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= = = (Bill) wrote in message
= = = om... I'd like to add a question to this post, if I may. My EF-SWL is on backorder. I have heard that there are two different reception characteristics depending on horizontal or sloping installation. Can anyone tell what the suggested angle of the sloper installation is, and what the direction of best reception is in each? Thanks! Bill BILL, Read - PAR Electronics EF-SWL Antenna http://groups.yahoo.com/group/Shortw...a/message/1666 Setting-Up the Ground Connection The general 'directivity' of a Sloper is toward the Bottom-End. Doing-the-Math on "Sloper" Antenna Installation of the Par EF-SWL Antenna with an Antenna Wire Element that is 45 Feet long. If the Bottom-Mounting-Point is at or near Ground Level: * When a Sloper is Rigged at 45 Degrees then the Top-Mounting-Point would be set at 32 Feet. The Ground "Foot-Print" of the Sloper would be 32 Feet. * When a Sloper is Rigged at 30 Degrees then the Top-Mounting-Point would be set at 23 Feet. The Ground "Foot-Print" of the Sloper would be 39 Feet. In either case, if you 'elevate' the Bottom-Mounting-Point by X Feet then the Top-Mounting-Point needs to be 'elevated' by X Feet. The Par EF-SWL Antenna can be Rigged as a "Sloper" using a Top or Bottom Feed-Point. * The Bottom-Feed-Point allows for the 'placement' of an 8 Foot Ground Rod at the Bottom-Feed-Point and by leaving about a Foot of the Ground Rod above ground level the Par's Matching Transformer can be Mounted directly on the Ground Rod. If conditions are right; you can run the Coax Cable Feed-in-Line alone the Ground directly under the Antenna Wire Element as a Ground Reflector. * The Top-Feed-Point allows for the 'placement' of an 8 Foot Ground Rod at the 'base' of the Top-Feed-Point. Run/Route the Ground Wire Straight UP to the Top-Feed-Point and connect it to the Par's Matching Transformer. If conditions are right; you can also run a a Ground Reflector Wire directly under the Antenna Wire Element. NOTE: If you can not install a Ground Rod at the base of the Sloper's Top-Feed-Point and are relying on the Coax Cable Feed-in-Line as your Ground 'connection'; then try running/routing the Coax Cable Straight UP from the Ground to the Top-Feed-Point. .. .. iane ~ RHF .. Some Say: On A Clear Day You Can See Forever. http://groups.yahoo.com/group/Shortw...na/message/502 I BELIEVE: On A Clear Night . . . You Can Hear Forever and Beyond - The Beyond ! .. .. |
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