Antenna poles. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Antenna poles. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Antennas. Technology

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Any shortwaver who has dealt with building a two- or three-piece "square" knows how difficult it is to find suitable frame poles. It is necessary that the bars from which the poles are planed are free of knots. Otherwise, the first strong wind will negate all the work done.

In the manufacture of the antenna described by G. Spichak (UA1CL) in the note "Double Square" with a shortened traverse" ("Radio", 1979, No. 5, p. 26), I used dried pine poles. They are very light, withstand large wind load For those who decide to do the same, I will give some advice.

At the butt, deadwood (its length is 4 ... 5,5 m) should have a diameter of 5 ... 6 cm. The branches are chopped off, and the resulting poles are planed and sanded. It is advisable to treat them with an antiseptic or cover with drying oil. In no case should you wrap the poles with anything - in closed places, the wood will rot faster. It is also impossible to cut or drill poles to strengthen the "square" frames to them and themselves to the traverse squares - in these places they will break. Elements of "squares" are tied to poles with copper wire with a diameter of 0,7 ... 1,2 mm. At the base of the pole, notches can be made for knitting it with steel wire to the squares.

Literature

Radio 1/89, p.24-25

Publication: N. Bolshakov, rf.atnn.ru

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