How high is the loop? If a loop is too close to the ground it will be an NVIS antenna and send your RF straight up into the clouds.
Use coax, not ladder line. A properly sized loop is supposed to have near a 50 ohm match if fed from a corner. Yes, you will definitely need a choke balun. 73, Tom Amateur Radio Operator N5GE ARRL Lifetime Member QCWA Lifetime Member On Sat, 15 Oct 2011 12:14:31 -0400 (EDT), [email protected] wrote: >I set up a 160m loop in the yard to try one out from all the great >reading I did regarding the antenna. > >For me I can get it to tune with no problems except the RF in the shack >is terrible. > >I ran 450 ohm ladder line from the antenna to my balanced line >connections on my MFJ 962 d tuner. > >As soon as I connect the ladder line the RF is bad, basically everyone >states that I sound like I am in a jet airplane. > >Now there is also a bit more to the story as the loop surrounds the >house as that is how the trees are plus the dipole is also very close to >one of the edges on the inside of the loop. > >So I dont know if the problem is that everything is in the middle of the >loop, or running ladder line into the shack is a bad thing, maybe the >tuner internal balun is not the correct one. > >Bottom line is the K3 was real unhappy with this scenario so the ladder >line is pulled out of the shack and coiled up on the tree next to the >loop outside. > >One thing I have researched this morning is that I need a current balun >and I should have it external to the shack and run coax between it and >the shack. Also I should have the shield grounded like I do with the >dipole to direct ground. > >So I thought I would share my current failure while I ponder my next >move or give up on the loop. Ok I wont give up, YET! > >Cheers > >~73 >Don >KD8NNU > >______________________________________________________________ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:[email protected] > >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:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
