Wandering around in a local outlet store, I saw a hula hoop that that had almost the perfect size for a halo. The hoop or polyethylene hose as spreader Or solder the wires to a SO-239 chassis socket or attach ring connectors to a dipole center connector. You make it weatherproof with a little nail polish. Solder one wire to the core of your coax and the other to the shield. Then cut one of the two wires in the middle. You take half a wavelength of wire, a little over 3m (118″) in this case. For example 2x 0.75mm 2 (#18 AWG) is fine. I chose the circle shape for the 6m version. The classic halo is such an easy to build antenna. Making your own halo is so easyįor me personally, it’s difficult to understand why this type of antenna is not used more commonly as a limited space DX antenna solution. Such a square halo is also popularly called ‘Squalo’, a combination of ‘square’ and ‘halo’. Then the feedpoint impedance is still 50 ohms. In addition to a circular shape, the halo also works great if you place it in a square shape. I measured about 15% more compared to the halo with gamma match. In addition, the classic halo is more broadband than the modern halo. You can feed the halo with any 50 ohm coax. The classic halo is nothing more than a folded dipole, not stretched, but put into a circular shape, with some open space between the dipole ends. A modern style halo antenna for 6 meters. The other variant is the classic halo the antenna that was patented as the original halo back in 1946. It is easy to tune, but not that easy to build. The most commonly used variant among radio amateurs is the modern band halo with gamma match, mainly used on VHF. The principle of the halo can be applied to any amateur frequency, including 50 MHz. Next to that, 99% of DX stations use horizontal polarization. At only one wavelength above ground, the halo already produces a few dB more gain than a vertical antenna. In contrast to a vertical, the gain of the halo at radiation angles up to about 5 degrees (good for DX), increases with height above the ground. The halo is an omnidirectional radiator with horizontal polarization. In a previously published article I wrote about the dual band square halo for 10 meter and 20 meter band. Get ready to build your own classic halo antenna. With limited resources I mean a hula hoop, some speaker wire and SO-239 socket. You can do that with only limited resources. So you only thing you have to do is put that signal out. Those large directional antennas you see on QRZ.com can pick up weak signals easily. You would think that you need a large directional antenna to be able to join in, but that is certainly not necessary. From cubical quads to arrays of stacked yagis. On QRZ.com you see stations with large antenna installations for 6 meters. With multihop Es, DX up to 10,000 kilometers (6,000 miles) and more is possible. In the Northern Hemisphere from May to July and in the Southern Hemisphere from November to January.
This propagation occurs mainly in late spring and early summer. DX up to 10,000km and moreįor me personally, the most spectacular propagation on 6 meters is the annual multi-hop sporadic-E. The 6 meter band is therefore rightly called ‘The Magic Band’. But even in tropo conditions, where most radio amateurs switch to the 2 meter or 70 centimeter band, you can do surprisingly long distances on 6 meters. Meteorscatter and the almost daily present troposcatter. F2 propagation and aurora in periods of high solar activity. TEP (transequatorial propagation) around March/April and September/October.
There is no other band that is affected by so many forms of propagation as 6 meters (50 MHz).
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