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106.9MHz notch filter
Hi,
I am a newbie here and have just dropped in to ask a single technical question. Living as I do in a suburban area, I use an FM antenna to draw the stations located in a certain vector from me. A station of interest is located at 107.1MHz but is interfered with by an off-axis stronger signal at 106.9MHz The FM antenna has a "standard" 300ohm screw connection for the lead-in (to which I connect a 300/75 xfmr and use coax down). I would appreciate anyone's help in designing and implementing a notch filter that would suck out a major part of the interfering energy. It seemed to me that a reasonable attempt would be to use a piece of 300ohm flat-lead and short it at an appropriate distance from the screw-terminals of the antenna. None of my attempts have yielded any observable improvements. It may be that the filter must be "deeper" (higher Q?) than what my attempts provide. Any ideas? Thank you. ....Bryce |
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