Amateur antenna lengths

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It is NOT an automatic fold-over, you must manually lift the element up out of the socket and lay the antenna whip down in order to enter garages, parking structures etc…. It is important that you lift the whip completely up and out of the socket before folding the hinge. The hinge rotates deg inside the socket so it will fold in the direction needed.

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Long wire antenna for portable operations. Under development With the view to establish a quick and easy multi-band antenna deployment for portable and camping operations a simple long wire antenna with an earth or earth plus counterpoise arrangement with a voltage unun including a tuner or simply with a tuner is one possible solution. With the voltage unun and wire lengths suggested in the below tables the antenna should present non extreme impedances for all HF amateur band frequencies.

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Here is a simple antenna calculator for two popular forms of ham radio HF wire antennas: the horizontal dipole and the inverted "V". Enter your desired frequency MHz of operation i. If you have no particular preference within a given ham radio band, then simply enter its center frequency i.

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Like a Yagi—Uda antenna "Yagi"a quad consists of a driven element and parasitic elements ; however in a quad, each of these elements takes the form of a loop of wire, which may be square, round, or some other shape. It is a further object of the present invention to provide a loop antenna having an even number of turns of a length of one or more wave lengths around each turn in which substantially no voltage components are present and the only voltage existing is that due to the impedance between the adjacent loops. We took about one hundred pounds of engineering reference books with us on our short vacation to Posoraja, Ecuador during the summer ofdetermined that with the help of God we could solve our problem. There on the floor of our bamboo cottage we spread open all the reference books we had brought with us and worked for hours on basic antenna design.

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Display all pictures. Invented by G5RV amateur, R. Delivered to assembly : 2 long wires, 2 insulators mounted at the end of the 2 wires, 1 ribbon cable connector SO UHF-Femaleassembly instructions.

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Dipoles are widely used on bands like 80 metres, 40 metres, 20 metres, 15 metres and 10 metres where they can provide excellent levels of performance. Building am HF ham band dipole does not have to be expensive. Often the items needed can be salvaged from previous antennas, or bought for relatively small cost.

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December WiMo announces the acquisition of the italian antenna manufacturer Ultrabeam. Ultrabeam Yagis are antennas, which element lengths are changed mechanically by a controller. This ensures that the antenna is always perfectly adjusted to the operating frequency.

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The simplest wire antenna for ham radio is a dipole, which is a piece of wire cut in the middle and attached to a feed line. The dipole gives much better performance than you may expect from such a simple antenna. To construct a dipole, use to gauge copper wire. It can be stranded or solid, bare or insulated.

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Just input the frequency and select the number of elements. I appreciate the simplicity yet very accurate calculations program provided with this app. For iPhone c.

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Antenna Design Programs--With surface mount technology and microcircuitry, most hams no longer build their own equipment. One area that is still open to amateurs is in antenna building. For a hundred years the amateurs have made more breakthroughs in antenna design than the professionals.

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