Jim, Good analysis. That comes out to 67 ft/lbs for the H4 and 83 ft/lbs for the TT. I can understand that if there is a good wind on a long boom, multi-element antenna, both would struggle to get st
I recently poured a base for a 90 ft Sky Needle tower. The original plans call for a 4 X 4 X 8 ft hole. I believe current requirements are 5 X 5 X 9 ft. What's funny, this same tower that I own survi
Howard, The cable should be 8 conductors, and depending on cable run, 14ga or 16ga. There is no large current traveling in the conductors, mainly control signals. I have a 40 year old MA770 in the ai
Patrick, I had a case once of a shorted coax due to a manufacturing defect. The coax was a 100 ft piece. I had first cut off the connectors one at a time but found the coax still shorted. I cut the c
My situation happened in the late 60's when I lived in Africa. No such equipment was available then. Now, no problem, most of us have such equipment... Ray, N6VR, ex ZD3G ____________________________
Guys, I still climb limited heights (70 yo) and do use long extension ladders strapped onto the side of towers. When I lived in Calif., I purchased "The Rung Step" from a local paint supplier. Its a
I am about to start the grounding system for my 90ft free standing tower. I do have the Ufer ground / rebars connected to the tower. The next part is to run 'spokes' of ground rods out a distance fro
Thanks to all who made comments. My take away is to use more shorter ground rod runs from the tower, say 30 - 40 ft, than a smaller number of longer runs. I will see how many 30 ft radial runs I can
Now that someone mentioned the equilateral triangle, things begin to fall in place. Eight equilateral triangles fills the circle, following their sides and offsetting the grounds 9 ft and 21 ft as sh
George, Your're right, an equilateral triangle is 60 degrees. However, I decided to make my ground rod layout at 45 degrees to maximize the theoretical ground rod area coverage and minimize the overl
Hello Deni, I guy mine at the top of the first tubing joint, about 1.5m above the matching box. This is also just below the first set of stubs coming downward. It does blow in the wind, but not enoug
Rich, I replaced a medium size 71ft tower with a heavy duty 71ft tower several years ago. None of the existing six 1" bolts matched with the new tower base plate, 12 bolt holes. In a sense, I made ad
John, I wanted all the strength I could get using the adapter plates. The original tower base plate had only 6 - 1" mounting bolts, while the new tower plate has 12. Besides, I did not know mathemati
Was able to pick up some Lucent snap on ferrites, PN 407579622, from an estate sale. They are large, ID = 11/16", OD = 1 3/8" and Length of 1 3/4". I have found plenty of vendors but no info on their
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Thanks for the good replies and suggestions. As recommended, first thing for me to do is establish a noise background reference for my station. This would include readings at different times of day/n