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The stealth loop of Ciro Mazzoni has been designed to provide effective antenna to users with limited space. One of the objectives was to build an antenna that was not immediately recognizable as an antenna. The stealth loop covers a range of frequencies from 6.6 to 29.8 MHz (from 45 to 10 m), the maximum power is 125 W CW. Compared to an ideally mounted full -mounted dipole, the antenna has a signal gain of about 4 db less to 40m, and about 0.3db less out of 10m. The usable band that can be used without resintonization is about 5 kHz out of 40 me 25 kHz on 10 m. Usually a 1.3: 1 or better SWR is obtained. {
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The construction of the stealth loop follows the same principle as the well -known "baby" and "Midi" loops of Ciro Mazzoni: one side of the loop is fixed, the other side moves with a steppe engine around a joint. Both half end with interlocking condenser plates on the upper side, forms the tuning condenser of the magnetic circuit. Both sides of the loop are connected with a very large and flexible steel band that is connected to the frame with multiple screws for the best conductivity and the lowest resistance. The circumference of the stealth loop is about 282 cm, only slightly lower than that of the baby cycle. The size of the cycle is 137 x 50 x 26 cm, the weight is by approx. 10 kg. The cycle frame is professionally paid by 60 x 20 mm wide aluminum pipes. {
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The directional scheme of the loop is slightly directional to very low elevation corners and according to the frequency. At the larger angles of elevation, the model becomes almost round and without null values. Overall, the model also influences the position and conductivity of the ground under the antenna. The circuit should only be used outdoors, not inside a building. The minimum space for any solid structures should be about 2 m on the sides and above the antenna. Solid structures are walls, roofs, railings, etc. The positioning of the stealth is very flexible: you can place it both on the floor and on the roof of a car, on a balcony or a garden desk,Everything can be as long as the minimum is obtained a side game / top of 2m.
For operation, a two -wire control cable is needed as well as the coaxial cable. 5 m cable with connector are included. In the event that a longer cable is necessary, you can extend the length supplied or mount the connector on another cable. Included in the shipment is the automatic tuning unit (ATU 2.0) incl. Accessories. This controller offers the possibility to automatically follow radio frequency through cat control. In the semi -automatic mode it is possible to insert the frequency on a keyboard. The tuning process requires between 4 and 10 seconds, depending on the change of frequency.