TowerTalkians: In order to keep up-to-date with the most accurate method of determining antenna wind surface area, we will be adding the following new specifications to our antenna instruction manual
Roger: I've picked the TH7DX at 11.5 to compare (because I own two of 'em and two TH6's). This has, in the manual that came with my TH7, a wind surface area of 9.4 s.f. If this is the number that one
'em and two TH6's). This has, in the manual that came with my TH7, a wind surface area of 9.4 s.f. If this is the number that one matches with the Rohn 25G or 45G numbers in ovals or rectangles, the
I was able to find a Rohn catalog dated Apr 1993 (although the inside cover said 1991). It looks like the numbers in the ovals should be used, as these specify "allowable projected area (sq. ft.) for
Hi Roger & All, I agree with all of what Roger said, with one exception. Note 4 on the 45G guying diagrams says the designs include 8.0 SqFt for side arms. If we aren't using them, we get to add 8.0
you wind. Now here is an interesting idea. What about a wind direction--sensor/limiter that would provide an indicator of directional wind stress, or actual rotor control in high wind conditions to
This is a multi-part message in MIME format. --=_NextPart_000_003B_01BDCAE5.6946A180 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable About 15 years ago I bu
--87386629866C6702A8693D2D Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit direction--sensor/limiter that would provide an indicator of directional wind stress, or actual r
This year at the International DX Convention in Visalia, a new product was demonstrated. It consisted of an anemometer mounted on the top of a US Tower crank-up that was hooked up to a digital contro
Author: Dick Green" <dick.green@valley.net (Dick Green)
Date: Wed, 19 Aug 1998 12:33:15 -0400
The new numbers could have some serious implications for some of us. Let's translate this discussion into English for the non-engineers among us. Obviously, the new computation standards have signifi
<< The new numbers could have some serious implications for some of us. Let's translate this discussion into English for the non-engineers among us. published windload ratings on some Hy-gain antenna
. It was pretty slick and came if US Tower That's fine. But what are you going to do when a storm is going on, winds are below the maximums and then comes along a nice gust that takes out your tower
More features: o Use combination of precip detector, temp gauge and wind speed to determine whether icing conditions are forming. If so, lower the tower. o I like the idea of a dial-in control line.
Does anyone seriously believe they can overload a crank-up tower and protect it with a wind-direction controlled rotor? I HOPE NOT ! Don't tell your insurance agent that you were counting on the auto
I think this just goes to show that there are many ways to calculate "square foot" capability when it comes to antennas and/or towers. Both tower and antenna manufacturers have been (intentionally,
Tom's right on this one. It's a bad idea. I have visions of one of the neighbor's little kids standing inside your crankup tower as it automatically comes down . . . Also, unless you have a positive
I was not among those discussing a crank-up, don't have one and am unlikely to ever have one. My tower is fixed and both it and the beam will be rated to take normal winds. I am interested in the va