What exploding concrete?? Back up your claim with real life validated proof. My experience has been the opposite. Doug Want evidence? See Figure 4 (and the text below it) in the link below: http://ww
Good suggestion. I use a can of silicone spray lubricant and apply it to the jacket. Electrical properties are good and this keeps the jacket from twisting and deforming while screwing the connector
I live 800 feet from a parallel feed of three 345KV lines. I'm a low-band operator and for the past seven years at this QTH, the noise level from the lines has varied from slight to deafening, depen
The issue is not the FCC's authority over the subject matter but the potential impact to the public at large. While the FCC can levy a fine, the claim would not stand an injunctive action to compel
I am looking for input regarding the type of cable preparation tool should I should use to prepare RG-58 cable for installation of a PL-259 connector and UG-type reducer. Actually, I will be using RG
Probably the most important item at the time of order is an intangible that cannot be purchased on-line: Proper training and use of the harness. I am amazed at the number of folks who will purchase
The League should not (and likely will not) render legal advice unless there's an established attorney-client relationship. They may put you in touch with one of their volunteer counsel, but this is
As part of a link-coupled tuner project, I need any of the above B&W "HD" series coil sets (e.g., 80 HDVL, 40 HDCL, 80 HDA, etc.) in any condition so long as the base insulator and jack pins are inta
CQ Contest magazine for a total of over 10 years. I'm hoping to reprint all of them in an upcoming book." Wow. At a minimum, I would ensure that a disclaimer is conspicuously posted in each and ever
No doubt, but the climbing and rigging of a tower inherently has greater risk (e.g., propensity for fatality) than DIY articles on say...woodworking -- although I know of some skilled carpenters wit
David, Bill, W4ZV referenced this effect early in the discussion: "This problem has to do with something called magnetic coupling (or polarization) loss. This primarily affects 160m which is closest
David, It was actually part of the side-bar discussion presently running under "EZNEC Needs Improvement." Paul, W9AC -- Original Message -- From: David Gilbert To: Paul Christensen Cc: TowerTalk Sent
"The SWR is determined by the load at the end of the line, and don't you forget it". I believe that line came from "My Feed Line Tunes My Antenna!" a classic article by Byron Goodman, W1DX (QST, Mar.
The arithmetic mean between 30-ohms (best power handling) and 77-ohms (lowest loss) is 53.5, the geometric mean is 48 ohms. The historical choice of 50-ohms represents a compromise between maximizing
The "additional loss" is a function of line VSWR and is added to the matched line loss. For example, consider a 100-foot length of transmission line that according to the manufacturer's spec sheet e
The additional loss can generally be ignored with low-to-moderate amounts of matched line loss and moderate line VSWR. To demonstrate the additional line loss effect, compare two different feed syst
Great story and it's just as relevant today: I found a large stash of the same Johnson ceramic insulators and was a bit perplexed as to why they had notches on the outside. I was about to route the
Back in the '30s, open feeder lines were taken very seriously. Take a look at the article below and the insulators Collins once sold for 1/4-inch copper tubing, The combination of tubing and their c
Jorge: Both the Amphenol 83-1SP (standard) and Amphenol 083-822 (silver/Teflon) are excellent. I generally order 083-822 from Mouser: http://www.mouser.com/catalog/638/1168.pdf I don't believe Amphen
K8RI: > In all my years I have never seen any one attach a reducer like that. Roger, in all your years, you must have seen this procedure in the ARRL Antenna Book and ARRL Handbook. A sample of the t