Hello all, thanks for looking As folk were discussing wire antennas, please forgive another non T-T specific post! I have a fair amount of experience with beam antennas on HF / VHF, and colinears on
Paul, I have used the same basic set-up here with very good results. There were two changes however which I found necessary. First, winding RG-58 on a small diameter core will work for a few days but
HI Paul: This is one that will probably catch a lot of people with their opinions up. My take on your loop is first, by formula, your loop will be a full wave just below 7 mHz, and should load fairly
Paul, I fully agree with Frank. You should indeed switch to 300 ohm or better yet 450 ohm. Once you have done that, you can play with adding various lengths of extra feedline (which will change the i
Pete, you were fully correct - this one has the potential to generate lots of opinions. I only partially agree with you, Pete. Your suggested feed method is perfect for feeding the resonant loop (say
Chuckle: Well, Rick, I cooked the balun in an MFJ 989 a dozen years ago, running a few hundred watts on 75 from a Hercules I. It stank something terrible. I also cooked the roller inductor running 10
Feed the loop with 450ohm ladder to a point that is close to entering your home, install a 4:1 current balun B4-2KX from Radio Works ($59), then coax (8' or more) to the tuner. The length of the 450o
<snip> "450ohm ladder will not radiate, like coax will, because one side cancels out the other side." This is only correct if you do EVERYTHING properly. This requires that the entire system has to b
Hi all. Many thanks for all of your comments, much appreciated and now digested a little! The loop is playing well for me in some respects. To my surprise, I'm getting good reports on top band using
Yes, Paul, A half wave loop on 80m may not give as good a result, as it is an opened up dipole folded back on itself. Certainly would cancel some of its radiation. However, on all higher bands 40m an
Hi all. Thanks for all who have responded! I'm not sure where the "no groundwave signal" stuff started.. I said that I'd noted QSB on a signal from approx 5 miles away as RF goes on 80m. I assume tha
Paul, with a loop 5 feet from the shack window, you likely will have RF in the shack no matter what balun you try. There is a 3 dimensional torus of radiation around the loop wire, and at the bands o
running full wave 80 m vertcal plane loop here 30' feed and one vertical side of loop about 15' from rig fed in center of 33' vertical section loop is 33' x 102' rectangle with bottom wire avg 20' ab
Stuart. I'd come to that conclusion as well, so I may try to move the feedpoint further away from the window. The rest of the loop is about 8ft higher than the guttering, but the actual feedpoint sag
Paul, Yes, height above the shack window and structure would be helpful. We put up a horizontal loop for our club station on its flat roof building. However, there is a metal strip around the edge of
Thanks Stuart. That's interesting, as I've also seen another type of loop where there are 2 loops one above the other constructed with a single wire. In other words, a double loop. The spacing is abo
Paul, The metal roof edging is not a continuous single piece but crimped and painted such that we did not feel it a reliable RF conductor. It was galavanized steel and attached to wooden boards that
Stuart. Yes, I see the problems. There's obviously a few bits of hardware on the roof with all those feeders and obstacles. Hope the cloudwarmer works out for you. 73 Paul MW0CDO. -- Original Message