Re: [Elecraft] MCU 4.51, any affect on APF ?
As reported in earlier threads, 4.51 does seem to change the APF to a broader, less peaky shape, but it is less noisy, so the previous impression of a signal jumping out of the tip of an inverted audio V of noise is no longer there. You no longer have the inverted audio V full of noise to tell you where to tune the signal to peak it up. You have to remember it, or tune very slowly across it. The peak is still there. Personally, I like it a little better this way, but's that's only my take. It was reported by pre-beta testers as well. Dunno what Wayne is going to do about it. Also the CWT has been jostled in 4.51. That too under advisement by the brain trust. 73, Guy. On Sun, May 27, 2012 at 11:55 PM, Vic K2VCO k2vco@gmail.com wrote: I certainly can't quantify it, but it seems to me that the APF does not work as well now as it did before 4.51. It used to be a magic bullet. On 5/27/2012 8:31 PM, Bob K6UJ wrote: Can anyone give me feedback on 4.51 for the K3 as far as affecting the APF on CW sigs ? From what I've read so far the NB and NR are enhanced, I was wondering if it has any affect on the APF. tnx, Bob K6UJ -- 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 __ 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] MCU 4.51 Beta
When will the 4.51 come out of the beta stage. Looks like everyone is happy with the new changes. I am looking forward to it. Chris W7CTH __ 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] MCU 4.51, any effect on APF ?
Rob, If you mean Spot, I see no adverse effect. The improved NR and NB in my personal opinion, based on minimal experience are superb. I have not another rig with all this control to meet what I like. I tried last night in thunderstorm approaching, QSB, etc., and found the revisions much to my liking. Yes, subjective I know. 73, Bill K9YEQ -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bob K6UJ Sent: Sunday, May 27, 2012 10:32 PM To: Elecraft Mailing List Subject: [Elecraft] MCU 4.51, any affect on APF ? Can anyone give me feedback on 4.51 for the K3 as far as affecting the APF on CW sigs ? From what I've read so far the NB and NR are enhanced, I was wondering if it has any affect on the APF. tnx, Bob K6UJ __ 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] MCU 4.51, any affect on APF ?
We'll be doing careful measurements of APF pre-/post-4.51 this week. There was no intentional change to it, and to me, at least, it still sounds the same. Wayne N6KR On May 27, 2012, at 8:31 PM, Bob K6UJ wrote: Can anyone give me feedback on 4.51 for the K3 as far as affecting the APF on CW sigs ? From what I've read so far the NB and NR are enhanced, I was wondering if it has any affect on the APF. tnx, Bob K6UJ __ 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] MCU 4.51, any affect on APF ?
great, thanks Wayne Bob K6UJ On May 28, 2012, at 8:20 AM, Wayne Burdick wrote: We'll be doing careful measurements of APF pre-/post-4.51 this week. There was no intentional change to it, and to me, at least, it still sounds the same. Wayne N6KR On May 27, 2012, at 8:31 PM, Bob K6UJ wrote: Can anyone give me feedback on 4.51 for the K3 as far as affecting the APF on CW sigs ? From what I've read so far the NB and NR are enhanced, I was wondering if it has any affect on the APF. tnx, Bob K6UJ __ 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] MCU 4.51 Beta
No reason you can't download it and try it Chris. Mike W0MU W0MU-1 CC Cluster w0mu.net:23 or w0mu-1.dnsdynamic.com Http://www.w0mu.com On 5/28/2012 8:47 AM, Chris Hembree wrote: When will the 4.51 come out of the beta stage. Looks like everyone is happy with the new changes. I am looking forward to it. Chris W7CTH __ 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] MCU 4.51, any affect on APF?
... the previous impression of a signal jumping out of the tip of an inverted audio V of noise is no longer there... The original APF never worked for me when used with weak 160m sigs in the noise - the ringing made it more difficult for me to copy than without it. I have not had a chance to try it under 4.51 (until I finish my FCP :-) Less ringing would be good for me. Ralph, VE7XF __ 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] MCU 4.51, any affect on APF?
The high Q goes hand in hand with ringing, I actually try to adjust for the most ringing, hihi, it is hard to explain but I find a more piercing sweet spot this way. Bob K6UJ On May 28, 2012, at 9:51 AM, Ralph Parker wrote: ... the previous impression of a signal jumping out of the tip of an inverted audio V of noise is no longer there... The original APF never worked for me when used with weak 160m sigs in the noise - the ringing made it more difficult for me to copy than without it. I have not had a chance to try it under 4.51 (until I finish my FCP :-) Less ringing would be good for me. Ralph, VE7XF __ 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] MCU 4.51, any affect on APF ?
