Hello List and Robin, Robin asked for some of my settings that I use on my K3 regarding the new NR in Firmware 3.27, and I thought that it may help the Group to post them here.
These are answers to Robins questions, so keep this in mind. AND...I use my K3 almost 100% as an IF for VHF Bands, so it is being fed from external XV's , not an HF antenna. The K3 does see HF use, but at present I am using a new toy..a Thomson CSF TRC300 HF Military Manpack, but when that novelty wears off, I'll be back on the K3. Back to Robins questions.. My K3 in Serial Number 63, with NO modifications at all. I am about to do the lot when I get my K144XV shortly, as the radio will be open for that installation. AGC is set for SLOW, and NR for F1-2 normally, or sometimes F1-4 With the NR OFF, I see about S1-2 Noise ( listening on 144 Mhz ). The Two Meter Band at this QTH is slowly getting noisier, with all manner of crap appearing on a daily basis from what was, 17 years ago, an almost silent Band :( I usually use the 2.7 Khz Filter ( 5 Pole ? ) BW/SHIFT/Hi/Low Settings are.. FC 1.5 , LO 0.15 , Hi 2.85 Filter 2.7 Khz When I turn NR ON, it is an almost instant "quiet " effect. There is a perceptible " echo " effect, but not annoyingly so...but I suppose this is a very personal opinion...it may annoy the hell out of others. I have found that DSP NR is not a magic Pill...it can help resolve a very weak signal, but is not a miracle worker. Most of my listening is through external Stereo Speakers ( Computer type add ons, powered ) but for really weak stuff, I use those EX29 Extreme Isolation H/Phones, that are excellent. AFX is usually OFF, but I have found on occasion , that it helps to turn it ON. AGC is set as...DLY SOFT , HLD 0.02 , PLS NOR , SLP 014 , THL 006 , -F 120 , -S 020 RX Equalizer Curve is flat...after reading recent comments about NR etc.. That should answer all of Robins questions...and fire away with any more if you have them. From a weak signal VHF Operators ( SSB ) point of view, I have always thought that the NR function was good ( early days...the echo thing annoyed me, but comparing the K3 to various Icom DSP NR Systems , it was streets ahead ) to excellent in more recent times. As I was typing this reply, I had a call from a Station on 144 Mhz SSB who is about 300k away, and it was a 5/1 type signal...I engaged NR at F1-4 and found I had to back off to F1-1 , which then made it just a voice with little to no white noise content...a slight echo, but much easier to listen to minus all the Band noise. 73 Glenn VK4BG ______________________________________________________________ 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
