Re: [Elecraft] [K3] K3 NR
David Woolley (E.L) wrote: The main source of published research on real time noise reduction of audible signals seems to be the hearing aid industry. I just came across this article suggesting that hearing aid noise reduction strategies make people think that the noise is less sever, but don't actually make the signal any more intelligible. Trends in Amplification, Volume 10, No. 2, June 2006: Acceptance of Background Noise, Mueller et al. http://tia.sagepub.com/cgi/reprint/10/2/83.pdf That's an interesting article David! It agrees with my feelings over the many years I've tried various types of noise reduction. Sometimes I think we're fooled by the level changes introduced by NR, when in fact we could probably do as well simply by turning AF Gain down a little. A few years ago when NQ5T and I both had Orions, I challenged Grant to measure the actual S/N with NR on and off. At narrow bandwidths, there was no difference in measured S/N. Of course this was for CW where NR simply builds a narrow filter around a discrete signal. I believe a filter is a filter is a filter...whether crystal, DSP or NR. There is no magic. 73, Bill -- View this message in context: http://n2.nabble.com/K3-NR-tp3515659p3541483.html Sent from the [K3] 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
Re: [Elecraft] [K3] K3 NR
Bill W4ZV wrote: David Woolley (E.L) wrote: The main source of published research on real time noise reduction of audible signals seems to be the hearing aid industry. I just came across this article suggesting that hearing aid noise reduction strategies make people think that the noise is less sever, but don't actually make the signal any more intelligible. Trends in Amplification, Volume 10, No. 2, June 2006: Acceptance of Background Noise, Mueller et al. http://tia.sagepub.com/cgi/reprint/10/2/83.pdf That's an interesting article David! It agrees with my feelings over the many years I've tried various types of noise reduction. Sometimes I think we're fooled by the level changes introduced by NR, when in fact we could probably do as well simply by turning AF Gain down a little. A few years ago when NQ5T and I both had Orions, I challenged Grant to measure the actual S/N with NR on and off. At narrow bandwidths, there was no difference in measured S/N. Of course this was for CW where NR simply builds a narrow filter around a discrete signal. This was for Orion II, but for anyone interested, here's the summary by Grant NQ5T: http://lists.contesting.com/archives//html/TenTec/2006-03/msg01118.html On March 25, 2006, NQ5T wrote: [TenTec] Orion II NR Performance Measurements I won't bore you with the setup here, but will be happy to provide details to anyone who is interested. Consistent results were obtained by two independent methods: (1) graphical computation of SNNR, and (2) spectral analysis software that directly computes an estimate of SNR. The results are as follows (LCW, 1000Hz spot tone, NR=9) BW=3000Hz: SNNR improves by approx 1dB with NR=9. BW=500Hz: SNNR degrades by approx 2dB with NR=9. There is improvement at 3 Khz bandwidth, but it's negligible. At 500 Hz (and anything below that as well) you're better off without NR at all. The distortion created by NR at any bandwidth in both CW tone and SSB voice is very unpleasant compared to typical noise reduction products. Even without having a v1 Orion to compare with I'm basically moving from the uncertain bench to the put it back the way it was bench. Grant/NQ5T -- View this message in context: http://n2.nabble.com/K3-NR-tp3515659p3542357.html Sent from the [K3] 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
Re: [Elecraft] [K3] K3 NR
Bill W4ZV wrote: [about NR and SNR] I've been watching this thread with interest. For a few years and several different radios, I've been repeating the same test: 1) Tune around with a bandwidth of about 400 Hz. Find a weak CW signal close to the noise which I can't copy 100%. 2) Try all the possible techniques to improve intelligibility, looking for the ones that improve the percentage of copy. Here is what I've learned: 1) If there is a kind of noise that a NB will reduce, that helps. 2) If there is not too much noise, reducing the bandwidth further helps. I sometimes go down to 50 Hz. on the K3. But on a noisy band this makes it worse. 3) AFX doesn't matter one way or the other. 4) Dual-diversity reception (polarization diversity) *REALLY* helps. IMHO this is one of the K3's greatest features. 5) NR doesn't help with the weakest signals. 6) I can't decide what pitch is best. Usually I use around 500 Hz. but that's because I like the sound of it. -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco __ 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
Re: [Elecraft] [K3] K3 NR triggering
Steve Ellington wrote: I just had a CW QSO on a noisy 80m. Here's what I noticed with NR set for F1-3. BW set for 2.5 kHz. QRN very loud! I pushed NR. Band goes almost totally silent. Calling CQ with the bug was like being in TX mode but I was using QSK as always. Wow...Nice and quiet. Then someone answered my CQ. On his very first DIT, the noise level jumped up and stayed up throughout the entire QSO. It was quieter than no NR at all but why should it stay that way??? Remember that NR is an adaptive filter. When you perturb it with a coherent signal it rebuilds the filter around that signal. F1 is the longest tap setting which means it has the greatest stored data stream and will take the longest to respond when you add new data (i.e. a signal). Once the new input to the filter (signal plus noise) is steady state, the filter will then stay in that state until the inputs change again (i.e. when the signal goes away). 73, Bill -- View this message in context: http://n2.nabble.com/K3-NR-triggering-tp3521099p3524344.html Sent from the [K3] 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
Re: [Elecraft] [K3] K3 NR
Joe: I listended with a Heil ProSet last night... I will check the impedance, dont know it offhand. True, a mismatch would add to the effect. -lu- - Original Message Follows - From: Joe Subich, W4TV li...@subich.com To: 'Lu Romero - W4LT' lrom...@ij.net, elecraft@mailman.qth.net Subject: RE: [Elecraft] [K3] K3 NR Date: Wed, 26 Aug 2009 22:19:23 -0400 I prefer the sound of the 3.25 version for ssb, its cleaner and somewhat less bright (flatter in response). I had to tweak the RX EQ to add some bass in the 3.27 version or it sounds harsh in my headsets (I dont use speakers hardly ever, btw). What is the impedance of your headphones? With anything less than 100 Ohms or so, the stock 10 uF headphone coupling caps cause a significant LF roll off - particularly with 8 Ohm cans. 73, ... Joe, W4TV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Lu Romero - W4LT Sent: Wednesday, August 26, 2009 10:09 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] K3 NR Lyle: Just played with the NR in both SSB and CW, on 80 and 40. First, I can hear the change of the filters now without turning things on and off, as you mentioned it would work. The frequency response is decidedly less flat (less bassy) than the sound of 3.25. For CW, the 3 and 4 settings are much more efficient, not so in SSB, where the 1 and 2 settings are much cleaner sounding and better copy. I found that with no antenna and with the RF gain turned to 12 o'clock... Turn on the NR and all receiver white noise mutes and slowly ramps up. That's a recursive effect, I guess. I prefer the sound of the 3.25 version for ssb, its cleaner and somewhat less bright (flatter in response). I had to tweak the RX EQ to add some bass in the 3.27 version or it sounds harsh in my headsets (I dont use speakers hardly ever, btw). Inteligibility is marginally better with 3.27 on ssb and quite a bit better on CW, so you have drifted a bit to the CW side of the equation, but with a decent compromise for SSB. No more boingy peakyness in any mode, which is good, and the level while it still drops a bit, is better behaved. Can I assume from some comments I have read here that the NR process is pre EQ and AGC? How exactly do the processes stack in the radio architecture? If NR is at the top of the stack, a decent fix might be to somehow gang these three processes using presets so that they can be set up ahead of time and recalled from a memory button by the user. As an old brodcaster, we used to preset things in Switchers (vision mixers to UK readers) using a process called E-MEM... Which could recall preset parameters in salvos to preset multiple settings. This might work here. This would be handy in a contest environment where a minimum of tweaking and rapid adaptation to changing conditions is needed... You could play outside of a contest and create the settings then in the heat of battle, recall them with a single button push from a canned setup. It wouldnt be perfect for any environment, but it might mean the difference between working a mult and not working a mult. And multipliers, after all, are :) As you said, every receiving environment is different, but some generalizations can be made and being able to recall the multiple settings would be a definite plus feature of the radio. Thanks for letting us test these iterations. Lu Romero - W4LT K3 # 3192 Lyle Johnson wrote: ...For now I'll treat the parameter as an opaque series of magic numbers. The way the new beta NR works is: Fx-y x selects the length of the filter. F1 = 121 taps, F2 = 91 taps, F3 = 61 taps, F4 = 31 taps (The Beta 3.25 release used FIR filters of 61 taps.) y selects values of Beta (gain), decay, and delay (how long the NR algorithm waits to process a signal) (The Beta 3.5 release used the x parameter for these selections) 73, Lyle KK7P ___ ___ 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 -- View this message in context: http://n2.nabble.com/K3-NR-tp3515659p3520809.html Sent from the [K3] 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
