Relative to modeling towers with yagis on them. It has always been my approach, although I don't have hard data to support it, that the only yagi that matters is the top one. And if you replace the m
A wavelength must be a VHF rule of thumb. There is no one on the planet with wavelength spacing of HF stacked antennas on a mast. The typical stack distance goal is 10 ft on the mast. Some people mig
N4MB had an interesting note on this subject: "Congratulations, Patrick, you live in an isolated place where there is no building code authority and no locally adopted building code. There is, howeve
I was in the same situation back in my teens near Boston. I installed a self supporting tower that was 48ft next to the house. Some would opt for a bracketed tower next to the house but I felt uncomf
Don't be intimidated by "pages of formulas". It's a pretty basic concept. If the diagram show a 4 x 4 x 4 cube and you have a 4 -5.5 ft cube. Your cube ends in undisturbed soil (from the backhoe) and
Filipe. Another option is to use a 15V supply. Allow the voltage drop. And use a wireless connection to the rotor using a system like GH Everywhere. You might need a directional antenna on the receiv
Doug. I have found that same problem if something has "crushed" a portion of the jacket. Not enough to short it but a deformation. Like a tree or branch. Can you walk the length of it and inspect? Ed
I'm still waiting for the magic answer to this. If you don't get one, my suggestion is to pull really hard on the rope generating A LOT of tension. Maybe you get lucky and it dislodges. But if not, c
I personally never climb, erect, nor recommend house bracketed Rohn 25G. It's a disaster waiting to happen. I agree with the comment that if you have to do it, make the last section the one that is b
Ted, The SWR at your radio is a function of the antenna AND the feed line. Don't assume the antenna is the problem. If you can measure the antenna at a known half wavelength transmission line point,
Gary, I am very sorry for your loss. Obviously, being in Vermont, I am not able to take advantage of the opportunity. One thing to note - it looks like there is a Power Line VERY close to that antenn
Martin, Its really first about expected loss for 30 Mhz - isn't it? Why put 1KW into a cable that has loss of 1.8dB per 100 ft? How long a run are you planning? Ed N1UR -- Message: 1 Date: Sat, 6 Jan
Even if an inspector comes out, they would not necessarily care that there were clean box edges. They would be typically looking for "lot line set back adherence" of an auxiliary structure as well as
?I have never had a direct fed Inverted L with an SWR that good or that broadbanded. I would be concerned.? John KK9A I would agree with John. Sounds like either some tower interaction ? which could
I don't find that the "point the beam skyward" method works that well on 40M beams for doing the initial SWR test. The typical 40M beam is a loaded element and on a boom that is usually 20 - 24 ft lo
I agree completely with KQ2M. I did virtually the same with my set up as he described. Although I did end up paying for wait time for the Concrete truck of about 2 hours. Well worth it. Ed N1UR _____
The ones I have seen were home made. 12 or so ft of building construction grade steel I beam with a few guy attach holes drilled near the top of one end and a couple of holes for some steel rods to b
John KK9A stated "Excellent point Steve and very well stated. The Cushcraft is a good upgrade to an inverted V but it definitely has compromises. I use OptiBeam 40m beams which have high Q coils and
Personally, I use MMANA Basic a lot of the time. Very simple to place vertical elements in free space to understand the relationship on phasing and spacing. Simply define the 2 ends of each wire/elem
Sad to see and hear about. Looking at the pictures, one guy attach point is completely clean of guy wires. And the guy wires do not look good. The fall was all in one direction. Suggesting that somet