[Rich A]

Originally Posted by Fonceur

Another option would be to put a filter to cut off that bounced signal from the southern antenna. Which is basically what cable companies do to remove the analog frequencies that their customers don't subscribe too. Now whether you could actually buy such a filter to only remove the specific frequency used by ABC in your area, I have no idea.

Oh yes . I investigated that in the beginning. For the filter to work it would have to be a deep "notch" filter. Something with steep skirts so as to not attenuate any close-by other signals. They do exist .. and are mostly used in the example you gave. But the PRICE .. egad. They are quite expensive.

I've seen some setups that are not so expensive where instead of using a single notch filter they used a low pass and high pass filter in parallel. Where the over-lapping end of each was the center frequency you wanted to notch out. A little less expensive but because they are cheaper, the skirts are not as sharp and you end up attenuating channels that are close by.

But that IS a way to do it if one wanted to spend the bucks. Which reminds me of something I had forgotten about. That would be a "stub" attenuator. Where you would attach a stub tuned to exactly the frequency of the signal you wish to get rid of. Hmmmm. That might be a way to go. Here in CT, in the old days when the TV front ends weren't so selective, we had a problem with TV channel 8. A lot of people like to get the next channel (9) out of Ney York. But if they lived anywhere near CT's Channel 8 the signal was so strong it would bleed over to channel 9 and mess up the picture. Way back then I used to work in a TV repair shop and a trick we used to do was to put a 300 ohm tuned "stub" on the TV's antenna terminals. This was simply a shorted length of 300 ohm twin-lead that was cut to the frequency of channel 8. I forget what the length was but 9 inches sounds familiar. I'd start at that length and while watching channel 9 keep cutting a 1/4 inch at a time and shorting it until the interference from the strong channel 8 went away. It didn't have any effect on the actual channel 8 as the signal was so strong to begin with. Wow .. thanks for jogging my memory. That may work out pretty good.