Already done. Using roofing and DSP width that are closely matched, a clicky signal that is down very steep skirts will be converted into pulses. The roofing and DSP skirts need to **combine to be as steep as possible**.
Set the NB to off for IF, and use DSP settings 2-7 or 3-7. I've had 3-7 suppress S9+10 key clicks to S3 (ABS noise level) in some instances, and able to use slow AGC as if the offending signal were not there. 2-7 makes the CW sound somewhat mushy, 3-7 makes CW signals sound real mushy, but fully readable. I routinely use NB set to DSP 2-7, no IF, just for this purpose. I use the 250 Hz (really 310 or 320) 8 pole narrow CW filter defined to the radio as 350 Hz and 350 DSP to live with ghastly clicks from a signal up 400 Hz while running. 73, Guy. On Tue, Dec 1, 2009 at 8:25 AM, Brian Machesney <nekvts...@gmail.com> wrote: > Stewart, > > I'm starting a new thread on this subject because your post reminded me to > write in on the subject. > > Since a "key click" is an impulse of signal to the RX, perhaps they could be > reduced by a "noise blanker" type of function. That will make it even more > impossible to know that you're close to an offending station! Now, if we > could just cancel the offending station's signal all together, there will be > no more QRM! > > -- > 73 -- Brian -- K1LI > > On Tue, Dec 1, 2009 at 4:41 AM, GW0ETF <gw0...@btinternet.com> wrote: > >> >> Ref key clicks..... adjust the onboard system which emits anti-phase sound >> to cancel the engine noise and so make them silent to other vessels nearby. >> >> So I wonder if it might be feasible to develop a system on the K3 to use >> the 2nd rx to listen to the offending signal and the software produce an >> anti-phase 'key click' in the main receiving bandwidth to cancel the >> clicks...? >> >> 73, >> >> Stewart Rolfe, GW0ETF (GW6W in cqww..) >> >> >> > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
