KAT500 Tune Pblms
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Using my K3 and other Radios thru my KAT500 at powers under 100 watts, I have the following problem:
While transmitting at swr's under 1.5, the Tuner will go haywire & try to retune & go into the tune mode.. Lots of relay clattering….. I have to stop transmitting & go into normal tune mode & re-memorize the frequency. Antennas are End Fed Zepps. Thanks Sid KC2EE ______________________________________________________________ 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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I have the same problem with my KAT500, mainly on 160m.
My problem is my antennas sit on a 26'x150' apartment building roof and are to close together. I have done all the Choke/Balun fixes I could. The fix for me is to get the antennas tuned using AUTO, then when I operate I switch to MAN. It seems to stop the random re-tunes caused by rf coming back into the shack on the other feedlines. so I would suggest you first do all you can to choke of that stray rf then try in MAN and see if that helps with your particular situation. ymmv On 9/23/2013 8:35 AM, Sid Leben wrote: > Using my K3 and other Radios thru my KAT500 at powers under 100 watts, I have the following problem: > > While transmitting at swr's under 1.5, the Tuner will go haywire & try to retune & go into the tune mode.. > Lots of relay clattering….. I have to stop transmitting & go into normal tune mode & re-memorize the frequency. > Antennas are End Fed Zepps. > Thanks > Sid KC2EE -- GB & 73 K5OAI Sam Morgan ______________________________________________________________ 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 Sid Leben
Sound like you are having a bad case of "Common Mode Current"
Are you using a Balun???!!!! ((((73)))) Milverton. >________________________________ > From: Sid Leben <[hidden email]> >To: Elecraft <[hidden email]> >Sent: Monday, September 23, 2013 8:35 AM >Subject: [Elecraft] KAT500 Tune Pblms > > >Using my K3 and other Radios thru my KAT500 at powers under 100 watts, I have the following problem: > >While transmitting at swr's under 1.5, the Tuner will go haywire & try to retune & go into the tune mode.. >Lots of relay clattering….. I have to stop transmitting & go into normal tune mode & re-memorize the frequency. >Antennas are End Fed Zepps. >Thanks >Sid KC2EE >______________________________________________________________ >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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In reply to this post by k5oai
I'm having similar issues but swapping the 1:1 common mode choke (balun) for a 4:1 will fix it for me.
73, Rick wa6nhc Tiny iPhone 5 keypad, typos are inevitable > On Sep 23, 2013, at 6:53 AM, Sam Morgan <[hidden email]> wrote: > > I have the same problem with my KAT500, mainly on 160m. > My problem is my antennas sit on a 26'x150' apartment building roof and are to close together. I have done all the Choke/Balun fixes I could. > > The fix for me is to get the antennas tuned using AUTO, > then when I operate I switch to MAN. It seems to stop the random re-tunes caused by rf coming back into the shack on the other feedlines. > > so I would suggest you first do all you can to choke of that stray rf then try in MAN and see if that helps with your particular situation. > > > ymmv > >> On 9/23/2013 8:35 AM, Sid Leben wrote: >> Using my K3 and other Radios thru my KAT500 at powers under 100 watts, I have the following problem: >> >> While transmitting at swr's under 1.5, the Tuner will go haywire & try to retune & go into the tune mode.. >> Lots of relay clattering….. I have to stop transmitting & go into normal tune mode & re-memorize the frequency. >> Antennas are End Fed Zepps. >> Thanks >> Sid KC2EE > > -- > > GB & 73 > K5OAI > Sam Morgan > ______________________________________________________________ > 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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