Ned The US Tower design engineer told me, when I asked him about my slack HDX 589 pull-down cable, is that the tension is set at the factory to allow for up to 300-350 pounds of weight load. Apparent
Ray When I was preparing my permit application for my HDX-589 I just called US Tower and asked for the engineering package. They emailed me a complete package in .pdf. 73, Steve N6SJ --Original Messa
If your soil is so sandy that your excavation will cave in, you may not be able to use the US Tower foundation design. Sandy soil might need a mat foundation or an upside-down "T" design. The US Towe
Randy If you can find a copy of Dave Leeson's "Physical Design of Yagi Antennas" (out of print) he explains how to calculate all the moments created by your combination of wind speed, boom/mast lengt
Remigio, the engineer at US Tower, told me to use beeswax. 73, Steve N6SJ Don't use grease. Bugs will stick over it and make if worse. Teflon multipurpose spray lube. ideas?? ________________________
All I am building a SteppIR DB42 on a TiltPlate on the ground, at the top of my cranked down and tilted-over HDX-589. I now need to decide how to route the cables. The bottom of the TiltPlate, which
Rex It depends on the ratio of Portland cement in your mix. If 5000 psi ultimate strength, it will be at well over 2500 psi in less than 10 days. If 2500 psi, it takes about a month. Are you going to
Mike I recommend you address your questions to Remigio Fernandez at US Tower. He is their design engineer and has answered many such questions I had about my recent HDX-589 installation. And you can
My tower is covered with State Farm as an "accessory structure" for 10% of the house coverage. No special rider required. 73, Steve N6SJ I suspect your insurance agent is misinformed ... *any* struct
Mike Talk to your local concrete supplier about the mix. If you add more bags of Portland cement, it will increase the final compressive strength. So you'll reach a higher strength after the first 7
Dave I have had a good experience using K7NV's after-market mast clamp on my OR2800 rotor. The mast provides much more surface area on the mast. They're not cheap, around $250. Check out his website.
Mike Sounds reasonable. I paid more here near San Francisco. If you have it pumped, ask the concrete supplier to use a "plasticizer" in the concrete mix. This makes it easier to pump without adding w
Mike Is there room to excavate around the existing foundation and key into it with new concrete? I have had to do this to reinforce large communications towers for microwave antennas, so I know it's
Conrad The only thing I would add is to use a heavy duty swivel between the pull rope and the bundle of cables you're pulling, to further minimize twisting inside the conduit. 73, Steve N6SJ Conrad,
Ian Make sure the smoke doesn't escape from the Lucas wiring! 73, Steve N6SJ Sure, but maybe not right now... I'm cleaning up the drips of oil from under the engine. 73 from Ian GM3SEK ______________
Can any of you recommend a wired anemometer or weather station unit? I want to install an anemometer to monitor the wind speed at the top of my tower. All I can find online are wireless units. On thi
Mike The contractors will usually recommend whatever is easiest for them to deal with. Did you ask your engineer about the sandy soil? 73, Steve N6SJ --Original Message-- From: TowerTalk [mailto:towe
Bruce When you say whatever your little heart desires, what would that be? Antennas for an SO2R contest station? DX pileup chasing only? Ragchewing with old friends? And what are your budget constrai
Byron Seeing a steady curve, if that curve wasn't there before Hurricane Ike, suggests the steel bent. You could have a structural engineer examine it and tell you if it is safe to use as-is. 73, Ste
Holy Cow... Reminds me of when I used to climb my 120' Douglas fir tree. Everything on the ground looks to small! (but not as small as these films!) The tree died and now I use a crank-up. 73, Steve