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From: nbf5z
Date: 26 Nov 2001
Time: 21:03:24
Remote Name: 170.215.214.149
Hello The best way i find is to take a ginpole head that's the top if you do not have one you can just buy the head from a tower supply. You want to make sure you use galvanized water pipe no longer than six feet on a big antenna the head will only fit up to two inch od pipe so inch and a half is the biggest you can go the outer diameter is a little over a inch and three quarters two inch is to big i hope you have a tb4 trust bearing that is a monster . you should have a as25g accessory shelf get a piece of two by two inch angle iron and mark one side of the holes off the plate to the angle iron and drill them out buy a two inch u bolt and center it to the angle and drill out. Bolt the angle to the holes on rotor plate drop mast down and bolt it to u bolt drop your rope or cable down the pipe its easer to use a cheap hand winch on bottom of tower with at least five thirty two air craft cable take your real big antenna and make sure you center the boom plate to boom for perfect balance. the ropes that keep the boom stright tie them together real tight take the aircraft cable or rope make one knot in center of boom rope and leave five feet of over hang and pull the boom ropes up or cable so the boom is pulling a little up and get a idea were to set your cable or rope through the top u bolt holes of the mast plate hope fully you use aircraft cable bring it back to the stright cable and use at least three thimbles. Tie a rope through the bottom mast plate u bolt holes and have a friend hole the antenna rope pulling on it so it clears the tower while you winch the cable or pull the rope the antenna will go up fine when it gets to top it will go right to mast if not using a winch tie off the rope when you get it were you want climb the tower and put the bottom ubolt in first leave the cable on untill you get the boom ropes on the right way and than put on your upper ubolt make sure the trust bearing is real tight take the bottom ubolt out and the angle iron and put the top part of the rotor clamp on and lossen the bearing just a little raise the pipe enough so rotor fits. Tighten trust bearing real good put rotor in reset everthing and you are done. My advise is it's much easier if you use two rotor shelfs and two trust bearings you can cut a round whole in one plate and center it all with a ruler the rohn will only accept the tb trust bearings but you can use a 45mm yatesu trust bearing for the shelf and it will accept two inch mast and a lot cheaper for about forty dollors i hope this helps you take care JACK