lawson N6RW wrote:
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@contesting.com] On Behalf Of
JAYB1943@OPTONLINE.NET
Sent: Sunday, November 06, 2016 9:34 AM
To: topband@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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