Bert: 73 de Gene Smar AD3F Hi guys, Thanks for all responses, comments and suggestions regarding the dimensions of a concrete base for a tower or other support structure. It seems almost everyone wan
Jim et al: I'm guessing that that tower failure was due to snapped HV lines on the tower that unbalanced the forces on that tower and possibly others along the power line's route (domino effect). See
TT: I worked in one place (can't tell you where, though) that had cables wound and corkscrewed around each other in conduit systems as described by both gents above. For a total rehab of the facility
TT: If you use electrical PVC conduit, it is rated for outdoor use and UV resistant. <snip> The electrical grade PVC conduit is medium gray in color. 73 de Gene Smar AD3F ____________________________
Ouch! So I have the rep as an advocate of drilling drain holes, do I? Sorry to disappoint, but drain holes are not needed if you cut the PVC in half and make a tray out of it. You can model this on E
Mike: The way a log-period works is the element lengths are such that a couple are near-resonant on the highest frequency of interest, e.g., 29 MHz and a couple are resonant on the lowest, say 14 MHz
Greg: Let's do the math and you decide whether the conversion to this Commscope cable is worth it: cable on reels: $25 4 N connectors (2 runs to tower): $160 Total cash outlay: $185. Non-monetary out
And finally, Zimmerman's Law: If, while repairing something, it starts working again, and you don't know what you did, then you didn't repair it. 73 de Gene Smar AD3F Hi Gene = Richards Rule = If you
John: I did exactly the same things you did - started my tower hole with a rented gasoline powered post hole digger and ended hiring a guy who happened to be a grave digger. I gave up digging after t
Ed: I convinced myself that Polyphasers are NOT weatherproof and ought to be mounted in some sort of enclosure out of doors. To that end, I mounted a Hoffman steel enclosure at the bottom of my tower
Scott: Tying the feedline leads from your loop together is supposed to work. But keep in mind that it is this parallel pair of wires that does most of the radiating - they form a vertical antenna, so
Scott: Yes, you can use magnet wire if it's available to you. But its insulation layer will probably scuff away after a year or two and the underlying wire will begin to corrode and open up on you. I
Bob et al: There was an FCC Ruling in 2003 http://hraunfoss.fcc.gov/edocs_public/attachmatch/DA-03-2196A1.pdf , as well as a Federal Court Ruling, that states the FCC or Federal regulators have exclu
Andre: I asked my insurance agent whether my new (at the time) tower needed a rider or if it was covered by my existing policy. She told me in a letter it was already covered and I wouldn't need a ri
TT: HB2U, father of the twentieth century. For an interesting read check out any of the books on the electricity wars of the late 19th century between George Westinghouse and TA Edison, both employer
Steve: I posted this http://lists.contesting.com/archives//html/Towertalk/2006-03/msg00168.html regarding my own 2001 tower project. The costs I listed were for materials at that time (plus and estim
Larry: For that length of conduit run, I'd advise against corrugated drain pipe. The leading end of the cable/snake rope will get caught in the corrugations along the way. You ought to consider two p
Ted: Here's my posting on the subject from a while back: http://lists.contesting.com/archives//html/Towertalk/2008-02/msg00056.html . 73 de Gene Smar AD3F ____________________________________________
Dick et al: Whatever connector you choose, consider installing a set onto the rotator cable at the bottom of the tower. (Mine is inside the steel Hoffman box with the antenna switch.) In that way you