K3 Monitor feedback
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Iain MacDonnell - N6ML wrote:
> On Fri, Nov 27, 2009 at 9:24 AM, Mike <[hidden email]> wrote: > >> Hmmm.. >> >> Any voice mode (I don't have FM) I get feedback with MIC+LIN on. Muting >> the Line setting in WIndoze (Mine doesn't say whether it's in or out) >> kills the feedback. Pulling the line-in or line-out doesn't kill the >> feedback. >> >> If the ProSet is laying on top of the rig, there is feedback at all >> settings until I move it. Vox is off, so that indicates that the mic is >> open all the time. Verified that by putting my hand around the mic, >> cupped toward the K3 from a couple of feet away, >> *SQUEEEEEEEEEEEEEELLLLLLLLL*. >> >> I don't understand the audio path, but ti me it seems like a flaw somewhere. >> >> If I didn't like RTTY so much, I could just set MIC+LIN off, and be happy. >> > > You don't need MIC+LIN for RTTY. Just set "MIC SEL" to "line in" when > in "AFSK A" mode, and to whatever you use for a mic when in SSB modes. > The setting is remembered per-mode. > > MIC+LIN is useful for things like SSTV, where you flip back and forth > between audio sources during a single QSO. > > ~Iain / N6ML You saved the day! That works perfectly. Somewhere when I was trying to get set up for RTTY, I thought MIC+LIN had to be on. Old dawg, new trix. That's something to include in the new, obese manual....... 73, Mike NF4L ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by Mike Reublin
Dear Mike,
Maybe you have solved this by now. But, if not, my experience might be helpful. I also noted a sort of rough feedback when listening to the monitor. In my case it was RF feedback. Maybe you have had a rough SSB signal for some time and the monitor just revealed it to you? Anyhow, as Don Wilhelm says, the best thing is to look at your antenna feed situation to try to minimize feedback. In my case, this was effective except on 20 meters. Due to physical constraints that I can't change, my dipole antenna passes about 15 feet above the table with my K3 on it. As it happens, on that one band, there is lots of RF around. Maybe one of the power lines is resonant, don't know. Anyhow, I tried lots of ferrite beads on various lines, which reduced but didn't eliminate the problem. Finally, and this is my suggestion to you, I put a ferrite bead right at the end of the mike boom, just before the mike itself. This killed the RF feedback for me. (This is using the Yamaha CM500 headset that was written about earlier on the reflector.) Evidently the mike element itself is sensitive to RF. Hope you've solved your problem by now. 73, Oliver, W6ODJ On 25 Nov 2009, at 6:01 PM, Mike wrote: > I was playing with ALC and compression settings tonight, and turned on > the monitor function. If I turn it up high enough to hear myself (around > 9), I get a loud BRRRRRRRRRR squeal, that has an echoic component. > Difficult to describe. > > I don't recall hearing that when I first set up the mic. I have V3.63. > > How can I regain use of the monitor? > > Mike NF4L > > To those who celebrate tomorrow, Happy Thanksgiving. > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > 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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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Thanks, Oliver, but it's not RF, it's audio. I was testing in 'test'
mode. The solution was supplied by Iain a couple of posts up. I do have some toroids on order for another problem though. 73, Mike NF4L O. Johns wrote: > Dear Mike, > > Maybe you have solved this by now. But, if not, my experience might be helpful. I also noted a sort of rough feedback when listening to the monitor. In my case it was RF feedback. Maybe you have had a rough SSB signal for some time and the monitor just revealed it to you? > > Anyhow, as Don Wilhelm says, the best thing is to look at your antenna feed situation to try to minimize feedback. In my case, this was effective except on 20 meters. Due to physical constraints that I can't change, my dipole antenna passes about 15 feet above the table with my K3 on it. As it happens, on that one band, there is lots of RF around. Maybe one of the power lines is resonant, don't know. Anyhow, I tried lots of ferrite beads on various lines, which reduced but didn't eliminate the problem. Finally, and this is my suggestion to you, I put a ferrite bead right at the end of the mike boom, just before the mike itself. This killed the RF feedback for me. (This is using the Yamaha CM500 headset that was written about earlier on the reflector.) Evidently the mike element itself is sensitive to RF. > > Hope you've solved your problem by now. > > 73, > Oliver, W6ODJ > > > > On 25 Nov 2009, at 6:01 PM, Mike wrote: > > >> I was playing with ALC and compression settings tonight, and turned on >> the monitor function. If I turn it up high enough to hear myself (around >> 9), I get a loud BRRRRRRRRRR squeal, that has an echoic component. >> Difficult to describe. >> >> I don't recall hearing that when I first set up the mic. I have V3.63. >> >> How can I regain use of the monitor? >> >> Mike NF4L >> >> To those who celebrate tomorrow, Happy Thanksgiving. >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> 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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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