I've been looking for aluminum clad steel wire for an antenna project and this led finally to a source for aluminum clad high tensile steel ($90 for 3000' 11 ga). Certainly a LOT cheaper than copper
I've had a spool of this solid Al wire in a larger gauge and use it on a capacity hat as a perimeter wire. Unfortunately, it doesn't hold up to the onslaught of various perching birds and breaks. Whi
A good 1/2" drill and an adapter to the manual winch is another way to go, although it won't have pull down. My 2 speed gearbox variable speed motor reversible Milwaukee (Model # 5380-21 $160 at Home
Another way to go is to split the rock with feathers (also called wedges). Check with a local quarry, stonemason, or grave marker outfit to see if they will do it. A series of holes is drilled along
Fill the pipe with concrete - it won't bend and rust out if you crown the top. Use some rope guys at about 40% of the height and the vertical will last a lot longer. Grant KZ1W ______________________
I'm using a ladder line fed 80m dipole as an all band antenna with a tuned length of line, high Z 1:1 choke at the LL to coax junction. One assumption in these antennas kinda baffles me, so here is a
Could you post the dimensions for those of us without 4nec2? Here is a similar wideband 75/80m dipole with direct 50 ohm feed and a little more mechanical complexity than your design. It sims on EZNE
How many radials do you have now? What vertical antenna? More radials improve the efficiency of the antenna by reducing losses, especially when the feedpoint Z is very low as it likely is on 80m. How
The process I've used for 40 years for solder PL259's to RG8/11, not new or unique and in several texts: remove about 1.5" of jacket with a box cutter, bending the cable so you don't nick the braid e
Al, I'm a regular annual traveler to Long Lake for 30+ years, a friend has a camp there and I have been "chief engineer" for many projects, however not a tower. I'm wondering if you need to back up a
My G5RV's are 'get on the air' antennas with 100w and an ATU, but a dipole per band or set of fan dipoles work better in my experience and have a useful and predictable pattern but take more work. TA
The concern about the irrigation pipe should be its breaking strength as a composite structure. The concrete has low tensile strength and without reinforcement in addition to the very thin Al tube, I
After my original response, I did a little research on self support poles. Flagpoles have gotten a lot of engineering attention in the last decade as they have been pushed to astounding heights - the
Thanks Jim, A bit of an oops in my post, I hit send rather than save as draft. I was using buckling loosely as a term although for the really big poles the standard does include column buckling and u
McMaster-Carr www.mcmaster.com stocks a number of ASTM grades, A354, grade 8 in 36". It would be surprising if something more than 150ksi bolts were specified! What is unique about ASTM F1554 GD 55?
Look at the Simpson Strong Tie web site for lots of data. The permitted tension for epoxy anchors depends on a number of factors shown in the charts. http://www.simpsonanchors.com/catalog/adhesives/e
In addition to blowing out the dust, a good steel or brass brush should be used to clean the compacted dust from the barrel of the hole after drilling. Blow out the hole, brush vigorously, blow out,
If you get on an airplane, you are trusting your life to rivets, some are pop rivets. Here is a manufacturer's website which covers much of the engineering. http://www.cherryaerospace.com/ There are
*White Cap www.whitecap.com has a sale to the end of the month of safety equipment. I bought* ** ** *PRODUCT NUMBER:12111173 * *DESC: M-L RED/BLK HARNESS W/SIDE D-RINGS **QTY: 1* *PRICE: $84.99* *SUB
I think the base (concrete) drawings are on the UST web site, so they are a good proxy for same height tower carrying capacity, assuming of course the engineers all used the same UBC and safety facto