I'm hoping to pick the brains of those of you who have experimented with various "modern" loop designs. With limited room, poor ground conductivity, and not being able to set up something permanent, I've been a bit discouraged by the sizes of antennas that people are using to get nulling patterns other than a figure-eight. However, after looking at Bruce Conti's page on the "Super Loop" (corner-terminated, corner-fed), I realized that this was something I could try after all.
This weekend, I threw together a "portable" 8' x 25' loop using PVC pipe and wood for the two end supports. I still need to do the termination and impedance matching right, but my "close enough" beta version was promising as far as signal strength across the BCB and noise levels, although the quality of the backside nulling wasn't as clear (the whole point of this experiment is to null out SoCal and/or northern Baja California). This was squeezed in between the house and carport, the only practical corridor I have for something this size. I would like the ability to have a support 20-25' high, mainly to get the loop more clear of structures. Questions: - How important is the shape and symmetry of the loop; e.g. wire sag, sloping ground, differing heights of the two vertical components? - How important is the height above ground for the bottom wire? - Does the type of wire matter much (within reason)? - If I want something reasonably sturdy and with the possibility of going up to 20-25' height, am I looking at $100 or more for a suitable pair of telescopic fiberglass poles? I don't plan on deploying this if it's windy. Thanks! Brian Rachford - Prescott, AZ [email protected] http://azswdxing.wordpress.com/ _______________________________________________ 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]
