No one is taking anything personally. It's not the information that bothers me, it's when Joe decides to CHANGE my wording, MISQUOTE me, and then Correct me based on what HE said, not me. I'm all about helping others with the PROPER information.. Not trying to correct others that are trying to be helpful. Now, this is enough of this topic. Thank you for your input. We'll leave it here. This doesn't even belong on the reflector. > Date: Sun, 7 Nov 2010 09:04:35 -0700 > From: xda...@cis-broadband.com > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] APF and audio limiting > > > It's not nit picking when someone corrects your incorrect description. > AGC action seems to be one of the least understood facets of the K3 and > putting bad information out there about it doesn't help. You were wrong > ... Joe is correct. Don't take it personally. > > Dave AB7E > > > > On 11/6/2010 6:12 PM, The Smiths wrote: > > If I said black you would say white. What's the difference. Fine, it's not > > bringing the level UP to the AF Output, it's setting it TO the AF output > > according to the slope setting.. Unless of course the manual is written > > improperly too. Stop being such a nit pick Joe, you don't ALWAYS have to > > correct everyone.. My point is still the same. He heard the loud signal > > LOUD because that's where his AF Output was set to. > > Perhaps you can spend more time helping this person than knocking down > > those that DO try to help others. It would be time better spent. END OF. > > > > Sorry Eric, but I just feel like Joe is out here like a shark circling > > around looking for someone to bite. > > > > > >> Date: Sat, 6 Nov 2010 20:48:14 -0400 > >> From: li...@subich.com > >> To: elecraft@mailman.qth.net > >> Subject: Re: [Elecraft] APF and audio limiting > >> > >> > >>>> Remember, the AGC is only supposed to bring things to the level of > >>>> your AF output setting. > >> No. AGC should never "bring up" the level. AGC *REDUCES* the level of > >> signals above the AGC threshold. One normally sets the audio level for > >> signals *at the AGC threshold* or below and AGC keeps stronger signals > >> from exceeding that level (by the amount of the "slope" if one is not > >> using a "hard" threshold). > >> > >> The difference with an *AUDIO PEAK FILTER* is that the APF is in the > >> AUDIO circuit *AFTER* the detector and *OUTSIDE* the AGC loop. Since > >> the PEAK gain of the K3 APF is roughly 10 dB - see the response here: > >> http://n1eu.com/K3/K3_apf.htm - this can cause an issue with strong > >> signal but is a big advantage with signals at or near the noise level > >> (and below the AGC threshold). Of course, the gain is exactly why APF > >> can be turned on and off ... you don't want it on with strong signals - > >> only with those at the noise signals where it makes a difference! > >> > >> 73, > >> > >> ... Joe, W4TV > >> > >> > >> On 11/6/2010 8:20 PM, The Smiths wrote: > >>> I think that your understanding of the AGC is probably pretty good. I > >>> also think that most people don't know how to set their AGC properly. > >>> Yes, there should have been SOME control over the loudness of the other > >>> signal, but because the Peak filter brings everything up as it does it > >>> can also take an S9 signal and make it sound like an S40 over signal too, > >>> even when the AGC is compressing things.. > >>> > >>> Remember, the AGC is only supposed to bring things to the level of your > >>> AF output setting. Therefore if you have your AF all the way up, well, > >>> that's as loud as the AGC will put it under Sloping conditions.. It > >>> doesn't mean that EVERY weak signal will also be within your AGC > >>> Threshold. What "sounds loud" because of the APF is on doesn't mean that > >>> it's opening your threshold control in the AGC. There in lies your > >>> problem I think.. What you thought was under AGC control, really wasn't!. > >>> What you were actually hearing is proper Dynamic range you should have. > >>> So the volume control still comes into play. > >>> > >>> I'll send you a copy of my AGC tutorial offline. I hope this helps you > >>> out some. > >>> > >>> > >>>> Date: Sat, 6 Nov 2010 19:46:11 -0400 > >>>> From: n...@nf4l.com > >>>> To: elecraft@mailman.qth.net > >>>> Subject: Re: [Elecraft] APF and audio limiting > >>>> > >>>> Thanks Tom. > >>>> > >>>> Well, I kinda thought it shouldn't blast my ears that hard. Audio > >>>> *WASN'T* up too > >>>> loud for the signal I was after. Maybe I don't understand what AGC does. > >>>> That's why I > >>>> asked the questions I did. > >>>> > >>>> On 11/6/2010 6:21 PM, Amateur Radio Operator N5GE wrote: > >>>>> On Sat, 06 Nov 2010 18:04:18 -0400, Mike<n...@nf4l.com> wrote: > >>>>> > >>>>> Sounds normal to me. > >>>>> > >>>>> Audio up too loud and APF on, then a strong signal transmits on the > >>>>> frequency > >>>>> you are listening to.... > >>>>> > >>>>> What do you think it SHOULD have done? You didn't say. > >>>>> > >>>>> Tom > >>>>> Radio Amateur N5GE > >>>>> > >>>>>> On 11/4/2010 9:48 PM, Mike wrote: > >>>>>>> I'm playing with the new APF, and trying to get a REALLY weak QSO to > >>>>>>> pop. I have the > >>>>>>> volume cranked up pretty good, and a REALLY strong station throws in > >>>>>>> their call. I > >>>>>>> thought my speakers had blown. Glad I wasn't wearing cans. > >>>>>>> > >>>>>>> My CONFIG:AF is 18, AGC = F. > >>>>>>> > >>>>>>> Was I doing something wrong? Anybody else experience this? Do we > >>>>>>> need/can we have > >>>>>>> better audio limiting? > >>>>>>> > >>>>>>> 73, Mike NF4L > >>>> > >>>> ______________________________________________________________ > >>>> 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 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
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