Re: [Elecraft] KX3 Intermittent changes in audio gain
We're on (anniversary) travel, but found the doc here on the laptop: In Figure 2, take a close look at the KX3's DC power input. The DC to DC converter shown eliminates whatever power impurities remain at this end of the interior DC branch circuit. Being a boost-buck regulator, the converter can accept a wide range of input voltages and produces a steady 13.8VDC (adjustable). The converter used in this example installation is made by QSKJ (model QS-1212CCBA-80W). In addition to cleaning up the DC, the converter reduces voltage sag from the smaller gauge interior wiring. In order to prevent the converter from introducing its own emissions, a Laird LFB174095 ferrite core was used with 3 turns of the KX3's stock cable. This killed all converter emissions. See http://ca.picclick.com/DC-DC-Converter-QS-1212CCBA-80W-Power-Supply-251036051706.html. 73, matt On Fri, 21 Sep 2012 16:24:43 -0700, you wrote: >Any recommendation or specific brand or place to purchase one for a KX3. >Appreciate the sharing of knowledge. > >Thanks, > >Keith >AG6AZ > >Sent from my iPhone please excuse typos > >On Sep 21, 2012, at 4:19 PM, "Matt Zilmer" wrote: > >> Yup. All you have to do is stabilize the power supply at the K3. I >> recommend a DC-DC converter for this. >> >> 73, >> matt W6NIA >> >> On Fri, 21 Sep 2012 14:22:26 -0700, you wrote: >> >>> Matt >>> >>> That's exactly what has happened I saw the high current flash I didn't see >>> it before because I was driving but I just saw it now so I think there's a >>> positive correlation. >>> >>> Thank you very much for the insight! >>> >>> Keith >>> AG6AZ >>> >>> Sent from my iPhone please excuse typos >>> >>> On Sep 21, 2012, at 7:18 AM, "Matt Zilmer" wrote: >>> The KX3 probably detected a HI CUR condition. This can happen because of high (or low) PS voltage due to automotive electrical fluctuations. Sometimes this can happen because of ground current with the antenna connected, so check this for a positive correlation. You should not see HI CUR while on the KX3's internal batteries. This proves the automotive supply is caused it. When the KX3 sees HI CUR (usually something higher than 300 mA on RX), it will flash that HI CUR message on VFO A. If the condition persists, it will drop the AF gain to some predetermined value. If the condition continues beyond that point, the KX3 will shut itself off to protect itself. In my own case, both the AF gain and self-shutdown events were happening. HI CUR is preventable in a mobile setting - see below. I produced a pretty good document on KX3 mobile ops, which I'm about to add to. It's posted on the Elecraft web site at http://www.elecraft.com/K2_Manual_Download_Page.htm#kx3_mobile. Keith, I saw that same type of problem while mobile with KX3 #6 right up until I installed a DC-DC converter. See the doc for details of all that. 73, matt W6NIA KX3 #6, K3 #24, etc. On Fri, 21 Sep 2012 05:45:18 -0700, you wrote: > I had this happen to me during mobile operations and not sure why either. > Signals dropped right out and then when I turned off the radio for a few > minutes and when i turned on the KX3 it went back to where it was prior > and remained that way. > > I will keep an eye on it to see if it happens again. > > Keith > AG6AZ > > Sent from my iPhone please excuse typos > > On Sep 20, 2012, at 7:43 PM, "Kevin Luxford" > wrote: > >> Hi Guys, >> My KX3 has just developed an apparent fault - the audio level changes >> abruptly every few seconds from a comfortable listening level to quiet, >> but still audible. >> >> I am using my Proset headphones. >> >> Any thoughts on where I should start looking? I am nervous about poking >> around surface mount circuits! >> >> vy 73 >> Kevin >> VK3DAP / ZL2DAP >> __ >> 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:El
Re: [Elecraft] KX3 Intermittent changes in audio gain
There is one recommended in that doc I authored - the one posted on the Elecraft manuals section. 