[NLRS] VHF low pass filters?

[Chris Elmquist]

I remember once getting into a neighbor's TV...  my garbled voice coming
out the speakers...  when the TV was turned "off"!

They were a little freaked out.   I told them not to mess with me--
they have no idea what I am capable of :-)

I didn't get any more complaints.

Chris N0JCF


On Wednesday (01/02/2013 at 11:41AM -0600), tosca005 at umn.edu wrote:
> 
> 
> I agree with the majority of the replies I have seen so far, which
> suggest that it is unlikely you need a low pass filter on your 50
> MHz transmitter, but rather the neighbor needs to either have a high
> pass filter or a notch filter on his OTA TV system to overcome
> swamping of his front end.
> 
> I had a similar situation with my next door neighbor, who was trying
> to watch NFL football during the January VHF contest, and my 6M
> transmissions got into his TV even though his TV was exclusively
> connected to cable, not to an OTA antenna. Like your neighbor, mine
> was extremely pleasant and cooperative, just looking for help rather
> than looking for blame or to make trouble. At the time, I got a tiny
> 50MHz notch filter that fit inside of a small barrel with male and
> female F connectors on the ends. I inserted that into his cable
> connection between the outdoor feed and the house input feed.
> Problem was solved. I can't remember at the moment who made the darn
> thing, but it was a very effective and reasonably-priced solution.
> 
> Here is a discussion I found with Google that is a little under a
> year old, so hopefully it is still helpful:
> http://mailman.pe1itr.com/pipermail/moon-net/2012-February/002935.html
> 
> It sounds like a similar product, and there is one for 50 MHz and
> one for 144 MHz. Might do the trick if you can get one or both of
> them inserted BEFORE the preamp.
> 
> 73 de W0JT/5
> Still not making any RF to interfere with the neighbors yet.
> 
> 
> On Jan 2 2013, kp hpjr wrote:
> 
> >Group,
> >
> A neighbor approached me asking if I was operating the other night.
> He said that I had been interfering
> with his over the air TV signal. He placed the time frames during
> the MS rally and during this weekend Es opening.
> >
> I have only been on 6m as of late at times running up to 600w. His
> home is about 1000' away from me. His setup is a new digital TV with
> outdoor antenna fed with the typical radio shack type coax. His
> antenna is basically looking my way.
> >
> >I'm needing some help with this. Are there filters I/he can use?
> >
> I'm well grounded and use very good hardware...Andrews connectors
> and feedlines etc.
> >
> >Your input welcome.
> >
> >Kirk, N0KK
> >
> >BTW: 1st RFI complaint in 18 years.
> 
> ______________________________________________________________
> NLRS mailing list
> Home: http://mailman.qth.net/mailman/listinfo/nlrs
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:NLRS at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

-- 
Chris Elmquist