The one piece left unchecked, (in my mind and I may have missed something here) is the coax between the KX3 and the tuner.It sure wouldn't be the first time I got caught with a short piece of coax that failed at the exact "right" time... can you spell MURPHY???;-)
Have a great day, --... ...-- Dale - WC7S in Wy > From: pontia...@monovasia.com > Date: Wed, 6 Nov 2013 09:40:44 -0700 > To: d...@w3fpr.com > CC: elecraft@mailman.qth.net > Subject: Re: [Elecraft] So here is one that has me stumped... > > Thank you for the responses and suggestions: > > 1.) Ran the ant coax thru the balun directly to the K3- SWR 4.2/1 > 2.) Ran the ant coax thru the LDG 600 Pro bypassing the amp- high SWR > 3.) When I hit the "tune" function on the LDG, I am getting from the tuner a > message "ERR_NO_RF_" blink once warning > > The only thing I can think of the LDG has an internal issue, everything else > seems correct…I had the exact same set up on my prior rig, same coax > etc….worked like a charm…I am beginning to think it is the tuner… > > Any other thoughts….I cannot believe I set a config by accident internal > within the K3 to cause this issue… > > My very best to all, > > George > > On Nov 6, 2013, at 5:46 AM, Don Wilhelm <w3...@embarqmail.com> wrote: > > > George, > > > > What happens when you transmit into a dummy load? > > What happens if you connect the K3 directly to the tuner (remove the amp > > from the path of coax)? > > > > If my understanding of your setup is correct, the K3 will indicate the SWR > > it sees into the input of the amp. > > OTOH, the amp sees the SWR at the input to the tuner. > > > > It sounds like you may have a problem with the tuner or the amp or the coax > > between the amp and tuner. > > You could also have an RF feedback problem that is causing your SWR > > readings to be crazy. > > Some work with an antenna analyzer may be helpful. > > > > 73, > > Don W3FPR > > > > On 11/6/2013 12:17 AM, George Pontiakos wrote: > >> Out of the box, fired 7729 up…set the configuration to the quick start > >> (which means all I did was select the external spkr set to 1). running > >> thru a LDG AT600 pro auto tuner…and an AL-811… > >> > >> All ran fine, great report across the bands…called Dave at Elecraft for > >> some help on setting the Sql to the RF collar…great accessibility and > >> customer service…. > >> > >> Came back from dinner….high SWR (ant is a Cobra Senior) > >> > >> Nothing else changed…but I get untransmittable SWR off of both > >> dipoles….really high….I tried the following: > >> > >> 1.) Checked against both antenna's…both way high > >> 2.) Switched Baluns….same result > >> 3.) Switched Ant on the LDG…no joy > >> 4.) Tried all Bands with the Tune press against both Ant…no joy > >> 5.) When I flip on the Amp…running 35 watts…the SWR's on the LDG show > >> pinned…on the K3 display show @ 1.2… > >> 6.) Receive works great > >> 7.) Replaced the coax from the K3 to the Amp… > >> 8.) Cut and restripped the ladder line > >> > >> > >> > >> Receive is fine….cannot transmit since the simple allocation of the RF > >> collar to the SQL function… > >> > >> > > > > > > ______________________________________________________________ > 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