73, matt On Fri, 21 Sep 2012 16:24:43 -0700, you wrote: >Any recommendation or specific brand or place to purchase one for a KX3. >Appreciate the sharing of knowledge. > >Thanks, > >Keith >AG6AZ > >Sent from my iPhone please excuse typos > >On Sep 21, 2012, at 4:19 PM, "Matt Zilmer" wrote: > >> Yup. All you have to do is stabilize the power supply at the K3. I >> recommend a DC-DC converter for this. >> >> 73, >> matt W6NIA >> >> On Fri, 21 Sep 2012 14:22:26 -0700, you wrote: >> >>> Matt >>> >>> That's exactly what has happened I saw the high current flash I didn't see >>> it before because I was driving but I just saw it now so I think there's a >>> positive correlation. >>> >>> Thank you very much for the insight! >>> >>> Keith >>> AG6AZ >>> >>> Sent from my iPhone please excuse typos >>> >>> On Sep 21, 2012, at 7:18 AM, "Matt Zilmer" wrote: >>> The KX3 probably detected a HI CUR condition. This can happen because of high (or low) PS voltage due to automotive electrical fluctuations. Sometimes this can happen because of ground current with the antenna connected, so check this for a positive correlation. You should not see HI CUR while on the KX3's internal batteries. This proves the automotive supply is caused it. When the KX3 sees HI CUR (usually something higher than 300 mA on RX), it will flash that HI CUR message on VFO A. If the condition persists, it will drop the AF gain to some predetermined value. If the condition continues beyond that point, the KX3 will shut itself off to protect itself. In my own case, both the AF gain and self-shutdown events were happening. HI CUR is preventable in a mobile setting - see below. I produced a pretty good document on KX3 mobile ops, which I'm about to add to. It's posted on the Elecraft web site at http://www.elecraft.com/K2_Manual_Download_Page.htm#kx3_mobile. Keith, I saw that same type of problem while mobile with KX3 #6 right up until I installed a DC-DC converter. See the doc for details of all that. 73, matt W6NIA KX3 #6, K3 #24, etc. On Fri, 21 Sep 2012 05:45:18 -0700, you wrote: > I had this happen to me during mobile operations and not sure why either. > Signals dropped right out and then when I turned off the radio for a few > minutes and when i turned on the KX3 it went back to where it was prior > and remained that way. > > I will keep an eye on it to see if it happens again. > > Keith > AG6AZ > > Sent from my iPhone please excuse typos > > On Sep 20, 2012, at 7:43 PM, "Kevin Luxford" > wrote: > >> Hi Guys, >> My KX3 has just developed an apparent fault - the audio level changes >> abruptly every few seconds from a comfortable listening level to quiet, >> but still audible. >> >> I am using my Proset headphones. >> >> Any thoughts on where I should start looking? I am nervous about poking >> around surface mount circuits! >> >> vy 73 >> Kevin >> VK3DAP / ZL2DAP >> __ >> 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] KX3 Intermittent changes in audio gain
Any recommendation or specific brand or place to purchase one for a KX3. Appreciate the sharing of knowledge. Thanks, Keith AG6AZ Sent from my iPhone please excuse typos On Sep 21, 2012, at 4:19 PM, "Matt Zilmer" wrote: > Yup. All you have to do is stabilize the power supply at the K3. I > recommend a DC-DC converter for this. > > 73, > matt W6NIA > > On Fri, 21 Sep 2012 14:22:26 -0700, you wrote: > >> Matt >> >> That's exactly what has happened I saw the high current flash I didn't see >> it before because I was driving but I just saw it now so I think there's a >> positive correlation. >> >> Thank you very much for the insight! >> >> Keith >> AG6AZ >> >> Sent from my iPhone please excuse typos >> >> On Sep 21, 2012, at 7:18 AM, "Matt Zilmer" wrote: >> >>> The KX3 probably detected a HI CUR condition. This can happen because >>> of high (or low) PS voltage due to automotive electrical fluctuations. >>> Sometimes this can happen because of ground current with the antenna >>> connected, so check this for a positive correlation. >>> >>> You should not see HI CUR while on the KX3's internal batteries. This >>> proves the automotive supply is caused it. >>> >>> When the KX3 sees HI CUR (usually something higher than 300 mA on RX), >>> it will flash that HI CUR message on VFO A. If the condition >>> persists, it will drop the AF gain to some predetermined value. If >>> the condition continues beyond that point, the KX3 will shut itself >>> off to protect itself. In my own case, both the AF gain and >>> self-shutdown events were happening. HI CUR is preventable in a >>> mobile setting - see below. >>> >>> I produced a pretty good document on KX3 mobile ops, which I'm about >>> to add to. It's posted on the Elecraft web site at >>> http://www.elecraft.com/K2_Manual_Download_Page.htm#kx3_mobile. >>> >>> Keith, I saw that same type of problem while mobile with KX3 #6 right >>> up until I installed a DC-DC converter. See the doc for details of >>> all that. >>> >>> 73, >>> matt W6NIA >>> KX3 #6, K3 #24, etc. >>> >>> On Fri, 21 Sep 2012 05:45:18 -0700, you wrote: >>> I had this happen to me during mobile operations and not sure why either. Signals dropped right out and then when I turned off the radio for a few minutes and when i turned on the KX3 it went back to where it was prior and remained that way. I will keep an eye on it to see if it happens again. Keith AG6AZ Sent from my iPhone please excuse typos On Sep 20, 2012, at 7:43 PM, "Kevin Luxford" wrote: > Hi Guys, > My KX3 has just developed an apparent fault - the audio level changes > abruptly every few seconds from a comfortable listening level to quiet, > but still audible. > > I am using my Proset headphones. > > Any thoughts on where I should start looking? I am nervous about poking > around surface mount circuits! > > vy 73 > Kevin > VK3DAP / ZL2DAP > __ > 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] KX3 Intermittent changes in audio gain
