There are a lot of different tower types, 3 sided, 4 sided, steel, aluminum, tapered, straight... And within those, there are different sizes, depending on how much antenna and how tall. If you can figure out who made your tower, it will help you find stuff that would work with it.
There is a lot of tower stuff available in the ham radio world. If you have the right size tower for this particular unit would be a piece that uses the tower tubes a guides and rides up and down the tower with a rope:
Texas Towers has quite a bit of tower related hardware. Another vendor that has a lot of tower hardware is:
Another one is:
If nothing else, you might get some ideas on what is being done.
I have an antenna tower in concrete behind my garage that has my local tv station antenna. It is a big yagi type antenna. It has been there, both the antenna and tower, for 12 years. I am getting a little older and dont have any help and to be honest, dont like climbing up it. I think the tower is 25 feet ot so from it's top to the ground.
Would it be possible to make a hinge for this thing so I could bring it down to replace the anteena? Can I do it now that it is already errected, maybe loosening at one of the sections and pulling it off, installing the made hinge then putting back on? Would I be able to lift the tower and antenna by myself once it is pulled off to install the hinge. I appreciate any help.
I have considered similar for raising owl boxes, and raptor perches. My thoughts come down to three pad eyes, the center one being on the base of the tower, the other two, set into a concrete base, all three match drilled through, and secured by a heavy bolt. A pad eye is a D shaped piece of metal, but can be long, with the hole drilled in the D. You've seen them as lifting points on machinery. The one on the base of the tower would fit between the two set in the concrete.
Lifting and lowering would have to be done with a winch or a vehicle, and a three point guy system would make it steady.
Lowering the antenna in the first place for installation of the hinge part would be the biggest process.
Raising would consist of leaving the two guy wires in place, and pulling on the third, but using some sort of helping member to make the pulling cable pull upward slightly rather than just horizontally. The two permanent guy wires would hold the antenna safely in place while lowering and raising with the third detachable one, once you have them to the correct length.
It would be some work at first, but then very easy to raise or lower it. Align the hinge to bisect the line of the two stationary guy wires, and the third perpendicular to that on the other side, all the same length. They could be all the way to the top, or just 2/3 of the height, and be steady.
Take some pictures and share. Perhaps someone who has BTDT can give you better advice, or another way if you post some pics.
The only possible scenario is if the tower has guy wires. They could be loosened a little at a time and the tower jacked up in place and a short hinge piece bolted in place. It would all have to be made custom for your situation.
There are a lot of ways to do it and a lot of types of towers that dictate the correct way to do it for that tower. Honestly, 25' is an extremely short tower so climbing it really shouldn't be a concern. Just buy the correct safety harness and "Y" 100% tie-off lanyard (~$100 or so total) and get on with it with far less hassle than trying to re-engineer the tower.
the mast of my catamaran is shorter than that. it has a base hinge. a couple of guy wires attached to a pair of small boat trailer winches, a pair of mast base hinges, and releasable pins on the other legs would do this.
I wondered if I could make a steel base with three pieces of tube bigger than the tube on the tower that would fit into the new tubes if that makes sense. My tower is the three sided stuff and I think it is steel but it may be aluminum. It is gray colored.
Also, it is hard to climb up it with a 10 foot long antenna in your hand.
My tower is up againts the back of the garage with nothign else nearby really. I do have an attic area above the garage. What i made a braket out of angle iron with a pulley, atteched the braket to a couple of studs through the attic wall. I have brick around my garage footer/ foundation. COuld I mound a hand crack winch directly into the brick/ block with concrete screws. Then run the winch rope/cable up through the pulley and attaching the middle or top part of the mast. With a hinge at the bottom of the tower, I could use the winch to raise lower the mast? Just thinking out loud.
Climb the tower with a piece of rope attached at one end to your climbing belt and the other end to theantenna (somewhere forward of the CG. When you get to the top, secure yourself and pull the antenna up to you. Do all the connecting work at the top. If you are replacing an antenna, just drop the old one off, unless you are planning on keeping it. In that case, use a piece of rope twice as long as you need with the center attached to the belt. When on top, attach the lose end to the old antenna and loosen it and lower it to the ground then pull the new one up and install it. If the antenna is very heavy (most TV antennae aren't) you can use a gin pole with a pulley at the top to pull up the antenna and lower the old one. Sounds like you may have Rohn 25 tower. I've been up and down those for years. Just think SAFETY FIRST.
Sure thing - but I'd mount that winch to a backer board (2X12 ...) well secured between studs instead of the brick . Then use two lengths of pipe/tube to brace it upright . Spread 'em apart like a towbar to form a triangle .
le, but it has been in use for hundreds of years and
Since you showed photos of good examples, my TV antenna is a variation of a sliding Gunter rig:
The fixed mast is attached to the house and extends about 4' above the roof, with a guyed extension connected by a shiplap joint and bands. The "gaff" upper section of antenna mast tubing has the rotator at the bottom, attached to the track slide by a hinge, and the antenna at the top. When I remove the upper extension and fully lower the gaff part I can reach the antenna from the roof.
The halyard that raises it runs through upper and lower double sheave pulleys, vertically in line for a lower profile, so the pull is small enough to handle easily with cold bare hands in an icy night gale, ie when I most need to lower the antenna.
The upper guy lines run over pulleys on a ring suspended (to permit rotation) just below the antenna and down the mast to rope cleats. This way I can tension them to straighten the antenna tubing, which would be difficult from the outer ends of the guy lines.
For serious maintenance I can lower the slide to the ground and pivot the antenna tube (gaff) down.
It's hard to describe without a drawing, and not clear from the photos I've taken. I hope this is understandable.
I used to work on a crew of rig builders erecting and taking apart drilling derricks. Typical was a Lee C. Moore 147. Today, it is all very much heavier top driven units, and a floating gin pole is used. Yes, a gin pole, and a guy on the ground with a cathead would make very short work of that big a tower to bring it down. Then reassemble, make your hinge, put some adjustable guy wires on it, lift it up, adjust the two guy wires, add a third removable one, and be done with it. It would take longer to make the gin pole than to take down the structure.