Wayne, This may be entirely dependent on signal level vs. AGC threshold. Prior to MCU 4.5x APF was generally working with signals that had already activated the AGC thus the peaking occurred above the threshold/slope. With the higher threshold, the noise is not held to a well defined level so the effect of the APF may not be as pronounced for signals below the threshold. The same issues are probably involved with the perceived CW decode issues. It is no longer sufficient to simply set threshold to auto and turn on decode. Now it can require some tweaking of the decode threshold as well as frequency and bandwidth to get good decoding. 73, ... Joe, W4TV On 5/28/2012 11:20 AM, Wayne Burdick wrote: We'll be doing careful measurements of APF pre-/post-4.51 this week. There was no intentional change to it, and to me, at least, it still sounds the same. Wayne N6KR On May 27, 2012, at 8:31 PM, Bob K6UJ wrote: Can anyone give me feedback on 4.51 for the K3 as far as affecting the APF on CW sigs ? From what I've read so far the NB and NR are enhanced, I was wondering if it has any affect on the APF. tnx, Bob K6UJ __ 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 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] MCU 4.51, any affect on APF ?
I was using the CWT decode functionality this weekend and still notice a decreased sensitivity or ability to decode but with a little tweaking I was able to get it to function. It may not be as good as previously but it still works fairly well. I am glad that Wayne and crew are looking into this. Keith AG6AZ Sent from my iPhone please excuse typos On May 28, 2012, at 12:58 PM, Joe Subich, W4TV li...@subich.com wrote: Wayne, This may be entirely dependent on signal level vs. AGC threshold. Prior to MCU 4.5x APF was generally working with signals that had already activated the AGC thus the peaking occurred above the threshold/slope. With the higher threshold, the noise is not held to a well defined level so the effect of the APF may not be as pronounced for signals below the threshold. The same issues are probably involved with the perceived CW decode issues. It is no longer sufficient to simply set threshold to auto and turn on decode. Now it can require some tweaking of the decode threshold as well as frequency and bandwidth to get good decoding. 73, ... Joe, W4TV On 5/28/2012 11:20 AM, Wayne Burdick wrote: We'll be doing careful measurements of APF pre-/post-4.51 this week. There was no intentional change to it, and to me, at least, it still sounds the same. Wayne N6KR On May 27, 2012, at 8:31 PM, Bob K6UJ wrote: Can anyone give me feedback on 4.51 for the K3 as far as affecting the APF on CW sigs ? From what I've read so far the NB and NR are enhanced, I was wondering if it has any affect on the APF. tnx, Bob K6UJ __ 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 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] MCU 4.51, any affect on APF ?
Can anyone give me feedback on 4.51 for the K3 as far as affecting the APF on CW sigs ? From what I've read so far the NB and NR are enhanced, I was wondering if it has any affect on the APF. tnx, Bob K6UJ __ 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] MCU 4.51, any affect on APF ?
I certainly can't quantify it, but it seems to me that the APF does not work as well now as it did before 4.51. It used to be a magic bullet. On 5/27/2012 8:31 PM, Bob K6UJ wrote: Can anyone give me feedback on 4.51 for the K3 as far as affecting the APF on CW sigs ? From what I've read so far the NB and NR are enhanced, I was wondering if it has any affect on the APF. tnx, Bob K6UJ -- 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
[Elecraft] MCU 4.51
__ 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] Mcu 4.51 Distortion
I don't hear any distortion on 20 meter cw at all. I had a friend also listen and neither one of us could hear any distortion. Toby W4CAk __ 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] MCU 4.51
Main and sub always use the same AGC settings. 73, Wayne N6KR On May 13, 2012, at 5:27 PM, Roy Morris wrote: When AGC THR and AGC SLP are changed in the CONFIG menu, are the settings changed for the KRX3 also or are there other steps? Thanks. Roy W4WFB __ 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] MCU 4.51
I know, thank you. 73 Arie PA3A Op 13-5-2012 22:29, David Gilbert schreef: Would you expect otherwise? There isn't anything the rig can do about that ... that's what directional antennas are for. Dave AB7E On 5/13/2012 4:08 AM, Arie Kleingeld PA3A wrote: When I had two stations of the same strength on exact the same freq it was still hard copy to pick only one out. 73 Arie PA3A __ 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] MCU 4.51
Took the FW4.51 for a spin at PI4D in the CQ-M on 20m in SSB and CW yesterday afternoon. AGC THR on 12, SLP on 10. Smooth operation, NB performed OK for the key clicks from a nearby freq. (NB is DSP 2-3 and IF MED3) Was it better than FW4.48? Not sure, but I like it that the threshold can be moved upward a bit, it was always on 8 before. I did not encounter big pile-ups. When I had two stations of the same strength on exact the same freq it was still hard copy to pick only one out. 73 Arie PA3A __ 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] MCU 4.51
