I have a question(s) about the Crystal Filter boards that I need some professional advice/information from the group.
1. Is it possible to use standard crystals and achieve a 50khz/25khz/10khz bandwidth for AM/FM reception? 2. Any links to a windows based filter design software available?
I lost my old software when my disk crashed and my old saved links are hitting dead ends, I not keen on the online calculators that I’ve seen out there now.
