We have continued the process of adding new models and improving existing products in the tradition of the founder. However, I was curious to know how the two antennas would compare when both were placed at a relatively high elevation. At last, when a quad is erected in diamond, at winter the rain or the snow can slide along the wire what reduces the accumulation of ice on the antenna much better than using a square quad on which the ice can easily accumulate on all wires horizontally tight. The feed point is about 53 ohms Moore describes his antenna as "a pulled-open folded dipole". Switchable polarisation possible hor, vert, circ.
Quad or Beam??
This will detune the antenna because this added length becomes part of the radiator! Your measured impedance may be slightly different due to your construction techniques, etc, but you should be close according to the program used. February 26, No comments. Smaller antenna for expeditions and countryside operations. Sizes see table below. If tuned for maximum gain, the bandwidth for a 3-element quad antenna is limited: Download X-Quad installation instructions.
Cubical Quad Antenna
Regular dipoles would have so much corona from the protruding ends that the dipoles would gradually melt back from the tips, shortening the antenna! The size of the hole to diameter of the internal wall thickness of the fiber glass dispelled this concern. Interaction between antennas of a multiband quad are quite low, even when fed with a single feed line. Antenna experiment - Delta Loop for 7 Mhz band. Radiation resistance is affected by antenna height above ground, element spacing, and environmental conditions. The upper and lower halves of each side being out-of-phase, further canceling radiation.
Success was not assured It has always the same strength independent of the time of day, possibly a bit weaker at sunrise. It is recommended to build the first such antenna you attempt from wood. SWR readings were a bit long; all 3 bands were right around 1. You should have 4 equal length sides on each element of this 3 element quad. The R8 provides degree omni coverage on the horizon and a low radiation angle in the vertical plane for a better DX. Only big point in favor of the quad thanks to N6DBH for the note , each loop is constituted of 2 stacked dipoles: