I put my A3 with A743 dipole in the air in 1984 and it's still there with the truss rope intact. I'll be taking it down later this year to put up a new SteppIR in it's place. I've been curious about
You might try www.thewireman.com/rotorp.html. Their part #305 has (6) #16 and (2) #12 wires. If you buy 400' it is $0.96/ft. Unfortunately, you have to pay for the #12 wires that you don't need. 73,
Does anyone know how much horizontal movement is considered acceptable at the top of 100' tall Rohn 25G, 45G and 65G towers? I don't see any mention of it in the Rohn catalog. I know that the tops mo
No joke! It was a serious question and I was hoping for some serious answers. Specifically, how much movement is normal for the top of a 100' Rohn 25G tower. 73, Clay W7CE -- Original Message -- From
Garry was kind enough to send me some photos of his installation last summer. We met at Visalia last year and discovered that we had similar antenna installations. My Cushcraft A3 has been up in this
Gerald, Thanks for the pointers to the engineering data. That gives me exactly what I need. It also reminded me of an analysis that K7NV has on his website at: http://k7nv.com/notebook/towerstudy/tow
I found used Rohn 45 locally for less than $100 per 10' section. Cranes must be a lot cheaper where you live. Based on what friends have spent locally on crane service, two trips up the tree will co
My tree is a Douglas Fir (Pseudotsuga menziesii), which is quite different from a pine tree. Doug Fir is the strongest North American softwood species. Based on 23 years experience with antennas in i
Exactly! The tree is much stronger and more flexible than a steel tower. I can't begin to estimate the wind load that the branches present, but it is probably measured in 100's of sq. ft. 73, Clay W
I am designing a custom coax relay. I own a couple of Ameritron RCS-8V switchs and am pretty happy with them, especially since they are rated to 250+ MHz. I recently looked inside an Array Solutions
Both the RCS-8V and the Ratpak use an indentical looking relay with the same part number on them. It's possible that they are a standard part that has been customized differently for the companies,
I've been digging through the 2004 Revised Rohn Catalog (pdf version), but can't find the construction drawings for the guy anchors. The one I'm looking for is drawing #C620643. I've seen mention in
Thanks to Lee, K7TJR, I have the drawing I need. Thanks and 73, Clay W7CE _______________________________________________ _______________________________________________ TowerTalk mailing list TowerT
Tom, I was looking at the first picture from the link you gave. I need to do something similar in the next month or so. I'll be running 2 or 3 runs of 4" PVC drain pipe from the house to the tower an
The same could be said for an antenna farm consisting of multiple monobanders. Not a cheap investment when you consider the cost of the antennas plus two or more towers to put them all on. Question:
Yagi performance is a function of boom length, not the number of elements. There are limits to this generalization and it all depends on your definition of performance. Two elements on a 34' boom (fo
Thanks for the reply Tom. I'm using 7/8" Heliax (LDF5-50A). Is it considered acceptable to direct bury that coax? I'll probably go with conduit, but direct burial might be a reasonable alternative.
Does anyone know of a tower dealer who stocks Rohn 65G supplies? Specifically, I'm looking for a 15/16-16PP pier pin for the tapered base section and a BP6 base plate that it rests on. I've checked w
Thanks for the lead. I called Gerald and he doesn't carry any Rohn 65G parts, but I had a very enjoyable conversation with him. 73, Clay W7CE _______________________________________________ ________
Talk about tedious. Your constant bashing of a product that you obviously have no experience with and know very little about is more than a little tedious. Your earlier comment that boom length is t