Hi Bob, I had a look at your QTH via Google Earth. Would appear that the only support you have is your tower. And on something like a 65 x115 corner city lot. How tall is your tower?
73, Guy K2AV On Sat, Jan 7, 2012 at 10:08 PM, Bob K6UJ <[email protected]> wrote: > 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
