Rear Mike Jack Question
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Recently, I began trying to use the rear microphone jack on my K3 with
my Yamaha boom mike, instead of using a stand-alone USB sound card and feeding the signal to the LIN IN jack. This worked fine for a couple of weeks, but today when I tried it, I got very loud white noise driving my radio and amp essentially to full scale. I have MIC SEL set to RPH BIAS, which has worked in the past. Any MIC gain setting over 7 drives the amp to full output. When I pull the mike plug out of the jack, the problem goes away. Have I inadvertently messed up another setting, or perhaps a failure in the mike? -- 73, Pete N4ZR Check out the Reverse Beacon Network at <http://reversebeacon.net>, now spotting RTTY activity worldwide. For spots, please use your favorite "retail" DX cluster. ______________________________________________________________ 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 Message delivered to [hidden email] |
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I would suspect a Windoze update scrambled your sound assignments. Go
back and check all your settings. k4ia, Buck K3s# 11497 Honor Roll 8B DXCC EasyWayHamBooks.com On 8/23/2020 11:56 AM, N4ZR wrote: > Recently, I began trying to use the rear microphone jack on my K3 with > my Yamaha boom mike, instead of using a stand-alone USB sound card and > feeding the signal to the LIN IN jack. This worked fine for a couple of > weeks, but today when I tried it, I got very loud white noise driving my > radio and amp essentially to full scale. I have MIC SEL set to RPH BIAS, > which has worked in the past. Any MIC gain setting over 7 drives the amp > to full output. When I pull the mike plug out of the jack, the problem > goes away. > > Have I inadvertently messed up another setting, or perhaps a failure in > the mike? > 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 Message delivered to [hidden email] |
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In reply to this post by N4ZR
Set MIC SEL to RPL BIAS. You do not need the high gain amp with that
mic. It is likely producing feedback as you have it set. 73, Don W3FPR On 8/23/2020 11:56 AM, N4ZR wrote: > Recently, I began trying to use the rear microphone jack on my K3 with > my Yamaha boom mike, instead of using a stand-alone USB sound card and > feeding the signal to the LIN IN jack. This worked fine for a couple of > weeks, but today when I tried it, I got very loud white noise driving my > radio and amp essentially to full scale. I have MIC SEL set to RPH BIAS, > which has worked in the past. Any MIC gain setting over 7 drives the amp > to full output. When I pull the mike plug out of the jack, the problem > goes away. > ______________________________________________________________ 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 Message delivered to [hidden email] |
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In reply to this post by N4ZR
Hi,
Sounds a bit like RF getting into the mic line. Does it happen when running into a dummy load? I use a Koss headset like this with no problems. Andrew G8BYB -----Original Message----- From: [hidden email] <[hidden email]> On Behalf Of N4ZR Sent: 23 August 2020 16:57 To: Elecraft List <[hidden email]> Subject: [Elecraft] Rear Mike Jack Question Recently, I began trying to use the rear microphone jack on my K3 with my Yamaha boom mike, instead of using a stand-alone USB sound card and feeding the signal to the LIN IN jack. This worked fine for a couple of weeks, but today when I tried it, I got very loud white noise driving my radio and amp essentially to full scale. I have MIC SEL set to RPH BIAS, which has worked in the past. Any MIC gain setting over 7 drives the amp to full output. When I pull the mike plug out of the jack, the problem goes away. Have I inadvertently messed up another setting, or perhaps a failure in the mike? -- 73, Pete N4ZR Check out the Reverse Beacon Network at <http://reversebeacon.net>, now spotting RTTY activity worldwide. For spots, please use your favorite "retail" DX cluster. ______________________________________________________________ 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 Message delivered to [hidden email] ______________________________________________________________ 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 Message delivered to [hidden email] |
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In reply to this post by Buck
This just happened to me. I heard a screeching whine when hitting
transmit in ft8, turns out the recent update reset all my sound assignments. 73 On 8/23/2020 11:01 AM, Buck wrote: > I would suspect a Windoze update scrambled your sound assignments. Go > back and check all your settings. > > k4ia, Buck > K3s# 11497 > Honor Roll 8B DXCC > EasyWayHamBooks.com > > On 8/23/2020 11:56 AM, N4ZR wrote: >> Recently, I began trying to use the rear microphone jack on my K3 >> with my Yamaha boom mike, instead of using a stand-alone USB sound >> card and feeding the signal to the LIN IN jack. This worked fine for >> a couple of weeks, but today when I tried it, I got very loud white >> noise driving my radio and amp essentially to full scale. I have MIC >> SEL set to RPH BIAS, which has worked in the past. Any MIC gain >> setting over 7 drives the amp to full output. When I pull the mike >> plug out of the jack, the problem goes away. >> >> Have I inadvertently messed up another setting, or perhaps a failure >> in the mike? >> > ______________________________________________________________ > 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 > Message delivered to [hidden email] -- Dave Erickson k0dom 73 ______________________________________________________________ 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 Message delivered to [hidden email] |
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A CM-500 does not need RPH bias mic settings it is a high output element and RPL bias will do fine with mic gain beteeen 10-20 (I use 17).
