I have the DX Engineering box and you are going to like the omni direction feature. I don't know if the Comtek box has that. With careful measuring and construction of the array, I am getting 30dB fr
I have metal field mesh fences in my 40m four square field and I don't see any problems. How far away from the fence is your array going to be? . I must be at least 60 feet from the fence at it's clo
Shouldn't you be concerned about the ground rod at your load center. The ground at the meter is more to do with the electricity company. You safety ground is at the load center. I have a 13kV run to
I've seen roofs that have been pulled loose by attached guy wires. You can do it but I'd be very careful about the engineering. A fellow TowerTalkian, Tony, K1KP, wrote a QST article some years ago a
I think guying the tower section will keep it nice and stable. Pour the first yard of concrete in slowly to avoid disturbing the base. Attach several levels to the tower legs so that you can easily m
and I made mine out of MOV's that I bought in bulk Mark N1UK I really don't understand, quite, how to protect myself from lightning coming down the various wires. I'm sure this will be crushingly obv
I read an article somewhere where the ham had some experimenting with the radiation angle of an elevated 1/4 wave vertical. As you raise the vertical you get lower radiation angles up to a point. Bey
Yes it isn't really a thrust bearing, more of a bushing. Goodness knows why it is called a thrust bearing! Maybe because it resists side thrusts. Mark N1UK OK, Im old. I keep seeing the trem thrust b
Tell him we miss him and are looking forward to his posts 73 Mark N1UK There is one computer in the rehab unit dining room. Roger called this evening to verify his password so he will be reading thes
Here is a start...this is the flat plate that the TB3 fits on http://www.3starinc.com/manuals/ROHN_BPL25G.pdf http://www.3starinc.com/rohn_25g_45g_55g_heavy_duty_thrust_bearing_r-tb3.html Mark N1UK A
4 holes of 0.56 inches diameter and the drawing shows the spacing http://www.3starinc.com/manuals/ROHN_BPL25G.pdf Mark N1UK Here is a start...this is the flat plate that the TB3 fits on http://www.3s
I have seen something like this when I had a bad coax cable. I think it was the braid connection in the PL-259. I now use silver plated Teflon PL-259's and a higher wattage soldering iron to make the
Could he not also ground through an rf choke to bleed off static? Mark N1UK Spark gap it is, then... Thanks for all the suggestions. 73/jeff/ac0c www.ac0c.com alpha-charlie-zero-charlie On 2/8/13 10:
See if you can get Dan K1TO..he is top notch and a great guy to work with. He did a wonderful job getting the Optibeam up on my tower. Mark N1UK If it is not out of line could I ask for input from th
Simple - make your own vertical "standard" with a plumb bob suspended from something (a step ladder perhaps) out maybe 50 or 100 feet away from the base and that will tell you which is vertical....
I installed sacrificial anodes to my buried guy anchors two years ago..time to check that they are still working Mark N1UK Take a look at some of these pictures! Corroded/rusted guy anchors causing t
I want to see patent numbers and read exactly what the patents otherwise it is all hot air and hearsay. Mark N1UK On 6/14/13 8:08 PM, K8RI wrote: On 6/14/2013 3:55 PM, Larry wrote: Patents are renewa
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em. Even then they use eggs in the EHS guys. A 40 tall utlility pole is already 6 feet into the ground. No anodes used. trenched, so that portion of the rod needs to be coated with roofing tar pitch.
I have copper clad ground rods near the guy anchors and the copper is going to want to strip the galvanising away as well.. 73 Mark N1UK Hans... In my experience this is not true. I have some photos