John: Others on here have offered in the past the suggestion to use monofiliment fishing line as a truss from the end of the boom to the mast. Makes it difficult for the critters to roost. 73 de Gene
TT: I finally found it after searching for a couple of days - an article I uncovered in 1998 on theory and design of LPDAs. Well worth the read. http://www.salsburg.com/Log-Periodic.pdf 73 de Gene Sm
Al: I bought my home in1983 in a deed-restricted neighb orhood, although K6IR/6 (SK) lived up the street from me at the time. He had a 72 ft crank-up in his yard on top of the highest hill in my deve
Roger: I understand why you might think that weatherproofing a ground clamp on braided coax like RG-8/u might be tricky. However, it can be done if you apply the proper materials. I posted some time
Pete: Electrically the method you describe is identical to mine and to commercial shield grounding kits. However, mechanically your method uses a barrel connector plus two more PL-259s than the shiel
Chas: I would say spend the $ for a quality box to protect your equipment investment. Hoffman http://www.hoffmanonline.com/index.aspx?cat_1=1361 make decent enclosures in a variety of sizes and mater
TT: Here's another: "The difference between theory and practice in theory is less than the difference between theory and practice in practice." 73 de Gene Smar AD3F __________________________________
TT: For more on pseudo-science, read Sagan's "The Demon-Haunted World - Science as a Candle in the Dark." 73 e Gene Smar AD3F _______________________________________________ _________________________
TT: Allow me to relate a positive experience I recently had in dealing with MFJ customer service. Last week I received a 15A switcher PS from MFJ, their model 4115. I bought it for EmComm use with my
Kelley: I have a set of the fiberglass swaged tubes from E-pay. I can get a set of five tubes up in the air, provided I don't have too much weight at the top and I guy it immediately. They aren't str
John: http://lists.contesting.com/archives//html/Towertalk/2011-03/msg00337.html . I don't like the use of coax connectors on either side of a PL-258 barrel connector to provide this ground connectio
TT: For a commercial implementation of the subject configuration, Google "MIMO." 73 de Gene Smar AD3F _______________________________________________ _______________________________________________ T
Gents: From the QRP_L reflector: http://www.heathkit.com/ . I sent Heath a note welcoming them back into the market and offering some suggestions for Ham Radio kits, if/when they decide to open that
Bob: Instead of a copper ground clamp (likely to cause corrosion at the connection point due to dissimilar metals in contact in water), I'd suggest using stainless steel bolts, lockwashers and nuts p
Marlon: If you want to try something else to seal the connectors on your coax runs, I can sugest 3M Scotch 2200 vinyl mastic pads. I used them right on top of the homebrew ground straps and underneat
Carol: You may have to tune the radials in pairs, like a dipole, according to some postings on Topband Reflector. Otherwise it sounds as though your design might actually work. GL es 73 de Gene Smar
TT: I used a plastic funnel (Home Despot) with the neck cut down a bit to almost fit the mast. Then I split the top of the remaining platic into slits to slide over the mast. I sealed this with a SS
Rob: When I worked at an electric utility as a substation engineer, I would specify removing of concrete pedestals from abandoned equipment by the jackhammer-and-topsoil method. Our company required
Dick: I would suggest two pieces of Unistrut steel channel across the top and bottom of the box, bolted to two tower legs with four u-bolts. Just don't tighten the u-bolts too much and thereby kinkin