When I had two stations of the same strength on exact the same freq it was still hard copy to pick only one out. No hardware, no firmware, no nothing will ever solve this ... zero beat is zero beat. ;-)) Vy 73, Olli - DH8BQA http://www.dh8bqa.de/ __ 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] MCU 4.51
For taking care of key clicks, NB LEVEL set to DSP t1-7 or t2-7 and IF *OFF* is best. I got excellent results with the milder t1-7 in 4.51. IF ON is traditional IF blanking with all the traditional artifacts. Kept on the K3 because it's still best for some kinds of noise. Traditional IF blanking in anyone's RX still will create lots of artifacts in a crowded contest band with lots of strong signals, including the K3. 73, Guy. On Sun, May 13, 2012 at 7:08 AM, Arie Kleingeld PA3A p...@xs4all.nl wrote: Took the FW4.51 for a spin at PI4D in the CQ-M on 20m in SSB and CW yesterday afternoon. AGC THR on 12, SLP on 10. Smooth operation, NB performed OK for the key clicks from a nearby freq. (NB is DSP 2-3 and IF MED3) Was it better than FW4.48? Not sure, but I like it that the threshold can be moved upward a bit, it was always on 8 before. I did not encounter big pile-ups. When I had two stations of the same strength on exact the same freq it was still hard copy to pick only one out. 73 Arie PA3A __ 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] MCU 4.51
Guy, Well, both NBs create artifacts if pushed to hard. I have not encountered any problems when using this config (DSP x-3 and IF med-3). If I run any of the two NBs on x-7 it really becomes bad. But your advice inspires me to experiment again. 73 Arie PA3A Op 13-5-2012 15:16, Guy Olinger K2AV schreef: For taking care of key clicks, NB LEVEL set to DSP t1-7 or t2-7 and IF *OFF* is best. I got excellent results with the milder t1-7 in 4.51. IF ON is traditional IF blanking with all the traditional artifacts. Kept on the K3 because it's still best for some kinds of noise. Traditional IF blanking in anyone's RX still will create lots of artifacts in a crowded contest band with lots of strong signals, including the K3. 73, Guy. __ 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] MCU 4.51
Would you expect otherwise? There isn't anything the rig can do about that ... that's what directional antennas are for. Dave AB7E On 5/13/2012 4:08 AM, Arie Kleingeld PA3A wrote: When I had two stations of the same strength on exact the same freq it was still hard copy to pick only one out. 73 Arie PA3A __ 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] MCU 4.51 NB
Joe said The only problem is that my poor antennas don't given me enough strong signals to really evaluate strong signal pile-up with off air signals at the higher thresholds. Turning on the pre-amp will increase the noise level, increase the signal strength of those signals already there and perhaps bring in a few more signals to help with the testing. It's a simple thing to do. David G3UNA On 12/05/2012 22:19, Don Wilhelm wrote: I fail to see any advantage to turning on the preamp when it is not needed. If you can hear the atmospheric noise without the preamp, leave it off (if the noise level increases when the antenna is attached, you have enough gain). By extension, if you can still hear the atmospheric noise with the attenuator in, leave it in - using more front end gain than is necessary for the band and antenna conditions will only reduce the dynamic range of the receiver. If you do not know what that means in terms of operating, let me put it simply - you may not hear that weak one that you would have heard if you had set the preamp and attenuator properly. Technical discussion - the band noise is S-3 with the preamp off. The K3 will start to overload on a signal that is S9+70, and will hear signals that are greater than the S-3 band noise level. Turn the preamp on, and the band noise raises to about S-5, but the K3 overloads on that signal that is now S9+70, so you can now only hear between S5 and S9+70 where before you could hear between S3 and S9+70. You have reduced the dynamic range by turning on the preamp when it was not needed. BTW - The S9+70 overload point I used was just an example off the top of my head - I do not have the overload point for the K3 at handy reference, so use that as a for instance rather than as an absolute data point. (also BTW - my overload term is technically referred to as the compression point). 73, Don W3FPR On 5/12/2012 6:56 PM, David Cutter wrote: Would it help the tests to engage the pre-amp? ie make things more challenging. David G3UNA On 12/05/2012 17:22, Joe Subich, W4TV wrote: On 5/12/2012 12:17 PM, Ted Bryant wrote: Was v4.51 sent to the 4.50 testers? Apparently not all (I had to request it). I've been doing some crude testing ... with 4.51 AGC THR = 15 is approximately -73 dBm/S9 (to the best of my ability to measure with the XG3 and step attenuator). With high values for AGC THR it is important to use higher values of AGC SLP otherwise a sudden very strong signal will drive the audio amp and/or headphone amp into severe distortion - particularly if the AF Gain is high. I'm finding AGC THR in the 12/13 range and SLP in the 8/10 range is very comfortable and seems to open up the K3 receiver. The only problem is that my poor antennas don't given me enough strong signals to really evaluate strong signal pile-up with off air signals at the higher thresholds. 73, ... Joe, W4TV __ 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] MCU 4.51
I found on what I was listening to, that turning off the IF blanking cleaned it up and t1-7 or t2-7 was incredible for key clicks. The other thing was that I always carefully minimize signal input on lower bands with ATT/ /PRE/RFgain at only high enough to bring up band noise to moderate in the passband. Additionally I used the 8 pole CW filters, and set their offset so that the -30 dB points were equal either side when the DSP and the true filter bandwidth matched (450 and 350). The 350 in particular turns the clicks into spikes, which the K3 and NB handle extremely well. I have seen key clicks reduced 7 or 8 S units in some cases. And this was on 40m on the big 5 element quad on a 58 meter catenary fixed on Europe. Some REALLY loud Eu signals on that antenna. Yes, I too can get NB artifacts with extremely loud in-band signals. But the biggie I care about is killing the key clicks. That's worth the price of the radio all by itself. 73 GL, Guy On Sun, May 13, 2012 at 3:53 PM, Arie Kleingeld PA3A p...@xs4all.nl wrote: Guy, Well, both NBs create artifacts if pushed to hard. I have not encountered any problems when using this config (DSP x-3 and IF med-3). If I run any of the two NBs on x-7 it really becomes bad. But your advice inspires me to experiment again. 73 Arie PA3A Op 13-5-2012 15:16, Guy Olinger K2AV schreef: For taking care of key clicks, NB LEVEL set to DSP t1-7 or t2-7 and IF *OFF* is best. I got excellent results with the milder t1-7 in 4.51. IF ON is traditional IF blanking with all the traditional artifacts. Kept on the K3 because it's still best for some kinds of noise. Traditional IF blanking in anyone's RX still will create lots of artifacts in a crowded contest band with lots of strong signals, including the K3. 73, Guy. __ 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] MCU 4.51
When AGC THR and AGC SLP are changed in the CONFIG menu, are the settings changed for the KRX3 also or are there other steps? Thanks. Roy W4WFB __ 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] MCU 4.51
I seem to have missed the 4.51 release, though I got 4.50. Would someone mind forwarding it over? Matt NQ6N On May 11, 2012, at 10:37 PM, Gary Gregory garyvk...@gmail.com wrote: *Toby, Same results here. Gary * On 12 May 2012 13:55, Toby Pennington toby...@embarqmail.com wrote: I don't know what others have been experiencing using the new 4.51 firmware version, but I really think it is an improvement. I have been listening to pileups tonight on 20 meters and cannot discern any mushy weak cw signals, signals are crisp and easily readable. Maybe I need bigger pileups to get a better handle on this aspect, or certain band conditions. I run the threshold at 14 and the AGC SLP is set to 000. The Noise Blanker is improved. I was able to get rid of s7 line noise, and no distortion in the audio of the received signal. NB settings are dsp T2-4, and the IF is NAR 4. So, the noise is being eliminatd with low setting of the NB. I suppose the real test will be when I hear s9 plus line noise which I frequently get here. AF Gain is set to LO in the config menu and have plenty of nice and crisp audio. I am listening to SSB on 80 meters now and have the RF gain set to about 9:00 and AF gain about 12 oclock. Just lots of gain and audio. I think 4.51 is ready to go BETA. What do others who are using 4.51 think? Toby W4CAK __ 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 -- Gary VK4FD - Motorhome Mobile Elecraft Equipment K3 #679, KPA-500 #018 Living the dream!!! __ 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] MCU 4.51
I have also missed the 4.51, and even the 4.50 release. The only beta file I can find on the FTP site is 4.48, but 4.48 has also been officially released. Has the FTP folder for beta releases been changed? David G4DMP In a recent message, Matt Murphy m...@nq6n.com writes I seem to have missed the 4.51 release, though I got 4.50. Would someone mind forwarding it over? Matt NQ6N -- + - - - - - - - - - - - - - - - - + | David M Pratt, Kippax, Leeds. | | Website: http://www.g4dmp.co.uk | + - - - - - - - - - - - - - - - - + __ 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] MCU 4.51
Mike, you could be correct. This morning I seem to have a little distortion in the NB which I did not notice before. It's not bad, but a little is there. I may go back to 4.50 just to check it out. Toby W4CAk I just got it tonight. I have not had much chance to compare but the NB in 4.50 is much better! A curious unexpected side effect! Mike W0MU __ 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] MCU 4.51
