Hi Stefan, Check out http://www.aade.com/filter.htm for a good & free filter design tool. It does support coupled resonator band-pass filters also. Coupled Resonator band-pass filters are likely to b
Hello Stefan, LF, may be this could be of some help? http://www.aade.com/filter.htm Regards Daniele From: Stefan Schäfer <[email protected]> To: [email protected] Sent:
Dear LF, Currently i am setting up my active antenna for the planned LF grabber here in Heidelberg. It is an active E field antenna, using a BF981 and a 125 kHz signal that transforms the 137 kHz dow