The reason I am trying a horizontally polarized delta loop is because I had a vertically polarized delta strung from the tower and it was too noisy. The tower was reradiating noise to the delta. I am using a wood pole extended out 4 feet from the tower for the apex support and the lower section slopes away form the tower about 30 degrees. I did a temporary lash up with feed at the bottom for horizontal polarization and 2 to 3 units quieter on the noise. Now I want to try linear loading to reduce the size a little too. I would rather have the vertical polarization for DX but don't like the higher noise level. So its all about the noise.
Bob K6UJ On Jan 7, 2012, at 5:02 PM, Herb Schoenbohm wrote: > Bob, > > IMHO what you described would be a linear loaded loop and the folded > down wires should be at the top and the feed where you described. This > avoids some feedline interaction. But remember such an antenna > depending on spacing from the tower will couple significant energy to > the tower itself. So all bets are off on getting mostly horizontal > polarization. The loop itself, even feed at the bottom center will > still have some of that. My suggestion, but you should model it first, > is to pull the bottom section away at a 45 degree angle from the tower > so you have a sloping Delta Loop. This would probably help reduce tower > interaction a bit. But the most ardent supporters of Delta loops > recommend wooden support poles and corner feeding for best DX work since > the vertical component is what really helps you on the low bands. > > > 73 > > Herb KV4FZ > > > > > > On 1/7/2012 8:29 PM, Bob K6UJ wrote: >> I am panning to try out a top loaded delta loop for 80 meters strung off the >> side of my tower. >> I want to have a horizontally polarized loop. I will feed at the middle of >> the bottom horizontal leg. >> Does the loading wire attach to the apex at the top on this loop ? >> >> thanks, >> Bob >> K6UJ >> >> >> _______________________________________________ >> > > _______________________________________________ > UR RST IS ... ... ..9 QSB QSB - hw? BK _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK