Dave, I used to have a notch filter for radio Merseyside on 1485 , but then it started sending on other frequency's as well , so I made the high pass filter from the arral handbook .. that solved the
In fact it is 32 times the line frequency - 15.625kHz x 32 =500kHz I do have a weakish carrier there, so that is probably what it is coming from. What puzzles me about this thread is why you need suc
Hi Dennis I guess insertion loss is fairly easy to deal with at these frequencies. Would it not be better to consider what you need to reject rather than how little to accept? This would make the tui
Hi Dennis. I manage quite well with a simple two reasonator filter with tapped capacitors for input and output impedance matching, response as follows, centre 501.9, 3dB, 495.8 & 508.26, 6dB, 492.77
Hi David, Jim! Thanks for Your answers! Yes, Jim, but a 3-resonator-filter seems to be the best tradeoff beetween selectivity, and my ability to tune it. Don't have any special measurement gear... ..
Dear Dennis, LF Group, So I ask myself and now You :) , would You say it's important to keep the full rx range from 495kHz to 510kHz and >pay the price of a worse stopband attenuation, or do You thin
