Don, Already gone and replaced... Jack - KD4IZ -----Original Message----- From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> On Behalf Of Don Wilhelm Sent: Sunday, July 11, 2021 17:07 To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KAT500 ANT1 problem
And discard those "Amazon Special" PL-259s. Use only quality connectors. It is not worth it to use off-spec connectors - you are witness to the pain and heartache they can cause. 73, Don W3FPR On 7/11/2021 4:52 PM, Dave wrote: > If it were me, I'd replace the SO-239 on the tuner... That way, you > know the issue won't come back to haunt you later. > > 73, and thanks, > Dave (NK7Z) > https://www.nk7z.net > ARRL Volunteer Examiner > ARRL Technical Specialist, RFI > ARRL Asst. Director, NW Division, Technical Resources > > On 7/11/21 1:48 PM, kd...@frawg.org wrote: >> Many thanks to Ken (K6MR), Joe (4X1RV), and Kirk (K6KAR) for your >> quick answers and for providing the schematic information. >> I pulled the unit and did some poke and prod testing with a DVM here >> on the anti-static mat. My fear was that K18 had a bad contact in the >> ANT1 position. -Not!- What had apparently happened was that I had a >> batch of the offshore made "Amazon Special" PL-259s that appear to >> have a slightly oversize center pin. >> The patch cable used until recently had one of them on one end. It >> had spread the leaves on the ANT1 SO259 just enough that a good >> connector, when perfectly centered and seated, did not make contact! >> Gentle recentering of the leaves with a miniature flat blade screw >> drive yielded relief and a self-administered head smack. >> Jack Spitznagel - KD4IZ >> Science River LLC >> Biomedical Consulting Services >> >> >> >> -----Original Message----- >> From: kirk.hard...@k6kar.com <kirk.hard...@k6kar.com> >> Sent: Sunday, July 11, 2021 14:07 >> To: kd...@frawg.org >> Subject: RE: [Elecraft] KAT500 ANT1 problem >> >> Jack, >> >> The KAT500 schematic is on line (partial) >> https://www.qsl.net/wb4kdi/Elecraft/KAT500/KAT500_RevA_page1.png >> https://www.qsl.net/wb4kdi/Elecraft/KAT500/KAT500_RevA_page2.png >> https://www.qsl.net/wb4kdi/Elecraft/KAT500/KAT500_RevA_page5.png >> Although all schematics aren't available, this may be enough to get >> you going. >> >> 73, >> >> Kirk, K6KAR >> >> -----Original Message----- >> From: elecraft-boun...@mailman.qth.net >> <elecraft-boun...@mailman.qth.net> On Behalf Of kd...@frawg.org >> Sent: Sunday, July 11, 2021 12:38 PM >> To: Elecraft@mailman.qth.net >> Cc: 'Elecraft Support' <supp...@elecraft.com> >> Subject: [Elecraft] KAT500 ANT1 problem >> >> All, >> >> >> This is likely something very straight forward, but I do not have a >> schematic to follow and troubleshoot. >> >> Symptom: ANT 1 circuit seems to be dead. No match and fault on switch >> from >> ANT2 to ANT1. No receive signal. >> >> Tests: >> >> Took KAT500 out of line to by-pass tuner, antenna on ANT1 is OK and >> will match normally with rig's internal ATU. >> >> With KAT500 back in line, selected each tuning position (AUTO, MAN, >> BYP) no >> difference >> >> With KAT500 still in line, ANT2 and ANT3 work nominally. >> >> Checks: >> >> Reset to factory defaults, restored last working Configuration, no >> change in above behavior. >> >> >> If I was a betting guy, I'd guess a relay or switching diode was open, >> however - no schematic, don't really know. >> >> Did I miss something >> >> >> >> Does this little beastie need to go back to the mothership? >> >> >> Thanks, >> >> Jack Spitznagel - KD4IZ >> >> Science River LLC >> >> Biomedical Consulting Services >> >> >> >> ______________________________________________________________ >> 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 >> Message >> delivered to kirk.hard...@k6kar.com >> >> >> ______________________________________________________________ >> 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 >> Message delivered to d...@nk7z.net >> > ______________________________________________________________ > 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 > Message delivered to d...@w3fpr.com ______________________________________________________________ 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 Message delivered to kd...@frawg.org ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
