> I have done very well with the Quantum phaser but it isn't designed for SW > and is basically AM only. I don't intend to test and compare other phasers > at some point for AM. > > Does anyone have experience with a SW phaser ? I have little interest in SW > except for AM //'s and am wondering if the varied skip from E aand F layer > would make phase nulling unstable on SW ? Also, are there really that many > channels where it would help ?
As you mentioned, the slightly varying direction from which the signals arrive will affect the null. Directional antennas will have better overall nulling than phasing. One simple antenna is the W8JK two element. http://www.hard-core-dx.com/nordicdx/antenna/wire/w8jk.html Basically two dipoles fed out of phase from each other. It's a figure 8 pattern not unlike a loop. The fact that the two symmetrical dipoles are out of phase means the null isn't a point on a sphere or toroid shape, but more like two spheres that touch. If the antenna is 90 degrees to the distant station, the vertical arrival angle won't matter. The null will be maintained. A phaser won't have a null like that unless it creates a 180 degree phase difference between two identical antennas. In effect, making an array similar to the W8JK. I haven't tried the DX Engineering phaser on SW. I don't have two appropriate antennas at the moment. How about the flag and similar antennas? They should also provide good directional patterns at SW frequencies. Craig Healy Providence, RI _______________________________________________ IRCA mailing list [email protected] http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: [email protected]
