[Elecraft] Plasma TV Noise any ideas on how to filter it out.

[Fred Jensen]

On 11/26/2010 2:20 PM, Don Wilhelm wrote:
>    It is a shame that there is not more FCC enforcement directed at
> manufacturers rather than at consumers.
> Have you ever tried to convince a consumer that his expensive TV is
> producing radiation that is interfering with your ham radio?  Talk about
> getting that "deer in the headlights" stare!
> The worst thing that the FCC could have done is regulate the consumer
> (don't use it if it causes interference).  Consumers just cannot believe
> that anything they have purchased would create a problem for others.

As the world becomes more and more electronic, this is going to continue 
to increase as a problem, and not just interference to us.  In the 50's 
TV manufacturers experimented with a 21 MHz IF, a monumentally stupid 
choice.  During the "BPL Scare," I modeled the power distribution which 
passes over our property and my antenna and found that on all bands 
except 160, the coupling loss between my antenna and the power line was 
in the -35 dB range.  Loss was less on 160 since the lines and antenna 
were well withing the near fields.

A little arithmetic suggested that, at 1KW [a legal power for me] inside 
the ham bands, my neighbor's BPL box would surely hear me.  I have no 
idea how I'd maintain a civil relationship with them when I insisted it 
is their problem not mine.  I've always loved the FCC's comments in rule 
making that the "Amateur can mitigate interference to non-licensed 
services by reorienting the antenna."  Like, if I want to work ZL8X, I'm 
going to point my antenna at 090 instead of 270 to avoid RFI?

Incidentally, FWIW I host the neighborhood wireless RAP at the top of my 
tower, just below the tribander, in return for free internet.  My old 
TS-850 occasionally caused it to reset at 1KW on 15m.  The K3 has never 
done so.  ??

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2011 Cal QSO Party 1-2 Oct 2011
- www.cqp.org