BTW, a foot switch is more than recommended, it's pretty much a necessity, although one could get by with a toggle switch. You need both hands to handle the rope while the load is moving. Just to mak
Grant, I can only say that if the sudden load movements and other undesirable occurrences you describe were common happenings in the tower industry using industry standard catheads, they would not be
Sorry, I read quickly and thought you were talking about capstans in general. I've never been a sailor. Been on a few wild rides though, and appreciated the skill involved. There was one notable acci
You would think so. But guy wires (and turnbuckles) seem to be under a different dynamic situation than nuts and bolts in a motor for example. Vibrations are relatively slow, and tension never nears
Sure, because they are trying to minimize concrete. A huge block of concrete always works, the same as a big tower works in place of a little tower. I'm trying to envision a situation where replacing
Yep, Sonotube or the equivalent is the only way to go for short piers (5'-15') or pad & piers. And you don't need to remove it - it eventually just goes away. They are amazingly strong and come in ev
Doug, Heliax uses closed cell foam so the dielectric itself doesn't wick moisture, but there are voids between the dielectric and shield that can wick water. You must ensure a seal at the ends of cor
Commercial tower grounds are almost always cad-welded, but usually to the heavy base flange(s), or to heavy tabs already welded to the tower expressly for the purpose of grounding. I've seen some cad
Suitably sized, tinned split bolt connectors on low diagonals or horizontals might be a good option in these cases. -Steve K8LX On 10/17/2017 4:20 PM, Keith Dutson wrote: Same here. The lowest bolts
Many years ago I had a couple customers with 72' aluminum Acme screw towers. They always made me nervous as I let them down. NOT because I was worried about the screw failing, but that the tower itse
Key word: overloaded. Any tower can fail if it is overloaded. Any tower may fail if it is forced to perform outside its specified engineering limits. No kidding. Some towers have more headroom than
If the compression connectors you have are PPC (the only brand I'm aware of), they are for LMR400 solid center conductor cable, not for stranded center conductor RG213 style cables. If you use them o
On 10/26/2017 1:06 PM, Jeff DePolo wrote: With all this talk of water migration, I'm surprised there is no mention of Trilpgy cable. They guarantee it against water migration! They do not have a good
When I converted from suspended feedlines to buried, I decided to place them below the frostline, which is around 36" in these parts. I only had a total of around 700' to trench, but needed to get mu
That's the key (one of the keys :-)). Or some other way to hold one side immobile while you align, twist, tap, and wrestle the pieces together. It's worth the effort to mate them together with the lo
2-1/4" Heliax. We installed a bunch of it on cell sites, but the customers finally figured out that it was overkill. Bump the TX power up a bit if you like, and install TMA's (tower mounted pre-amps)
If it's to be a one person device, the person needs at least two arms - one to hold the board, and one to pull the scale. The method should work fine, especially if a one-time calibration on EHS coul
I know that this discussion started with a question about wire for an antenna to be used in Belize, but people are reporting what they have used in the US. Does anyone actually take note of the NEC (
We'll, not to put too fine of a point on it, but if the wind is IN-LINE with the booms, and both booms are on the same side of the mast, there will be some amount of additional rotational torque that
It's somewhat related to the type of cable used. Since I started using CAT5 cable for pulse sensors, I've never had trouble on long runs with missed or extra counts. -Steve K8LX _____________________