I can't really tell if there is an improvement due to the new log algorithms but I really like the extended Threshold adjustment range. I typically listen to CW on a wide filter setting and used to have my AGC at Threshold 8 and Slope 0. Now I have Threshold at 15 and thinking I should flatten the Slope at this point; currently set at 5, but I'm still playing around with it. Possibly could go even flatter. I don't use the NB enough to notice a difference. I was already quite happy with the NB action on CW. It has always worked when I needed it. Possible minor feature suggestion: I was thinking that it would be convenient to have the Threshold numbers coorespond directly to the meter S-units (i.e., a threshold adjustment range of 0 to 9). But I'm uncertain if I'd want to give up the finer granularity of the current 0-20 range for the ability to directly set the AGC point according to the s-meter. I guess I'd have to try it both ways. Anyhow, I really like the improvements. I always thought it was a major limitation to only be able to set the AGC point up to about S-4 or so. 73, Drew AF2Z On Fri, 11 May 2012 20:55:44 -0700, Toby W4CAK wrote: I don't know what others have been experiencing using the new 4.51 firmware version, but I really think it is an improvement. I have been listening to pileups tonight on 20 meters and cannot discern any mushy weak cw signals, signals are crisp and easily readable. Maybe I need bigger pileups to get a better handle on this aspect, or certain band conditions. I run the threshold at 14 and the AGC SLP is set to 000. The Noise Blanker is improved. I was able to get rid of s7 line noise, and no distortion in the audio of the received signal. NB settings are dsp T2-4, and the IF is NAR 4. So, the noise is being eliminatd with low setting of the NB. I suppose the real test will be when I hear s9 plus line noise which I frequently get here. AF Gain is set to LO in the config menu and have plenty of nice and crisp audio. I am listening to SSB on 80 meters now and have the RF gain set to about 9:00 and AF gain about 12 oclock. Just lots of gain and audio. I think 4.51 is ready to go BETA. What do others who are using 4.51 think? Toby W4CAK __ 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] MCU 4.51
Yesterday I wrote NB settings are dsp T2-4 and IF NAR 4 After playing some more with this I think that a DSP setting of T2-2 may be better as far as audio distortion is concerned. It may depend on conditions, and finding the perfect setting for all conditions may be impossible. Toby W4CAK __ 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] MCU 4.51 NB
I did not mean to imply that the NB had changed from 4.50 to 4.51. My comment was from 4.48 to 4.5X. I can see how you read it differently though. I have not noticed a change in the NB from .50 to .51 Mike W0MU W0MU-1 CC Cluster w0mu.net On 5/12/2012 6:30 AM, Toby Pennington wrote: Mike, you could be correct. This morning I seem to have a little distortion in the NB which I did not notice before. It's not bad, but a little is there. I may go back to 4.50 just to check it out. Toby W4CAk I just got it tonight. I have not had much chance to compare but the NB in 4.50 is much better! A curious unexpected side effect! Mike W0MU __ 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] MCU 4.51 NB
Was v4.51 sent to the 4.50 testers? If so, I missed it. The major difference I've noticed with 4.50 is that cw signals, especially the low level ones, now seem much cleaner. 73, Ted W4NZ -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net]On Behalf Of W0MU Mike Fatchett Sent: Saturday, May 12, 2012 11:22 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] MCU 4.51 NB I did not mean to imply that the NB had changed from 4.50 to 4.51. My comment was from 4.48 to 4.5X. I can see how you read it differently though. I have not noticed a change in the NB from .50 to .51 Mike W0MU W0MU-1 CC Cluster w0mu.net On 5/12/2012 6:30 AM, Toby Pennington wrote: Mike, you could be correct. This morning I seem to have a little distortion in the NB which I did not notice before. It's not bad, but a little is there. I may go back to 4.50 just to check it out. Toby W4CAk I just got it tonight. I have not had much chance to compare but the NB in 4.50 is much better! A curious unexpected side effect! Mike W0MU __ 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] MCU 4.51 NB
I too received 4.50 but not 4.51 73 Dave wo2x Sent from my iPhone On May 12, 2012, at 12:17 PM, Ted Bryant w...@comcast.net wrote: Was v4.51 sent to the 4.50 testers? If so, I missed it. The major difference I've noticed with 4.50 is that cw signals, especially the low level ones, now seem much cleaner. 73, Ted W4NZ -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net]On Behalf Of W0MU Mike Fatchett Sent: Saturday, May 12, 2012 11:22 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] MCU 4.51 NB I did not mean to imply that the NB had changed from 4.50 to 4.51. My comment was from 4.48 to 4.5X. I can see how you read it differently though. I have not noticed a change in the NB from .50 to .51 Mike W0MU W0MU-1 CC Cluster w0mu.net On 5/12/2012 6:30 AM, Toby Pennington wrote: Mike, you could be correct. This morning I seem to have a little distortion in the NB which I did not notice before. It's not bad, but a little is there. I may go back to 4.50 just to check it out. Toby W4CAk I just got it tonight. I have not had much chance to compare but the NB in 4.50 is much better! A curious unexpected side effect! Mike W0MU __ 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] MCU 4.51 NB
