thanks guys, I will experiment with the top loading and also pulling the bottom away to a wider angle and see how it goes.
73, Bob K6UJ On Jan 7, 2012, at 8:17 PM, k...@voyager.net wrote: > Bob: > > The simple answer is Yes. > > I remember the article on the loaded delta loop but have never modelled it. > I assume that the single wire top loading will also lower the feedpoint > impedance. > > GL & 73 George K8GG > > > > > 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 > > _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK