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On Dec 24, 2:49*pm, "JB" wrote:
"Steve Stone" wrote in message ... I have a 5 band Hustler vertical. Available install space in my backyard is an area adjacent to my septic system leach field. I really don't want to place the antenna in the middle of the leach field and risk hitting an outflow pipe. If I put it just outside of the reach of the outflow pipes the ground is still relatively moist due to natural run off and the leach field. So will this leach field moisture enhance or inhibit the verticals performance due to soil conductivity.. or none of the above if the antenna is installed as indicated in the Hustler installation manual. (2 radials per band using insulated copper wire, 4 foot metal mast pounded directly into the ground, no concrete, no wood). There is also a 4 foot high chain link fence surrounding my backyard, 300' x 150', one side about 25 feet from the potential install location.. No trees or shrubs closer than 15 feet from the vertical mast. Steve N2UBP You would have to test the conductivity. *If you have good soil conductivity several wavelengths out from your property it will surely add to performance. The problem with moisture close to the surface is corrosion. *Get the ground and coax connections up out of the marsh by a foot and seal them. It probably wouldn't hurt to carefully dig a post hole so you can feel around, then just fill with gravel. A pole in the ground does little for RF performance. *You can't get resistance low enough to avoid great losses. *Currents are greater in the first 1/8 wavelength so there is no substitute for keeping low resistance metal there. *Add at least 8 or more full 1/4 wave for the lowest frequency (and preferably 100 more). *It will be more critical at the lower frequencies. *The 2 per band act as a counterpoise and will help keep RF out of the shack, but do little for performance by themselves. *The goal is to capacitively couple to the surface of the ground with a field of multiple radials. I hate chain link fences. *Not a big problem when new, but as they age they actually generate harmonics when you transmit near them. *I have a Butternut HF9v on a metal roof. *I had to pay attention to hardware on the roof and bonding to the metal carport. *Traced bad TVI to corrosion on a nearby TV mast. *On a normal roof I would seriously consider running many radials inside the attic, then lightly camo paint the antenna with Krylon Flat Acrylic to match the view from the neighbors and break up reflectivity. Beware though darker colors may detune because of the pigment.- Hide quoted text - - Show quoted text - My neighbor used to have a chain link fence that generated electrical noise when the wind blew. I didnt realize what was making all the pops until the house sold and the new owner put up a wooden fence. Jimmie |
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