1. Home
  2. Electronics Repair
  3. Crank up antenna tower question

Crank up antenna tower question

I just bought a three section 60 ft crank up tower from a guy for 200.00. I plan on cranking this up to about 45 feet and hanging an Alpha Delta inver ted V dipole, (80 through 6 meters) on it. The tower has a triangular hinge plate on the bottom which is connected to two of the tower posts with two bolts. This plate has three holes and it is supposed to bolt down to a conc rete slab that you pour. The slab has three threaded rods ( that look like about 1/2 inch diameter) sticking up. I saw this at the guys house but we w eren't going to try to take the slab. He said he had used about 5 bags of c oncrete but I'd feel better if i could see that in print...

To raise the tower you hinge the tower up (against your house I assume), al though I understand that some of these are free standing without guy wires! !,(I don't know how that would be possible with my tower), and then insert the third bolt into the base. He told me that he then had this secured agai nst the side of his house. I would do the same.

This tower has been sitting outside for a number of years, however the galv anized coating and cable is still good, and although the winch is pretty ru sty the the gears and ratchet assembly still work. for safety purposes thou gh I would really like to see the scoop on the winch, reversing mechanism a nd brake, and also the base.

I plan on lubricating it and installing this up against my house in the Spr ing, however I would really like to identify the manufacturer and perhaps g et a manual for it. The problem is I can't find any clue on this thing at a ll as to who made it.

To see a representation of what this looks like please take a look at the L M354 on the following site. It looks very much like what I have, but I real ly don't Know for sure:

formatting link

If anyone has any experience with one of these type towers I'd really appre ciate any advice. Thanks very much, Lenny,

Reply to
captainvideo462009
Loading thread data ...

A-frame/sheer-legs are useful for this sort of activity

Reply to
N_Cook

On Monday, October 5, 2015 at 10:55:33 PM UTC-4, snipped-for-privacy@gmail.com wrote: to take the slab. He said he had used about 5 bags of concrete but I'd feel better if i could see that in print...

If you really need 2.2 cubic yards like your diagram says, you need about ninety 80 pound bags, not the 5 you mentioned. One bag is about 2/3 of a cubic foot, not yard; a yard has 27 cubic feet.

You'd be dumb to mix it. Delivered it's only about $100 - $150 a yard, if you can get a concrete truck to deliver a small quantity.

Reply to
Tim R

another place to look is "Rohn" towers. crank up and tilt over

Mark

Reply to
makolber

at I have, but I really don't Know for sure:

The PDF of the tower shows a base for a free-standing tower. You are not putting up a free-standing tower if you attach it to a building. Your challenge will be to get it positioned so you can attach it to the building. What type of bracket do you have?

I just finished putting a short Rohn 25 tower against my pole barn shop. I fabricated a new hinge base so I could tilt the tower up against the barn with a flat side fastened to the wall. The Rohn hinge base would have put a single pipe against the wall and my base allows two pipes to be fastened to the wall.

Not being free-standing, you only need enough concrete in the base to be sure it is below your local frost-line, so freezing water doesn't push up the concrete. My base used 3 1/2, 60 lb bags of premix concrete. It is not below the legal frost line, 3 ft, but is right next to the wall and concrete floor of a heated shop. Be sure to add crushed rock to the bottom of the hole for water drainage.

Paul, KD7HB

Reply to
Paul Drahn

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.