Hi,

I never made a NF (Notch Filter), but I am thinking about making a "stub"
(I think that's the term) NF for CATV to "block" a single "channel" coming in
on the digital TV cable system. Note: This "channel" consists of ANNOYING
ads/promos that you can not avoid or "turn off" when you use the "On Demand"
feature to look at a list of "on demand" available movies, TV shows, music
videos, etc.

I know the frequency, which by the way is between 200 and 300Mhz.

If I have this correct, the "stub" is a 1/4 wave length of the offending
frequency. The 75 ohm coax is cut to that length and is shorted on the far
end. The other end is connected via a "T" connector.

Also, I don't know if the notch will be "deep" (high Q) enough to make
the digital data "un-usable" (can't decode). Another concern is the width of
the notch. If it is too wide, it may affect the adjacent channel.

Does anyone have any suggestions, or can you recommend a place
where I can order a good CATV NF (I am willing to pay)?

Thank You in advance, John