Yup. All you have to do is stabilize the power supply at the K3. I recommend a DC-DC converter for this. 73, matt W6NIA On Fri, 21 Sep 2012 14:22:26 -0700, you wrote: >Matt > >That's exactly what has happened I saw the high current flash I didn't see it >before because I was driving but I just saw it now so I think there's a >positive correlation. > >Thank you very much for the insight! > >Keith >AG6AZ > >Sent from my iPhone please excuse typos > >On Sep 21, 2012, at 7:18 AM, "Matt Zilmer" wrote: > >> The KX3 probably detected a HI CUR condition. This can happen because >> of high (or low) PS voltage due to automotive electrical fluctuations. >> Sometimes this can happen because of ground current with the antenna >> connected, so check this for a positive correlation. >> >> You should not see HI CUR while on the KX3's internal batteries. This >> proves the automotive supply is caused it. >> >> When the KX3 sees HI CUR (usually something higher than 300 mA on RX), >> it will flash that HI CUR message on VFO A. If the condition >> persists, it will drop the AF gain to some predetermined value. If >> the condition continues beyond that point, the KX3 will shut itself >> off to protect itself. In my own case, both the AF gain and >> self-shutdown events were happening. HI CUR is preventable in a >> mobile setting - see below. >> >> I produced a pretty good document on KX3 mobile ops, which I'm about >> to add to. It's posted on the Elecraft web site at >> http://www.elecraft.com/K2_Manual_Download_Page.htm#kx3_mobile. >> >> Keith, I saw that same type of problem while mobile with KX3 #6 right >> up until I installed a DC-DC converter. See the doc for details of >> all that. >> >> 73, >> matt W6NIA >> KX3 #6, K3 #24, etc. >> >> On Fri, 21 Sep 2012 05:45:18 -0700, you wrote: >> >>> I had this happen to me during mobile operations and not sure why either. >>> Signals dropped right out and then when I turned off the radio for a few >>> minutes and when i turned on the KX3 it went back to where it was prior >>> and remained that way. >>> >>> I will keep an eye on it to see if it happens again. >>> >>> Keith >>> AG6AZ >>> >>> Sent from my iPhone please excuse typos >>> >>> On Sep 20, 2012, at 7:43 PM, "Kevin Luxford" >>> wrote: >>> Hi Guys, My KX3 has just developed an apparent fault - the audio level changes abruptly every few seconds from a comfortable listening level to quiet, but still audible. I am using my Proset headphones. Any thoughts on where I should start looking? I am nervous about poking around surface mount circuits! vy 73 Kevin VK3DAP / ZL2DAP __ 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] KX3 Intermittent changes in audio gain
Matt That's exactly what has happened I saw the high current flash I didn't see it before because I was driving but I just saw it now so I think there's a positive correlation. Thank you very much for the insight! Keith AG6AZ Sent from my iPhone please excuse typos On Sep 21, 2012, at 7:18 AM, "Matt Zilmer" wrote: > The KX3 probably detected a HI CUR condition. This can happen because > of high (or low) PS voltage due to automotive electrical fluctuations. > Sometimes this can happen because of ground current with the antenna > connected, so check this for a positive correlation. > > You should not see HI CUR while on the KX3's internal batteries. This > proves the automotive supply is caused it. > > When the KX3 sees HI CUR (usually something higher than 300 mA on RX), > it will flash that HI CUR message on VFO A. If the condition > persists, it will drop the AF gain to some predetermined value. If > the condition continues beyond that point, the KX3 will shut itself > off to protect itself. In my own case, both the AF gain and > self-shutdown events were happening. HI CUR is preventable in a > mobile setting - see below. > > I produced a pretty good document on KX3 mobile ops, which I'm about > to add to. It's posted on the Elecraft