In essence, it is about the thickness of the wall of the Al pipe. This also determines its strength. For 7 el. YAGY, an AlMg pipe of 28 mm is more than enough. Never anchor the pipe up at the antenna. The best, therefore the most ideal, is at a height of 2/3 from the ground. To connect individual parts, it is necessary to have spacers machined and screw them between the joints of the mast. In times of emergency, hard wood can also be used. A lathe is not needed. There is indeed a problem with disassembling the mast (in damp conditions), but a saw can always be found. Very good and rarely used are armored pipes. They are light and strong. They can be obtained throughsome electrician. In an emergency, it is also possible to use painting extensions, they sell paints and varnishes. It needs to be tested. Its length is approximately 2.5 m. It is necessary to secure the base of the mast against shifting and drilling into the ground. In times of emergency, a can from pâté is sufficient. For anchoring, use regular clotheslines.