Jeff, I have compared the K3's APF with the filter offered in Elecraft's AF-1 Active Filter mini-module kit. There is no difference I can hear in the performance. Actually the AF-1 has more flexibility since you have two levels of "Q" to choose from, variable gain, and an independent variable low-pass filter function.
At $60, it's a great little filter. For an old vacuum-tube jockey like me it's satisfying to see digital gear struggling to do something as well as analog circuits, Hi! I'll hand it to Lyle; he succeeded with the APF. It's darn near as good as the AF1. Ron AC7AC -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of jeff martin Sent: Sunday, November 28, 2010 6:37 PM To: [email protected] Subject: [Elecraft] K2 APF implementation? Any chance we might see an implementation of APF for the audio-based DSP of the K2? I realize it might require swapping out U3 to implement the change. I would even give up some of the other functionality if adequate memory resources don't exist to implement an additional function. Any interest? Jeff N7KRT ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
