Gary, a simple series L-C notch works best when - Q is high = you need a good coil (capacitor Q shouldn't be the problem) - the output "sees" a high impedance (FET buffer) - the source impedance is h
Ansoft Designer came up with this solution. http://www.g4jnt.com/518kHz_BandStop.gif The component values aren't particulalrly nice, and there is almost certainly a nicer design with transformer
Andy Talbot wrote: Ansoft Designer came up with this solution. http://www.g4jnt.com/518kHz_BandStop.gif The component values aren't particulalrly nice, and there is almost certainly a nicer design wi
Hi Andy. Where can I obtain a copy of Ansoft Designer from, I usually use Addie for filters, a second option would be worth having. 73 Ken M0KHW -- Original Message -- From: [email protected]
Hi LF, You may have seen an image of a NAVTEX signal on my 500KHz grabber at about 506KHz. The original of this image is at 518KHz. The receiver for this grabber is a Softrock Lite 455KHz module modi
Gary, Try a 10 dB attenuator in the ae feed or bigger one ? G ... From: [email protected] Gary - G4WGT Sent: Tuesday, May 19, 2009 9:57 PM To: [email protected] LF -RSGB LF Group Subject
Answers to all comments. It was modelled with lossless components. I didn't have to time to do any mofre than a basic cesign.. But its a relativlely benign filter so inductors with Qu of 40 plus