Re: [Elecraft] [K3] K3 NR triggering
Thanks for the nice explanation Bill. It is effective but weird. Somone needs to make a movie. Steve N4LQ n...@carolina.rr.com - Original Message - From: Bill W4ZV btipp...@alum.mit.edu To: elecraft@mailman.qth.net Sent: Thursday, August 27, 2009 7:12 AM Subject: Re: [Elecraft] [K3] K3 NR triggering Steve Ellington wrote: I just had a CW QSO on a noisy 80m. Here's what I noticed with NR set for F1-3. BW set for 2.5 kHz. QRN very loud! I pushed NR. Band goes almost totally silent. Calling CQ with the bug was like being in TX mode but I was using QSK as always. Wow...Nice and quiet. Then someone answered my CQ. On his very first DIT, the noise level jumped up and stayed up throughout the entire QSO. It was quieter than no NR at all but why should it stay that way??? Remember that NR is an adaptive filter. When you perturb it with a coherent signal it rebuilds the filter around that signal. F1 is the longest tap setting which means it has the greatest stored data stream and will take the longest to respond when you add new data (i.e. a signal). Once the new input to the filter (signal plus noise) is steady state, the filter will then stay in that state until the inputs change again (i.e. when the signal goes away). 73, Bill -- View this message in context: http://n2.nabble.com/K3-NR-triggering-tp3521099p3524344.html Sent from the [K3] 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 __ 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
Re: [Elecraft] [K3] K3 NR
I come back to 3.25 also ; was much better with 3.25. Here audio is much lower with 3.27. 73, Laurent F6DEX -- View this message in context: http://n2.nabble.com/K3-NR-tp3514982p3518767.html Sent from the [K3] 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
Re: [Elecraft] [K3] K3 NR
P.B. Christensen wrote: Until I purchased the '7800 back in 2005, the only other radio I've owned that would produce ultra-low-pitch CW was the TS-870 but I never bothered trying low pitch CW reception until I tried it with the Icom. The TS-930S had an infinitely variable PITCH control which went down to zero (and maybe even beyond to negative IF since it was analog). It simultaneously adjusted sidetone, filter center and TX offset so you were always zero beat if you matched the sidetone to the signal. It was easy to tune in a weak signal and then adjust PITCH for the optimum S/N for your ears. This is how I discovered my ears liked the 240-270 Hz range. Orion also allows setting PITCH as low as 200 Hz but I never used settings that low based on my experience with the 930. I still have my 930 and may have to drag it out to see what 50 Hz sounds like, but that sounds awfully low based on my previous experience. I still don't understand why the K3 limits us to 300 Hz PITCH when Orion (which has a very similar block diagram) goes to 200 Hz. Ten-Tec changed their original lower limit of 300 Hz to 200 Hz within a month of my request to lower it...and they also keep their crystal filters centered instead of shifting them at lower PITCH settings (as the K3 does), so the radios apparently have some differences that are not obvious to me. 73, Bill -- View this message in context: http://n2.nabble.com/K3-NR-tp3515712p3519877.html Sent from the [K3] 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
Re: [Elecraft] [K3] K3 NR
low based on my experience with the 930. I still have my 930 and may have to drag it out to see what 50 Hz sounds like, but that sounds awfully low based on my previous experience. Not too many rigs have the audio capabilities to produce a reasonably flat response to 100 Hz and below. So, while the TS-930 may have had the ability to shift that low, it would be interesting to see if the audio path could produce the low offset. I have re-designed the audio path of the TS-850 (mods available on the KA0KA website) and TS-950 receivers, both of which required substantial invasive work to bring down below 100 Hz. Paul, W9AC __ 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
Re: [Elecraft] [K3] K3 NR