On 5/12/2012 12:17 PM, Ted Bryant wrote: Was v4.51 sent to the 4.50 testers? Apparently not all (I had to request it). I've been doing some crude testing ... with 4.51 AGC THR = 15 is approximately -73 dBm/S9 (to the best of my ability to measure with the XG3 and step attenuator). With high values for AGC THR it is important to use higher values of AGC SLP otherwise a sudden very strong signal will drive the audio amp and/or headphone amp into severe distortion - particularly if the AF Gain is high. I'm finding AGC THR in the 12/13 range and SLP in the 8/10 range is very comfortable and seems to open up the K3 receiver. The only problem is that my poor antennas don't given me enough strong signals to really evaluate strong signal pile-up with off air signals at the higher thresholds. 73, ... Joe, W4TV On 5/12/2012 12:17 PM, Ted Bryant wrote: Was v4.51 sent to the 4.50 testers? If so, I missed it. The major difference I've noticed with 4.50 is that cw signals, especially the low level ones, now seem much cleaner. 73, Ted W4NZ -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net]On Behalf Of W0MU Mike Fatchett Sent: Saturday, May 12, 2012 11:22 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] MCU 4.51 NB I did not mean to imply that the NB had changed from 4.50 to 4.51. My comment was from 4.48 to 4.5X. I can see how you read it differently though. I have not noticed a change in the NB from .50 to .51 Mike W0MU W0MU-1 CC Cluster w0mu.net On 5/12/2012 6:30 AM, Toby Pennington wrote: Mike, you could be correct. This morning I seem to have a little distortion in the NB which I did not notice before. It's not bad, but a little is there. I may go back to 4.50 just to check it out. Toby W4CAk I just got it tonight. I have not had much chance to compare but the NB in 4.50 is much better! A curious unexpected side effect! Mike W0MU __ 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] MCU 4.51 NB
Same here. Lower level CW signals are much clearer and not nearly so mushy in crowded conditions. I received 4.50 but haven't received 4.51. Would like to try it out as well. 73, Charles, K4ZRJ On May 12, 2012, at 12:17 PM, Ted Bryant wrote: Was v4.51 sent to the 4.50 testers? If so, I missed it. The major difference I've noticed with 4.50 is that cw signals, especially the low level ones, now seem much cleaner. 73, Ted W4NZ -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net]On Behalf Of W0MU Mike Fatchett Sent: Saturday, May 12, 2012 11:22 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] MCU 4.51 NB I did not mean to imply that the NB had changed from 4.50 to 4.51. My comment was from 4.48 to 4.5X. I can see how you read it differently though. I have not noticed a change in the NB from .50 to .51 Mike W0MU W0MU-1 CC Cluster w0mu.net On 5/12/2012 6:30 AM, Toby Pennington wrote: Mike, you could be correct. This morning I seem to have a little distortion in the NB which I did not notice before. It's not bad, but a little is there. I may go back to 4.50 just to check it out. Toby W4CAk I just got it tonight. I have not had much chance to compare but the NB in 4.50 is much better! A curious unexpected side effect! Mike W0MU __ 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] MCU 4.51 NB
I'm not a fan of NR, however since it's back in 4.51, I decided to try it again. I thought some of the NR settings appeared to be excessive, to the point of eliminating the signal I'm trying to listen to. But then I remembered that finding the best NR setting takes time (it's not instant). Setting NR F4-4 on CW with a relatively strong signal is amazing. At first it seems as if the audio has been turned down completely as the background noise disappears; but when the CW signal comes back, it's nice and crisp and at a good audio level. This is with AGC THR at 16 and SLP at 9. The not so good news: there is a 'thud' heard on CW mode when the AGC THR is increased starting at 15 up to 20, and then from 20 down to 15; regardless of the SLP setting. On SSB it's more of a 'swoosh' sound. This could have something to do with the receive equalizer as it doesn't occur in TX DATA mode where it is bypassed. Was it there before? 73 de Sebastian, W4AS __ 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] MCU 4.51
