Well certainly an interesting thread. I can comment that in talking with the guys at SteppIR, they ARE working on a 40 and up Yagi/Dipole. No details as yet but it is supposed to have somewhat shorte
I agree with Bill and Joe! What an outstanding piece of work by someone so young! Bob, W5LT "It appears that this young man knows more about Logic, the regs, electronics, propagation and -- Honor --
Rich: Also look at http://www.us.hilti.com/holus/modules/home/home_main.jsp They make professional anchoring system of the type you need. Anchors available include standard carbon steel, stainless, a
The foundation bolts referred to appear to be for attaching a frame building (house) to its slab or pier foundation. They are made of A36 steel, which is the lowest grade (yield strength = 36,000 psi
Be careful about welding aluminum. A qualified welder can no doubt do the weld, but consider this: Unless the weld is a weld repair (re-welding an existing weld to eliminate cracks or broken welds),
If you want to guy a self supporting tower it needs to be done very carefully (read: professional analysis). But then, isn't the title an oxy-moron? If it is self supporting, why does it need to be g
I would also suggest the 2 element SteppIR yagi, if the 3 element is too large for your application. It is lighter weight, lower wind load, and has a <5 ft boom, and nearly the same performance. See:
Facinating topic, but doesn't it take a special, or at least a very modern HF radio (and antenna(s)) to do this? How would one 'tweak' the notch, or the APF tuning, or others of the myriad of control
Seems like this problem should be an easy one to model with AO or similar modeling program. Tell the program the antenna is in free space, then define the antenna and then the screen in the Z-lane be
All: I have a question about tower foundation design. My current Self supporting tower uses a "drilled pier" style foundation that is 4.5 ft dia x 8.5 ft deep. I am relocating to a new QTH, and the c
James: Several ways: See the following for how Heights suggests doing it for an embedded base: http://www.heightstowers.com/bases.htm Also, I designed the fold-over bases for them, which uses standar
To add another thought to the long litany: Here in Texas, a number of folks have improved the gripping power of various rotator systems by adding a small section of tractor implement belt between the
Anyone out there built their own suppressor for rotor/switch control lines? It seems the commercial ones are just boxes with MOV's across the lines, and the MOV's are cheap. I am doing a new install
Hi: I am trying to migrate from AO to EZNEC to simplify my life. It is awkward at best to keep switching from Windows to DOS and back to do antenna analysis. I am very used to the features of AO, and
The Mosley TD-2W is a commercial example of what you are looking for. I had the three band version (TD-3W), which covered all three WARC bands with a single trap assembly. The -2W I am sure is simila
HI All: I am putting in a ground system at my new QTH. Will have a ground ring at the tower with (4) ground rods, plus (2) radials plus a home run separate but in parallel with the RF and control cab
Did you consider a fold-over tower? The fact that you say you cannot use guys suggests that you are space limited? I have a very nice motorized 72 ft. fold-over Heights tower, PE rated for 35 sq ft o