I agree alsoWayne and the boys hit it just right for me. Great job. Very noisy 40M today and the combination of the NB 3-3 and AFX pulled real understandable voices out of junk. I will play with the setting for awhile until I fine what is optimal for me but all in all it is just splitting hairs at this point. Dan AD4C2009 wrote: Ian,I am with you,it works outstanding now,I don't even lose the audio as other said,it drops a liitle bid but still is confortable to my ears but the noise is totally GONE ! About the low end roll-off on version 3.25 was at 30 Hz,now with 3.27 is at 60Hz,who needs to hear that low? besides do your speaker respond to 30Hz,besides does anyone on ESSB respond that low? so 60 Hz is ok with me.73 to all AD4C - Dan AB3EN -- View this message in context: http://n2.nabble.com/K3-NR-tp3515712p3520029.html Sent from the [K3] 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
Re: [Elecraft] [K3] K3 NR
Brett Howard wrote: As far as the shift you're mentioning are you talking about the fact that the FC star moves to the freq that you have pitch configured for? The filter is still centered in the IF land but it looks like a shift because the K3 tells you about its filters in AF terms. No. At low pitches, the MCU shifts the IF filter such that the lower side is never lower than ~200 Hz. If you're using a 500 Hz XFIL and PITCH 300, the XFIL passband is actually 200-700 Hz...not 300 +/-250 (i.e. not 50-550 which would be centered). Even though you see FC*.30 for the DSP filter, the IF filter is actually offset. 73, Bill -- View this message in context: http://n2.nabble.com/K3-NR-tp3515712p3520443.html Sent from the [K3] 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
Re: [Elecraft] [K3] K3 NR
Lyle: Just played with the NR in both SSB and CW, on 80 and 40. First, I can hear the change of the filters now without turning things on and off, as you mentioned it would work. The frequency response is decidedly less flat (less bassy) than the sound of 3.25. For CW, the 3 and 4 settings are much more efficient, not so in SSB, where the 1 and 2 settings are much cleaner sounding and better copy. I found that with no antenna and with the RF gain turned to 12 o'clock... Turn on the NR and all receiver white noise mutes and slowly ramps up. That's a recursive effect, I guess. I prefer the sound of the 3.25 version for ssb, its cleaner and somewhat less bright (flatter in response). I had to tweak the RX EQ to add some bass in the 3.27 version or it sounds harsh in my headsets (I dont use speakers hardly ever, btw). Inteligibility is marginally better with 3.27 on ssb and quite a bit better on CW, so you have drifted a bit to the CW side of the equation, but with a decent compromise for SSB. No more boingy peakyness in any mode, which is good, and the level while it still drops a bit, is better behaved. Can I assume from some comments I have read here that the NR process is pre EQ and AGC? How exactly do the processes stack in the radio architecture? If NR is at the top of the stack, a decent fix might be to somehow gang these three processes using presets so that they can be set up ahead of time and recalled from a memory button by the user. As an old brodcaster, we used to preset things in Switchers (vision mixers to UK readers) using a process called E-MEM... Which could recall preset parameters in salvos to preset multiple settings. This might work here. This would be handy in a contest environment where a minimum of tweaking and rapid adaptation to changing conditions is needed... You could play outside of a contest and create the settings then in the heat of battle, recall them with a single button push from a canned setup. It wouldnt be perfect for any environment, but it might mean the difference between working a mult and not working a mult. And multipliers, after all, are :) As you said, every receiving environment is different, but some generalizations can be made and being able to recall the multiple settings would be a definite plus feature of the radio. Thanks for letting us test these iterations. Lu Romero - W4LT K3 # 3192 Lyle Johnson wrote: ...For now I'll treat the parameter as an opaque series of magic numbers. The way the new beta NR works is: Fx-y x selects the length of the filter. F1 = 121 taps, F2 = 91 taps, F3 = 61 taps, F4 = 31 taps (The Beta 3.25 release used FIR filters of 61 taps.) y selects values of Beta (gain), decay, and delay (how long the NR algorithm waits to process a signal) (The Beta 3.5 release used the x parameter for these selections) 73, Lyle KK7P __ 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 -- View this message in context: http://n2.nabble.com/K3-NR-tp3515659p3520809.html Sent from the [K3] 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
Re: [Elecraft] [K3] K3 NR
