How long is a 80 meter dipole antenna?
Since an 80 meter dipole is approximately 130 feet long, and a 160 meter dipole is approximately 250 feet long, this space reduction can be critical in getting the antenna to fit into our typical backyards. Another often cited reason is that the inverted vee makes a better match to the typical 50 Ohm feed line.
How high does a ham radio antenna need to be?
A beam type of antenna at a height of 70 feet or more will provide greatly superior performance over the same antenna at 35 feet, all other factors being equal. A height of 120 feet or even higher will provide even more advantages for long-distance communications.
Is a balun needed for a dipole antenna?
The use of a balun will prevent the coax radiating any power or picking up any noise. In many practical situations it is possible to operate the dipole satisfactorily without one, but there may be a slight increased risk of interference if one is not used. Simple baluns can be bought from antenna suppliers, or made.
How far apart should ham antennas be?
The easy answer is that you should maintain a minimum mounting distance of at least 1/4 wavelength apart for the lowest frequency antenna within the same horizontal plane. For VHF antennas, that translates to roughly 19 inches.
How long should a doublet antenna be?
The Antenna: The antenna proper consists of a length of copper or copperweld wire, with a center feedpoint. Three popular lengths for the antenna are these: a. 130-140′ (best, if you have the room and want the strongest results on 80 meters.
What is linear loading antenna?
“Loading” is a way to lower the (primary) resonant frequency of an antenna radiator. It also raises the radiation resistance of the antenna, i.e., makes the antenna a more effective radiator. Linear loading, by folding a long radiator wire in a zig-zag form onto itself.
What is the best antenna for 80m range?
Frame Antenna for 80m – A frame antenna for the 80 meters band, built to be folded and to be easy to be mounted and dismounted. This antenna is suitable for indoor and QRP use, bandwidth is just 10kHz and should be observed a proper distance while transmitting due to high voltage.
Is this 80 meter full wavelength loop antenna for You?
This is post 2454 in a continuing series of simple ham radio antennas. If you have sufficient space and a few trees, then this 80 meter full wavelength loop antenna is for you. Rich Rodgers (WB5YBZ) does a wonderful job of describing this antenna he built for his home station. According to Rich, this antenna is resonant at 3.650 MHz.
Is 96 feet a good length for an antenna?
It is, however, a good length on an 80-meter doublet, as is 96 feet. Remember – desirable lengths are odd-eighths of the antenna’s fundamental. Exact length is not important, just avoid getting close to quarters and halfs.
Will a doublet antenna work on a 40 Meter Dipole?
A doublet antenna (dipole), cut for 80 meters, will not work on 40 meters because 7 MHz is an even harmonic multiple of 3.5 MHz. This means that if we try to feed 7 MHz to 3.5 MHz (80 meter) dipole, the 7 MHz current would be at a minimum (null) at the center feed point of the 80-meter dipole.