I enjoy the chuckle! Is there a preferred direction toward which the golfer should face? 73 de WOØW : -) _______________________________________________ See: http://www.mscomputer.com for "Sel
Good Morning, Stew and TTs; Thank you for your post. It appears you implement the foldover or tilt function similarly, but perhaps better in some ways, than I do. I would enjoy seeing more details if
When considering grounding systems, do not overlook two major categories: soil characteristics and characteristics of the energies you are trying to ground. Important soil characteristics are conduct
Neither the series nor the parallel model is correct, except at one frequency. At any one frequency, one is equivalent to the other, with proper adjustment of the values. I suggest the parallel model
Hi, Jim; Are you referring to the measurement method published by George Hagn? Are all the necessary details in the more recent Antenna Books? My 19th, 15th, and 13the editionsoffer only a general de
Hi, Lee; Great question, and I look forward to seeing the responses. I plan a similar installation. one of my thoughts, subject to the responses we see, it to support the coax on another line fastene
I believe the single point ground is to hold all equipment grounds at a common potential; so that there is no potential or voltage between any two component grounds. Short and minimally inductive con
Hello to Bill and All; I'll share a professional experience from the 1960s, in which tuned modules used in a system that the firm I worked for produced exhibited erratic frequency shifts. I found tha
The Universal Towers base consists of steel legs with locking crossmembers (excuse my nomenclature) near the bottom and top of the base so that those legs mostly load the concrete in compression in e
Civil engineering handbooks, available at many public libraries, provide guidance on permissible bending loads on structural members of many shapes. Those same handbooks define slender columns and pr
Hi, Bob; You may find that computerized design has given us better optimized antennas, especially of the more complex antennas such as Yagis. Very slight modifications give us trade offs of bandwidth
Hi, TTrs; The cage must withstand the forces of concrete flowing around it during the pour. It must also be prevented from moving during the pour. Flowing concrete pushes real hard! I built my cage o
Hi, Lee; Base loaded verticals work, of course. It may be easier to lower the losses associated with short antennas with top loading, such as the "T" or the inverted L. Top hats work well, too, but t
The center of a 'temporary' dipole here is supported on 35' of Radio Shack steel mast. The antenna elements support it in one plane and two guys support it in a plane perpendicular to that. The guys
Hi Lee; I've been recording the critical frequency, F2, (foF2) for nearly a year, hourly. MUF is approximately equal to foF2 times the secant of the take off angle, where the foF2 is the value at the
Following is information I received from Hank Lonberg, S.E.,P.E. / KR7X, Lonberg Design Group about rebar grades and welding. 73 de WOØW Here is a url to a PDF from the CRSI (concrete reinforc
The suggestion to look for copper salvaged from a motor or a power transformer is a good one. I happened upon a few thousand feet, continuous, from a power transformer. Several hams report using stee
A couple responses mentioned that the steel may last only a few years. I mentioned that I have read of using electric fence wire only to suggest it as an inexpensive alternative to copper. I suspect,
Greetings, TowerTalkers; Regarding spark gaps and shunting static and lightning transients from vertical antennas: I refer you to "Lightning: Physics and Effects," by Vladimir Rakov and Martin Uman,
Hi, Gene; I agree that the informed ham should read ICE's material. The informed ham should also read PolyPhaser's Tech Notes and the book PP publishes. The informed ham must also recognize some bias