Sent from my iPhone ...nr4c. bill > On Aug 23, 2020, at 1:19 PM, Dave Erickson <[hidden email]> wrote: > > This just happened to me. I heard a screeching whine when hitting transmit in ft8, turns out the recent update reset all my sound assignments. > > 73 > >> On 8/23/2020 11:01 AM, Buck wrote: >> I would suspect a Windoze update scrambled your sound assignments. Go back and check all your settings. >> >> k4ia, Buck >> K3s# 11497 >> Honor Roll 8B DXCC >> EasyWayHamBooks.com >> >>> On 8/23/2020 11:56 AM, N4ZR wrote: >>> Recently, I began trying to use the rear microphone jack on my K3 with my Yamaha boom mike, instead of using a stand-alone USB sound card and feeding the signal to the LIN IN jack. This worked fine for a couple of weeks, but today when I tried it, I got very loud white noise driving my radio and amp essentially to full scale. I have MIC SEL set to RPH BIAS, which has worked in the past. Any MIC gain setting over 7 drives the amp to full output. When I pull the mike plug out of the jack, the problem goes away. >>> >>> Have I inadvertently messed up another setting, or perhaps a failure in the mike? >>> >> ______________________________________________________________ >> 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 >> Message delivered to [hidden email] > > -- > Dave Erickson > k0dom > 73 > > ______________________________________________________________ > 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 > Message delivered to [hidden email] 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 Message delivered to [hidden email] |
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In reply to this post by Don Wilhelm
Egads, who knew? Clearly not me. Of course, my K3 is relatively early,
and I didn't download the latest manual until this year. Thanks, Don! Check out the Reverse Beacon Network at <http://reversebeacon.net>, now spotting RTTY activity worldwide. For spots, please use your favorite "retail" DX cluster. On 8/23/2020 11:30 PM, Don Wilhelm wrote: > Pete, > > Go to the MIC SEL menu and tap 1 to toggle between the high gain mic > preamp and the low gain. > See page 52 of a more recent manual. > > 73, > Don W3FPR > > On 8/23/2020 9:55 PM, N4ZR wrote: >> >> Don, I do not have a RPL bias option under Mic Sel. Only RPH, FPH >> and Line IN >> >> 73, Pete N4ZR >> Check out the Reverse Beacon Network >> at<http://reversebeacon.net>, now >> spotting RTTY activity worldwide. >> For spots, please use your favorite >> "retail" DX cluster. >> On 8/23/2020 12:41 PM, Don Wilhelm wrote: >>> Set MIC SEL to RPL BIAS. You do not need the high gain amp with >>> that mic. It is likely producing feedback as you have it set. >>> >>> 73, >>> Don W3FPR >>> >>> On 8/23/2020 11:56 AM, N4ZR wrote: >>>> Recently, I began trying to use the rear microphone jack on my K3 >>>> with my Yamaha boom mike, instead of using a stand-alone USB sound >>>> card and feeding the signal to the LIN IN jack. This worked fine >>>> for a couple of weeks, but today when I tried it, I got very loud >>>> white noise driving my radio and amp essentially to full scale. I >>>> have MIC SEL set to RPH BIAS, which has worked in the past. Any MIC >>>> gain setting over 7 drives the amp to full output. When I pull the >>>> mike plug out of the jack, the problem goes away. >>>> > 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 Message delivered to [hidden email] |
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On a semi-related note, I don't understand why manufacturers continue to put
a mic jack, with its overly bulky mating connector, on the front panel. It always gets in the way. Barry W21UP -- Sent from: http://elecraft.365791.n2.nabble.com/ ______________________________________________________________ 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 Message delivered to [hidden email] |
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