Given a long enough feedline, one can make anything at the antenna end look like a perfectly matched load in the shack...even an open- or short-circuited coax. That's why we can use 100 feet of open-
Rohn's data regarding the self-supporting capabilities of 25G (RH-25) is based on well-established structural engineering calculations with a significant safety factor thrown in. I wouldn't be surpri
John, Thank you for your sentiments towards hams. As far as I am aware, there is no requirement for hams to use APC on 2.3 & 2.4 GHz. As an EME (moonbounce) enthusiast who plans to be on 2.3 GHz some
...or perhaps a discussion on the merits of using relative bearing grease. Dan KB5MY _______________________________________________ _______________________________________________ TowerTalk mailing
Sure. Help yourself. It's stored right next to the warp drivers. 73, Dan _______________________________________________ _______________________________________________ TowerTalk mailing list TowerT
Go straight to the senior engineer of the building department with the approved plans in-hand. The inspectors should be inspecting according to the approved plans and the printed building codes. I we
An auger on a Bobcat might work better. The extra weight of the Bobcat helps keep it in place. I used one with a trenching attachment to "saw" about 200 feet of 2-foot deep trenching through some ver
Robert, In the USA, a similar aluminum oxidation-prevention product is called NOALOX. I bought mine in the electrical section at Home Depot some time ago and do recall seeing it there within the past
Is that Telrex - or should it be TriEx? The TriEx tower line is now made by Tashjian Towers http://www.tashtowers.com. Their web page is a little off-kilter, but I was able to get to the pricing sect
Bob, Call Tashjian Towers. I did this about three years ago when the lift motor in my CT-9 (106-foot) tower trailer failed. Karl sold me a new direct-replacement washdown motor of the appropriate hor
I would have to disagree on the Tashjian customer service comment. I see no mention of trying the phone - with which I've always been able to contact Tashjian. Karl and his staff have been very helpf
Pro-Sis-Tel makes some nice EME elevation rotors of various sizes that would do the trick. Check their web page. The current US dealer is Array Solutions. 73, Dan KB5MY/6 ____________________________
That is so sad. I spent four years during the late 70's at USNA marveling at that system's construction and sheer beauty. Dan KB5MY/6 USNA '79 _______________________________________________ ________
Michael, The 3X to 4X is called a safety factor. It is considered good engineering practice to use safety factors from 1.5X and up. How low or high you go in safety factor depends on how much the fol
I used to work for a globally-known manufacturer of military-grade HF and VHF radios with annual revenues in excess of $100 million. Standard lead time for first-article deliveries on any order contr
Oh come on, Eric. You haven't seen a real wave until you've buried the bow of an aircraft carrier and experienced solid green water hitting the bridge windows 95 feet above the waterline ;-) 73, Dan
Yes - there are 100 MPH winds in southern California. I've experienced them twice since 2001 at my QTH about 40 miles NE of San Diego. They lasted for several hours. Multiple instances yearly of sust