Home Brew Stand Alone Mast

By Peter EI4JR

Click on pictures for larger view

     

The hole is 1meter square. The welded base frame is placed in the hole. Note the 2 angle irons are used to get the frame level and removed as the concrete hardens. I raised the frame a little higher to make it a little higher (30cm) than the ground level. the the 4 x 20mm securing bolts are 535mm apart and 60mm sticking out the concrete.

     

The rotator cage was welded onto the inner box tubing and the base was tacked together at this stage. The tilt over plates were made and welded to the 100 x 100  box section.

     

The assembly started on the bench where the tilt over winch was fitted only temporary at this stage and the bottom pulley wheel brackets were made and welded in place.

     

With the base nearly finished and standing 2400 high is very heavy at this stage. It was time to make the brackets for the pulley that will raise the inner box section of the mast. This was welded to the outer box section. The inner box section was fitted into the outer tube after a 10 x 100 slot cut into the bottom of the inner box section and 12mm fixing rod was put through a hole drilled about 20mm from the bottom and welded in place. This allowed the 6 or 8mm steel rope to be secured inside the tube and allow the rope to pass between the inner and outer box section.

     

The inner box section close to the bottom had packer pieces welded to stop the bottom section of the inner mast from rattling also another packer welded 1 meter from the bottom of the tube. This is to stop rattling and also is used as the safety stop. We don't want to wind the inner section completely out do we.

The top section of the inner box section pulley wheel brackets were welded into place allowing  the pulley wheel not to touch the inner section. 6 threaded bolts after drilling and tapping were fitted as shown. This is fully adjustable as to take out any rattling and bolts can be removed to enable you to remove the inners section also use as one of the safety stops.

 

Getting close to the completion stage and brought outside to do a little testing

The testing went well winding the mast up and down. It was temporally lashed to the forklift just in case. We will need to wait until the base is bolded down to do the tilt over. I cant see any problem here.

        

The mast is now ready to to be fitted after being galvanised to protect it from rusting.

        

All up. Guy ropes fitted and ready for the antennas

Plans for the Stand Alone Tilt Over Mast in PDF

The mast was built at Glenside Ironworks by Sean Kearney. With a little help from Peter EI4JR

Glenside Ironworks. Glentogher. Carndonagh. Inishowen. Donegal. Phone Sean (074)) 937 4010

These masts can be built for you by Sean If you are interested in having one built give him a ring

 

www.echoireland.com