Hi, Roy,
As I approach a year's ownership of the K3, I have to say that there are very few times that I find the NR capability to be useful. On a very noisy band and with reasonably wide bandwidths (> 800 Hz) the NR can work well, but never without pressing the Level button and optimizing the setting each time. When I compare the K3's NR with my K2's, the K2 seems far superior to me. It may be because the K2 does its DSP at the audio instead of the IF, or it may be that the K2 implements longer FIR filters. Whatever the reason, the K2's noise reduction works much better and in my shack is left on almost all the time. Both the K3 manual and the Wikipedia explanation of the K3 noise reduction recommend using NR only with a wide bandwidth, and imply that it is not as effective on SSB as it is on CW. I concur with these recommendations, but I have to say that I agree with you. The NR implementation could have been done much better. 73, John Roy Morris-6 wrote: > > When I turn on NR the audio noise level goes down. When a SSB signal is > received the audio peaks. I have my RX EQ set flat. In these peaks there > are resonances in my internal speaker (if I use it) as well as my two > external speakers that plainly makes noise reduction unpleasant. It can > be minimally tolerated at F-1-1 level with speakers. It is somewhat more > tolerable with a good headset. Part of the problem may be in speaker > response, but I also think a big part of the problem is in the noise > reduction algorythms. If noise reduction is not recommended with reduced > bandwidth in CW, and unpleasant artifacts occur in SSB; then I find NR to > be useless. I hope the discussion of white noise and pink noise will lead > to something that will improve the noise reduction function in the K3. > Roy Morris W4WFB > -- View this message in context: http://n2.nabble.com/K3-Noise-Reduction-tp2727716p2728425.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ 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
