Sorry for responding to such an old message. I've had 44 feet of Rohn 25 housebracketed for eight years now. It is right at the corner of my house, bracketed to the top of the wall where my bedroom i
If you go the bag mix route -- rent a small mixer from your nearest home improvement store. These typically hold two bags of mix (along with 7/8 gallon of water per bag). You can mix two bags in a co
In my recent experience in building trap dipoles, you can consider the 30m length as stopping at the trap. You can find the articles on building trap dipoles on my blog below. Bill Coleman, AA4LR, PP
Sorry to respond to an old message. I'm not sure why you need to use a 3 foot square base. For a bracketed tower of Rohn 25G, you can use a 2 ft by 2 ft by 4 ft base, which is also the standard for g
Sorry to respond to an old message. I built just such a dipole last fall. I wrote it up on my blog here: http://boringhamradiopart.blogspot.com/2010/02/trap-dipole-for-8040m.html Mine came up to be 9
It depends on what vibrates. My installation is generally very quiet. If the wind gets over about 40 mph, you can hear a bit of subsonic vibration. I did have a problem with a feedline tapping on the
It really depends on the shunt-feeding arrangement. Some can get by with a single shunt capacitor, others use an omega match, still others use L or T networks. It really all hinges on the complex imp
For those heat-resistant tower installations. Just remember, you can't use cadmium based tools to work with titanium hardware. Scratching titanium with cadmium weakens the titanium. Bill Coleman, AA4
I haven't seen anything commercial for this type of configuration, Seems like you could get a couple of high-power tuners and do the same kind of thing. I think Ten-Tec made a high-power reversible L
If you have more than one cubic yard to pour, I would strongly suggest a ready-mix concrete service instead of trying to mix your own. If you have less than a cubic yard, you might consider doing it
Perhaps a Quagi design would suit a Quad Driven-Element and Reflector, followed by multiple dipole directors. George William Coleman mail: aa4lr@arrl.net Senior Software Developer phone: 770 978-0196
I have an A3S with the A743 40m attachment at about 50 feet off the ground. I recently purchased an A50-3S and am considering mounting it on the same mast about 6 feet below the A3S. Is this spacing
Well, six feet is all the mast length I have to work with thats as far apart as I can put them. Bill Coleman, AA4LR, PP-ASEL Mail: aa4lr@arrl.net Web: http://boringhamradiopart.blogspot.com Quote: "
Perhaps UHDPE plastic cylinders would do as well as fiberglass? Bill Coleman, AA4LR, PP-ASEL Mail: aa4lr@arrl.net Web: http://boringhamradiopart.blogspot.com Quote: "Not within a thousand years will