Quote:
Originally Posted by olimazi
I'm willing to try the lc filter, can you guide me in the right direction.
Do I need the exact frequency of the station, 4368007 I believe.
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I will try. Channel 43 for WNJT is 644 to 650 MHz; channel 44 for WNYW is 650 to 656 MHz. The pilot carrier for WNYW is near the low end of the channel at 650.31 MHz, which is used by the tuner to lock on to the WNYW signal.
The challenge is to make the channel 43 signal weaker without doing harm to the channel 44 pilot.
Fortunately, the signal doesn't use the whole width of the 6 MHz channel.
A simple LC filter would consist of an inductor (coil) and a variable capacitor in series connected between the center conductor of the coax and the shield (ground).
A notch filter looks like this:
That type of filter would probably attenuate one FM channel, but I doubt that it would do what you want to make channel 43 weak enough to avoid harming channel 44.