I prefer the sound of the 3.25 version for ssb, its cleaner and somewhat less bright (flatter in response). I had to tweak the RX EQ to add some bass in the 3.27 version or it sounds harsh in my headsets (I dont use speakers hardly ever, btw). What is the impedance of your headphones? With anything less than 100 Ohms or so, the stock 10 uF headphone coupling caps cause a significant LF roll off - particularly with 8 Ohm cans. 73, ... Joe, W4TV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Lu Romero - W4LT Sent: Wednesday, August 26, 2009 10:09 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] K3 NR Lyle: Just played with the NR in both SSB and CW, on 80 and 40. First, I can hear the change of the filters now without turning things on and off, as you mentioned it would work. The frequency response is decidedly less flat (less bassy) than the sound of 3.25. For CW, the 3 and 4 settings are much more efficient, not so in SSB, where the 1 and 2 settings are much cleaner sounding and better copy. I found that with no antenna and with the RF gain turned to 12 o'clock... Turn on the NR and all receiver white noise mutes and slowly ramps up. That's a recursive effect, I guess. I prefer the sound of the 3.25 version for ssb, its cleaner and somewhat less bright (flatter in response). I had to tweak the RX EQ to add some bass in the 3.27 version or it sounds harsh in my headsets (I dont use speakers hardly ever, btw). Inteligibility is marginally better with 3.27 on ssb and quite a bit better on CW, so you have drifted a bit to the CW side of the equation, but with a decent compromise for SSB. No more boingy peakyness in any mode, which is good, and the level while it still drops a bit, is better behaved. Can I assume from some comments I have read here that the NR process is pre EQ and AGC? How exactly do the processes stack in the radio architecture? If NR is at the top of the stack, a decent fix might be to somehow gang these three processes using presets so that they can be set up ahead of time and recalled from a memory button by the user. As an old brodcaster, we used to preset things in Switchers (vision mixers to UK readers) using a process called E-MEM... Which could recall preset parameters in salvos to preset multiple settings. This might work here. This would be handy in a contest environment where a minimum of tweaking and rapid adaptation to changing conditions is needed... You could play outside of a contest and create the settings then in the heat of battle, recall them with a single button push from a canned setup. It wouldnt be perfect for any environment, but it might mean the difference between working a mult and not working a mult. And multipliers, after all, are :) As you said, every receiving environment is different, but some generalizations can be made and being able to recall the multiple settings would be a definite plus feature of the radio. Thanks for letting us test these iterations. Lu Romero - W4LT K3 # 3192 Lyle Johnson wrote: ...For now I'll treat the parameter as an opaque series of magic numbers. The way the new beta NR works is: Fx-y x selects the length of the filter. F1 = 121 taps, F2 = 91 taps, F3 = 61 taps, F4 = 31 taps (The Beta 3.25 release used FIR filters of 61 taps.) y selects values of Beta (gain), decay, and delay (how long the NR algorithm waits to process a signal) (The Beta 3.5 release used the x parameter for these selections) 73, Lyle KK7P __ 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 -- View this message in context: http://n2.nabble.com/K3-NR-tp3515659p3520809.html Sent from the [K3] 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 __ 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] [K3] K3 NR on SSB
The NR can do wonders... there were several QSOs I made that most likely would not have been possible without it. On the other hand, with a nearby LOUD station or splatter, it is very harsh to listen to. This may just be a fact of life, but am interested in any suggestions to improve it. Turning the gain and volume waaay down helped some. Some of the overdriven signals and splatter were downright ugly this weekend on 160. There were several stations where it was virtually impossible to copy anything within 3 Khz of their center frequency. I would have though they were running AM they were so wide. (no this isn't a negative comment on AM) Still I was hearing stuff others weren't and that was way cool! 73, Julius - Julius Fazekas N2WN Tennessee Contest Group http://www.k4ro.net/tcg/index.html Tennessee QSO Party http://www.tnqp.org/ Elecraft K2/100 #4455 Elecraft K3/100 #366 -- View this message in context: http://n2.nabble.com/K3-NR-on-SSB-tp2444928p2444928.html Sent from the [K3] 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
