Wow, Bob! With just 175 lbs of wind load you would have exceeded the Rohn specs for 45G, and thats neglecting the additional wind load on the side of the tower. This corresponds to 7 sqft of wind loa
Norm, Based upon N5RP's anecdotal account of running 65' of 45G without guys thru two hurricanes, you are probably quite correct. His installation survived the equivalent of 3 times the manufacturers
I am trying to figure out how in the heck to get an M2 Orion 2800 "positioner" into Rohn 25. The 2800 has a triangular cross section which lends itself to fit inside a "rungless" portion of 25G such
Mike, It would appear that not all 3/8" X 6" turnbuckles are created equal. Per my November/December 1998 Texas Towers catalog, page 38: "The breaking strength of 3/8" turnbuckles is 6000 lbs" 3/8" X
Hi Steve, If I had my druthers, I would replace the 25G with 45G, but this is not to be. The installation is at a club station (inherited system). Guess it likes to eat T2X's. Haven't been able to ge
Gary, I am confused too! I measure about 6 1/4 inches in the gap between sections (distance between adjacent sets of horizontal rungs). I don't see how you slipped an M2 Orion 2800 into this space. M
Shane, Funny you should mention this, I got one from Texas Towers on Tuesday - similar story. I haven't checked the squareness of the legs, but in my case the accessory shelf is out of parallel about
J.P., I measured the bolt pattern on a TB-3 that our club has this afternoon. The mounting configuration consists of 4 holes arranged in a square pattern with centers on the circumference of a 5.375"
Dick, If you have a dummy load with a sampling port, substitute the TS-950 for the MFJ oscillator - this is quick and dirty way of turning your HF rig into a stable signal generator. Alternatively, y
Hans, I gave Stan's posting a little more thought and he is correct on all counts. You are correct if the gin pole rope is tied to the top of the gin pole. In this case, the gin pole must push up wit
Kurt, Pragmatically, you are correct, since the vertical load on the gin pole isn't really relevant to its ultimate strength. As Stan, W7NI correctly points out, the block and tackle will reduce the
While I have our KLM 40 meter 4el yagi on the ground, I am wondering if I should replace the stock KLM 4:1 balun? Does anyone know how these are constructed, how efficient are they, and how reliable
I seem to recall a product feature in QST a while back for some step attenuator housings. Does anyone know what company this was? Telephone number, etc? Please reply direct. Mike, W4EF...............
Can anyone tell me what the length is for the Rohn TB25 torque bars that go with the GA25GD guy bracket? They are not shown in the catalog and I am wondering if they create a larger or smaller cross
Jim, Unless your a using a Johnson matchbox (no balun), put the balun at the window interface and run a piece of 3/4" or 7/8" hardline the rest of the way. Mike, W4EF............. I would like to rep
David and Steve, If I recall my statics from college correctly, the deflection for a given applied load will be different if the Young's modulus of the two materials is different. A tower can be thou
Steve, Is the Polyphaser strictly a shunt element (gas tube to groundf)? If so, perhaps you can place it across the line with a "T" connector and still get protection. Mike, W4EF........... HI all. H
Dick, If you have a dummy load with a sampling port, substitute the TS-950 for the MFJ oscillator - this is quick and dirty way of turning your HF rig into a stable signal generator. Alternatively, y
It might be interesting to have Bill, W4AN put his web polling talents to work on a rotator reliability survey - e.g. what rotator/antenna combinations have survived (and for how long) and what rotat
Can anyone out there give me advice (anecdotal, analytical, or otherwise) on sizing a gin pole for structural integrity? I have a requirement to drop 24' of 1/4" wall 4130 chrome moly into a Rohn 25G