If the adjustment allows half steps, e.g. 0, 0.5, 1, ... 8.5, 9; then you would have about as many steps and still have some vague relation to S units. Cheers - Bill, AE6JV On 5/12/12 at 5:43, drew...@verizon.net (drewko) wrote: Possible minor feature suggestion: I was thinking that it would be convenient to have the Threshold numbers coorespond directly to the meter S-units (i.e., a threshold adjustment range of 0 to 9). But I'm uncertain if I'd want to give up the finer granularity of the current 0-20 range for the ability to directly set the AGC point according to the s-meter. I guess I'd have to try it both ways. --- Bill Frantz|The nice thing about standards| Periwinkle (408)356-8506 |is there are so many to choose| 16345 Englewood Ave www.pwpconsult.com |from. - Andrew Tanenbaum| Los Gatos, CA 95032 __ 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] MCU 4.51 NB
Sebastian, The AGC threshold is something the typical operator will rarely change. We didn't make any effort to eliminate switching artifacts as you change the menu parameter, though we could if it turns out to be an issue. 73, Wayne N6KR On May 12, 2012, at 11:30 AM, Sebastian, W4AS wrote: I'm not a fan of NR, however since it's back in 4.51, I decided to try it again. I thought some of the NR settings appeared to be excessive, to the point of eliminating the signal I'm trying to listen to. But then I remembered that finding the best NR setting takes time (it's not instant). Setting NR F4-4 on CW with a relatively strong signal is amazing. At first it seems as if the audio has been turned down completely as the background noise disappears; but when the CW signal comes back, it's nice and crisp and at a good audio level. This is with AGC THR at 16 and SLP at 9. The not so good news: there is a 'thud' heard on CW mode when the AGC THR is increased starting at 15 up to 20, and then from 20 down to 15; regardless of the SLP setting. On SSB it's more of a 'swoosh' sound. This could have something to do with the receive equalizer as it doesn't occur in TX DATA mode where it is bypassed. Was it there before? 73 de Sebastian, W4AS __ 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] MCU 4.51 NB
Would it help the tests to engage the pre-amp? ie make things more challenging. David G3UNA On 12/05/2012 17:22, Joe Subich, W4TV wrote: On 5/12/2012 12:17 PM, Ted Bryant wrote: Was v4.51 sent to the 4.50 testers? Apparently not all (I had to request it). I've been doing some crude testing ... with 4.51 AGC THR = 15 is approximately -73 dBm/S9 (to the best of my ability to measure with the XG3 and step attenuator). With high values for AGC THR it is important to use higher values of AGC SLP otherwise a sudden very strong signal will drive the audio amp and/or headphone amp into severe distortion - particularly if the AF Gain is high. I'm finding AGC THR in the 12/13 range and SLP in the 8/10 range is very comfortable and seems to open up the K3 receiver. The only problem is that my poor antennas don't given me enough strong signals to really evaluate strong signal pile-up with off air signals at the higher thresholds. 73, ... Joe, W4TV On 5/12/2012 12:17 PM, Ted Bryant wrote: Was v4.51 sent to the 4.50 testers? If so, I missed it. The major difference I've noticed with 4.50 is that cw signals, especially the low level ones, now seem much cleaner. 73, Ted W4NZ -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net]On Behalf Of W0MU Mike Fatchett Sent: Saturday, May 12, 2012 11:22 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] MCU 4.51 NB I did not mean to imply that the NB had changed from 4.50 to 4.51. My comment was from 4.48 to 4.5X. I can see how you read it differently though. I have not noticed a change in the NB from .50 to .51 Mike W0MU W0MU-1 CC Cluster w0mu.net On 5/12/2012 6:30 AM, Toby Pennington wrote: Mike, you could be correct. This morning I seem to have a little distortion in the NB which I did not notice before. It's not bad, but a little is there. I may go back to 4.50 just to check it out. Toby W4CAk I just got it tonight. I have not had much chance to compare but the NB in 4.50 is much better! A curious unexpected side effect! Mike W0MU __ 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 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] MCU 4.51 NB
I fail to see any advantage to turning on the preamp when it is not needed. If you can hear the atmospheric noise without the preamp, leave it off (if the noise level increases when the antenna is attached, you have enough gain). By extension, if you can still hear the atmospheric noise with the attenuator in, leave it in - using more front end gain than is necessary for the band and antenna conditions will only reduce the dynamic range of the receiver. If you do not know what that means in terms of operating, let me put it simply - you may not hear that weak one that you would have heard if you had set the preamp and attenuator properly. Technical discussion - the band noise is S-3 with the preamp off. The K3 will start to overload on a signal that is S9+70, and will hear signals that are greater than the S-3 band noise level. Turn the preamp on, and the band noise raises to about S-5, but the K3 overloads on that signal that is now S9+70, so you can now only hear between S5 and S9+70 where before you could hear between S3 and S9+70. You have reduced the dynamic range by turning on the preamp when it was not needed. BTW - The S9+70 overload point I used was just an example off the top of my head - I do not have the overload point for the K3 at handy reference, so use that as a for instance rather than as an absolute data point. (also BTW - my overload term is technically referred to as the compression point). 