( the measures and drawing )
The antenna that I'm going to describe, is an elaboration of an
treated thirty years ago by I1VCF photographed by 'Handbook American
and proposal to the readers of R.R.
, Who originally worked on 10/15/20 meters.
This antenna is about the simplest imaginable:
The problems are, as always in matters of self-building, law and
mechanical critical points: attack mast boom, boom elements,
my case, all the material
go to list, with their diameters, were adapted as
existing equipment in the basement (but you can do better) and
The boom: in my case, I found a rectangular piece diameter
of tubular aluminum with a diam.
35x2, 5 mm.
will form the total length of the boom.
The two sections of the boom will go along with stops once it reaches the required length (hold 10 cm. more per part), with screws.
Attack on the boom: the attack of the boom to mast plate is the
aluminum 400x150x5 mm.
which will be
drilled accordingly to
Whatever the type of boom used, not fixed to the boom in the bracket
achieved, but be sure that, with the jumpers used, the boom can
Elements: all the elements will be of a diameter sufficient bear the weight at both ends of the winds, or snow, which meet. For these reasons, the central parts of all elements are Dia. outer 35 mm. reinforced with diam. approximately 40 mm internal x 50 cm., then climb up to a minimum diameter of 15 mm. and however make sure that the sections of the larger diameters remain inside diameter while the thinner outside, but with such lengths to form the minimum possible hanging.
If it proves impossible to achieve a structure, at least for the
of 18 MHz, fairly straight, place a number of central rod,
The elements will be drilled in the center, at the point of reinforcement, to make stay jumpers (always those for TV diam. 45 mm internal x 5 mm.) attachment to the boom.
Radiators: as to the radiators, you need a rectangular tubular diam.
1 m long, that will support the
elements and insulators stay the same.
The items will be drilled at two points per game to assemble the support, as well as insulators.
It's actually more complicated to explain, than done.
Radiators is advisable to stop at about mt 2.50 from the
center, with a
couple of blocks placed in vertical and drilled because of diam.
Once mounted it up, take the central staff, will rise
the antenna from the ground just long enough to realize where it
Power: In the center, the point of power, put a baloon
1:1 of any
invoice or size.
Good DX to all ! IK4DCS