web site at > http://www.elecraft.com/K2_Manual_Download_Page.htm#kx3_mobile. > > Keith, I saw that same type of problem while mobile with KX3 #6 right > up until I installed a DC-DC converter. See the doc for details of > all that. > > 73, > matt W6NIA > KX3 #6, K3 #24, etc. > > On Fri, 21 Sep 2012 05:45:18 -0700, you wrote: > >> I had this happen to me during mobile operations and not sure why either. >> Signals dropped right out and then when I turned off the radio for a few >> minutes and when i turned on the KX3 it went back to where it was prior and >> remained that way. >> >> I will keep an eye on it to see if it happens again. >> >> Keith >> AG6AZ >> >> Sent from my iPhone please excuse typos >> >> On Sep 20, 2012, at 7:43 PM, "Kevin Luxford" >> wrote: >> >>> Hi Guys, >>> My KX3 has just developed an apparent fault - the audio level changes >>> abruptly every few seconds from a comfortable listening level to quiet, >>> but still audible. >>> >>> I am using my Proset headphones. >>> >>> Any thoughts on where I should start looking? I am nervous about poking >>> around surface mount circuits! >>> >>> vy 73 >>> Kevin >>> VK3DAP / ZL2DAP >>> __ >>> 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] KX3 Intermittent changes in audio gain
The KX3 probably detected a HI CUR condition. This can happen because of high (or low) PS voltage due to automotive electrical fluctuations. Sometimes this can happen because of ground current with the antenna connected, so check this for a positive correlation. You should not see HI CUR while on the KX3's internal batteries. This proves the automotive supply is caused it. When the KX3 sees HI CUR (usually something higher than 300 mA on RX), it will flash that HI CUR message on VFO A. If the condition persists, it will drop the AF gain to some predetermined value. If the condition continues beyond that point, the KX3 will shut itself off to protect itself. In my own case, both the AF gain and self-shutdown events were happening. HI CUR is preventable in a mobile setting - see below. I produced a pretty good document on KX3 mobile ops, which I'm about to add to. It's posted on the Elecraft web site at http://www.elecraft.com/K2_Manual_Download_Page.htm#kx3_mobile. Keith, I saw that same type of problem while mobile with KX3 #6 right up until I installed a DC-DC converter. See the doc for details of all that. 73, matt W6NIA KX3 #6, K3 #24, etc. On Fri, 21 Sep 2012 05:45:18 -0700, you wrote: >I had this happen to me during mobile operations and not sure why either. >Signals dropped right out and then when I turned off the radio for a few >minutes and when i turned on the KX3 it went back to where it was prior and >remained that way. > >I will keep an eye on it to see if it happens again. > >Keith >AG6AZ > >Sent from my iPhone please excuse typos > >On Sep 20, 2012, at 7:43 PM, "Kevin Luxford" wrote: > >> Hi Guys, >> My KX3 has just developed an apparent fault - the audio level changes >> abruptly every few seconds from a comfortable listening level to quiet, >> but still audible. >> >> I am using my Proset headphones. >> >> Any thoughts on where I should start looking? I am nervous about poking >> around surface mount circuits! >> >> vy 73 >> Kevin >> VK3DAP / ZL2DAP >> __ >> 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] KX3 Intermittent changes in audio gain
I had this happen to me during mobile operations and not sure why either. Signals dropped right out and then when I turned off the radio for a few minutes and when i turned on the KX3 it went back to where it was prior and remained that way. I will keep an eye on it to see if it happens again. Keith AG6AZ Sent from my iPhone please excuse typos On Sep 20, 2012, at 7:43 PM, "Kevin Luxford" wrote: > Hi Guys, > My KX3 has just developed an apparent fault - the audio level changes > abruptly every few seconds from a comfortable listening level to quiet, > but still audible. > > I am using my Proset headphones. > > Any thoughts on where I should start looking? I am nervous about poking > around surface mount circuits! > > vy 73 > Kevin > VK3DAP / ZL2DAP > __ > 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] KX3 Intermittent changes in audio gain
Hi Guys, My KX3 has just developed an apparent fault - the audio level changes abruptly every few seconds from a comfortable listening level to quiet, but still audible. I am using my Proset headphones. Any thoughts on where I should start looking? I am nervous about poking around surface mount circuits! vy 73 Kevin VK3DAP / ZL2DAP __ 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