73, Don W3FPR On 5/12/2012 6:56 PM, David Cutter wrote: Would it help the tests to engage the pre-amp? ie make things more challenging. David G3UNA On 12/05/2012 17:22, Joe Subich, W4TV wrote: On 5/12/2012 12:17 PM, Ted Bryant wrote: Was v4.51 sent to the 4.50 testers? Apparently not all (I had to request it). I've been doing some crude testing ... with 4.51 AGC THR = 15 is approximately -73 dBm/S9 (to the best of my ability to measure with the XG3 and step attenuator). With high values for AGC THR it is important to use higher values of AGC SLP otherwise a sudden very strong signal will drive the audio amp and/or headphone amp into severe distortion - particularly if the AF Gain is high. I'm finding AGC THR in the 12/13 range and SLP in the 8/10 range is very comfortable and seems to open up the K3 receiver. The only problem is that my poor antennas don't given me enough strong signals to really evaluate strong signal pile-up with off air signals at the higher thresholds. 73, ... Joe, W4TV __ 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] MCU 4.51
I don't know what others have been experiencing using the new 4.51 firmware version, but I really think it is an improvement. I have been listening to pileups tonight on 20 meters and cannot discern any mushy weak cw signals, signals are crisp and easily readable. Maybe I need bigger pileups to get a better handle on this aspect, or certain band conditions. I run the threshold at 14 and the AGC SLP is set to 000. The Noise Blanker is improved. I was able to get rid of s7 line noise, and no distortion in the audio of the received signal. NB settings are dsp T2-4, and the IF is NAR 4. So, the noise is being eliminatd with low setting of the NB. I suppose the real test will be when I hear s9 plus line noise which I frequently get here. AF Gain is set to LO in the config menu and have plenty of nice and crisp audio. I am listening to SSB on 80 meters now and have the RF gain set to about 9:00 and AF gain about 12 oclock. Just lots of gain and audio. I think 4.51 is ready to go BETA. What do others who are using 4.51 think? Toby W4CAK __ 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] MCU 4.51
I just got it tonight. I have not had much chance to compare but the NB in 4.50 is much better! A curious unexpected side effect! Mike W0MU W0MU-1 CC Cluster w0mu.net On 5/11/2012 9:55 PM, Toby Pennington wrote: I don't know what others have been experiencing using the new 4.51 firmware version, but I really think it is an improvement. I have been listening to pileups tonight on 20 meters and cannot discern any mushy weak cw signals, signals are crisp and easily readable. Maybe I need bigger pileups to get a better handle on this aspect, or certain band conditions. I run the threshold at 14 and the AGC SLP is set to 000. The Noise Blanker is improved. I was able to get rid of s7 line noise, and no distortion in the audio of the received signal. NB settings are dsp T2-4, and the IF is NAR 4. So, the noise is being eliminatd with low setting of the NB. I suppose the real test will be when I hear s9 plus line noise which I frequently get here. AF Gain is set to LO in the config menu and have plenty of nice and crisp audio. I am listening to SSB on 80 meters now and have the RF gain set to about 9:00 and AF gain about 12 oclock. Just lots of gain and audio. I think 4.51 is ready to go BETA. What do others who are using 4.51 think? Toby W4CAK __ 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] MCU 4.51
*Toby, Same results here. Gary * On 12 May 2012 13:55, Toby Pennington toby...@embarqmail.com wrote: I don't know what others have been experiencing using the new 4.51 firmware version, but I really think it is an improvement. I have been listening to pileups tonight on 20 meters and cannot discern any mushy weak cw signals, signals are crisp and easily readable. Maybe I need bigger pileups to get a better handle on this aspect, or certain band conditions. I run the threshold at 14 and the AGC SLP is set to 000. The Noise Blanker is improved. I was able to get rid of s7 line noise, and no distortion in the audio of the received signal. NB settings are dsp T2-4, and the IF is NAR 4. So, the noise is being eliminatd with low setting of the NB. I suppose the real test will be when I hear s9 plus line noise which I frequently get here. AF Gain is set to LO in the config menu and have plenty of nice and crisp audio. I am listening to SSB on 80 meters now and have the RF gain set to about 9:00 and AF gain about 12 oclock. Just lots of gain and audio. I think 4.51 is ready to go BETA. What do others who are using 4.51 think? Toby W4CAK __ 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 -- Gary VK4FD - Motorhome Mobile Elecraft Equipment K3 #679, KPA-500 #018 Living the dream!!! __ 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
