Simultaneous operation of yagis on a common boom. Interesting topic. But it has 'bad idea' written all over it. I don't care how much modelling or measuring you do. At best, you'll get a headache. If
Jose, There was an extended thread on a related topic, about two months back, having to do with windload calculation. In fact, greatest windload will probably result from the boom being broadside to
Recently, I consulted with the cap'n of a large charter sailing vessel, who had posted here concerning lightning protection. He was losing masthead instrument pods due to lightning hits. I recommende
Mark (TT): I think Craig Clark's word was "FUGEDABOUTIT!" To which I will append....how many BTU's can you cram in a double A cell? Further to that, in 10 years in Vermont, I also observed that my ra
NOT enough BTU's, Steve, if you're in a cold climate. I remind you, Steve....a cold day in CA is much like a Spring 'morn in Vermont. In -20....a 12v powered anything is inadequate. \Mike....where in
To Gary, who opined that corrosion and wear would render all SteppIR's useless in 5 years, and Brian (n1ik), who responded with the following, edited comments; -0- Gary. Good points. We'll just have
Steve's recent post of the pics from the MonstIR install were quite interesting. I wonder what effect painting the fiberglass tubes will have? N2EA _______________________________________________ See
I wasn't going to comment on this thread...but I think it's now in order... here's a concise snip of the previous (without attribution), followed by my comments: -0- Whiskers are an issue in reliabil
W2RU suggested: In order of preference: 1. Hire KC1XX 2. Hire a crane 3. Disconnect guy wires and lay the tower over in the next windstorm 4. Follow my procedure below -0- To which I'll append...talk
TWO POINTS TO BE MADE HERE... First...Jamesnf commented: "Frequently, on 80 meters, they use a four square vertical system and a low dipole yielding potent directional, low angle radition for dx from
W8JI's observations reminded me of some of the doubts I've had, when taking the lower yagi in a stack, and pointing it stateside. (Or, in w3gm's case, putting a 3el up at 25', fixed west & splitting
Gary (TT): FM Stations transmit circular polarization, which results in signals being 3dB down in any single plane, but less susceptible to selective fading/interference problems, particularly with s
I'm inclined to think that multipath was at the root of the variations...in the sense that a varying series of angular arrivals swept across the response of the antenna. This is pretty normal. (I've
Tom's initial post..heavily snipped: I plan to clear an appropriate radius about the tower to permit antenna rotation only. Given this situation, would a freestanding tower be preferred over guyed? I
If I remember correctly, this started with a question from a chap who is putting up a self-supporter which is too close to a power line. He asked if there were any problems with a safety guy. There w
Hi Tom, I see your point. Adding guys will distribute the compressive load over all 3 legs of the structure, rather than having it load only one. Even if the structure is pre-loaded with guy tension,
I am reluctant to extend this thread...but there's a flaw here, imho. I'll make this my last on the topic: I beg to differ. The function of sensible guying is to prevent the tower from reaching its m
I've been reluctant to continue this guying thread... but this really is slightly different...it's hbx/hbdx related: Yes Dave, *I* was one of those idiots who attempted using an HDBX48 tower to hold
Multiple suggestions of this idea... Friend here had one with KLM KT34 on top. Antenna was rotated by long mast to rotator mounted at base. No torque from antenna was transmitted to tower. Worked fla
Clearly, sheer winds from downbursts at leading edge of Tstorms can be catastrophic, and Chuck's tower was overloaded. BUT... If the guys had been connected using a triangular bracket, such as Rohn u