Oops... <snip> That should have said I should have close to a 1' overlap (+ 2 or 3" - 0) 73 Roger (K8RI) _______________________________________________ ______________________________________________
You might try www.tmastco.com. It is run by Henry, K4TMC, and stocks a variety of fiberglass and aluminum products that will meet your needs, probably for a lot less than you can build them yourself.
My neighbor (W8LEP-sk) used rain down spouting for his vertical for many years. He stood it on an electric insulator that was attached to a 4X4 post buried and it lasted for many years. He had to guy
As a practical matter, fiberglass structural material (e.g. Extren) is about the same price as aluminum, about the same strength, but twice the flexibility. It's available in 20 foot lengths as tube,
That's the usual thing (charging by actual length).. most metal places around here actually charge by the pound, plus a "per cut" fee (which can be quite low.. like $1/cut).. kind of depends on what
In this quest for a telescopic mast for supporting an inverted vee, the first one I ran into was the Spiderbeam "Aluminium Telescopic Mast 18m (60ft)". Yes, they spell it "aluminium" throughout the a
I've used the fiberglass poles like the power company uses to reset breakers up high on poles. I sold a 30 foot one and have a 35 foot one here. Used it to support a number of wire antennas - the mos
Those are the "Hot Sticks" made by Hastings Fiberglass (yellow) and AB Chance (orange). Hastings has two versions, with round sections and triangular section (No Twist). Maximum heights are 35 and 40
I picked up the last two of the auction website for a little over $100 each. Plenty cost effective compared to the much smaller diameter ones available. Mike, k5wmg Pipe Creek, Texas Green cars, slow
I figured it like this... If I purchased all parts separately, I have no one to blame but myself if it does not work, especially I assembled tubing from multiple sources, I cannot blame any one sourc
Oh dear... I don't think that is a good plan. After erecting my 43 footer, I do not think it would be a good 43 foot mast to hold a dipole. Maybe only ten or 15 feet of it would do that safely. There
A data point. I had an inverted vee at 60 feet, using irrigation tubing. The bottom 30 ft was 3 inch O.D., and the top 30 ft was 2 inch O.D. Wall thickness was 0.050 inch. This is about the flimsies
All: To give you a different perspective on the amount of overlap that should be considered in slip joint connections, the industry recommended practice for tubular and multi faceted steel transmissi
In my extensive experience with irrigation tubing, I have found this to be quite adequate. Plenty good enough that if you stress the joint, the tubing will buckle instead of slipping out. In terms of
My experience with irrigation pipe: I've had a two similarly constructed phased 67ft phased verticals for 80m up for 20 years. Mine are 30 ft of 4 in at the base, next, about 28ft of 3 in, (two foot
What I worry about in that case is oscillation under the right wind conditions. I think Davis, The RFConnection, and I know there's a third one selling what they call "Poly", double braid. I don't kn
After much experimenting, I have learned something about the oscillation problem: 1. The worst design is a uniform diameter vertical guyed at equal intervals. This is somewhat obvious from physics.
Particularly with aluminum..(DeHavilland Comets and all that) What about wrapping a rope in a spiral around the outside of the element to kill the aeolian vibration (like they use on car antennas the
What I did was to run a small (1/4" dia) Poly rope the length of the vertical. Epoxied it at the top, pulled on it to apply tension and epoxied the rope to the bottom. 73, Dick, W1KSZ _______________
Does the antenna have a roof window? <:-)) Seriously has about a shot of the soft foam in a can every few feet inside the tubing. I'm talking about the soft white stuff, not the yellow foam that expa