[NLRS] VHF low pass filters?

[tosca005 at umn.edu]

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.