I had an extra hole in the boom for a bolt that was no longer needed and found that the wasps/yellow jackets used the hole to make a home in the boom. I stuck the nozzle of the spray in the hole and
I work for the NY public utility commission and was responsible for a major transmission siting case a number of years ago. If you read the actual studies, you will find that the greatest fields on h
The answer is in W2PV's book--the number of elements is somewhat unimportant compared to boom length. In his book, Jim Lawson pointed out that a .75 wavelength boom (54 feet on 20 meters) has almost
At the risk of getting into something that I really know nothing about on a technical level, let me give you some anecdotal input. I had 100 feet of Rohn 45 guyed with quarter inch ehs as follows: Gu
Go to BJ's or similar, buy a big plastic container, put the rotator in the container when you open it up. Then pick up all the bearings from inside the container. -- Original Message -- From: "Mike"
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I have had a 4 on a 54 foot boom (actually 57 with a 3 foot tail for balancing) up for over 7 years. (and Fred, K2TR has a pair of 6's on a 54 (57) which has been up at least 10-15 yrs). The boom is
Forgot to sign this--DUH! Saul K2XA --Original Message-- From: Saul Abrams <sabrams@nycap.rr.com> To: Stan or Patricia Griffiths <w7ni@easystreet.com>; Richard Karlquist <richard@karlquist.com>; Towe
One caveat about galvanizing--I spray-painted my mast with rustoleum only to find that it would not pass through my precision thrust bearing at the top. I actually had to have the bearing turned out
Pete, It is my understanding that a catenary is used to raise antennas over obstructions, like trees, houses, guywires, other antennas, etc. If the cantenary line is so slack as to be almost vertical
David, There is an easier way to raise the antenna. Raise the antenna straight up the tower so that the elements are vertical and the boom is perpendicular to the boom of the fixed antenna. Bring it
Absolutely!! I had the same problem with an A4S--just a few bugs and wet grass in a trap makes all the difference. After the clean-up, it was right on the money. By the way, you only have to clean th
Don't forget to order extra concrete as the hose will still be full of it when you stop pumping. Also, when the pumper is cleaned out after the pump, that extra 'crete has to go somewhere--on the gro
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Assuming you can work backwards to calibrate your rotator, just wait til the sun is near the horizon, aim the antenna at the sun, run GeoClock and the progran will tell you exaxtly where the sun is a
Hi All, I have been biting my tongue for years about the theoretical load of Rohn towers. It may be important for building code purposes and surely is for Rohn's litigation exposure, but in the real
I am in the process of refurbishing a two-inch Telrex rotator that has given over 30 years of reliable service. It has been turning a 4-element 20 meter beam on a 57 foot boom and a 4-element 15 mete
I have an A4S and several Th7DXX. I have also used a TH5 at Field Day this year and a local has had one up for years. The A4S is a very good antenna electrically--I am often surprised with its good p
As an employee of a state regulatory agency, I have been to transmission line construction sites and have seen that the very heavy machinery used seriously compacts the ground around and between the