Yes, I agree. The outlet strip was a bad choice but all I had at the time to
try. I am going to make up a choke per your paper which I have and first
chance I get I'll try it out on their set. I use #31 mix snap-on's all over
the shack, but I'll need a big one for this project.
73
Dale, k9vuj
On 25, Mar 2014, at 14:34, Jim Brown <jim@audiosystemsgroup.com> wrote:
> On 3/25/2014 11:49 AM, Dale J. wrote:
>> Once when I had access to the TV, I tried one of those outlet strips with
>> filtering and it made no difference
>
> I would not expect it to. They only affect the differential mode signal. As
> Ed has noted, the signal can be radiated common mode on the power cable, on
> an antenna (or CATV) cable, and even on cables connected to an A/V rig. If
> it's common mode, you need serious mutli-turn ferrite chokes, not "filters."
> Below 7 MHz, Fair-Rite #31 is the weapon of choice. Above 10 MHz, #31 is
> still quite effective, but #43 is slightly better. See my choke cookbook for
> some winding guidelines. Luckily, I've yet to encounter a plasma set, but
> there was a report, I think on this reflector, from a ham who had pretty good
> suppression with a choke on the power cable.
>
> It's also possible for RFI to be radiated from wiring internal to the set,
> and chokes won't help with that mechanism.
>
> 73, Jim K9YC
> _______________________________________________
> RFI mailing list
> RFI@contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
|