[NLRS] VHF low pass filters?

[tosca005 at umn.edu]

Well, I left out part of the story. Before we put the 50 MHz notch filter 
on the cable TV entry point, I also caused his touch sensitive lamps to 
flash on and off every time I transmitted on 6 meters, in addition to 
getting my voice into his TV. But AFAIK, it all went away once the notch 
filter was installed. Thank goodness for friendly, cooperative neighbors. 
:)

73 de W0JT/5

On Jan 2 2013, Chris Elmquist wrote:

>
>
>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.
>> 
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>