a low band antenna
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Antennas : 20M : 20 meter Dipole Antennas- 20 meter short loaded vertical antennas
- Loading is a way to lower the resonant frequency of an antenna radiator. This technique is typically used in antennas that have radiating elements that are too short for the desired resonance frequency. In this excellent article the author experiment loaded vertical dipoles for 20 meters band
[ Hits: 232 | Votes: 1 | Rating: 9 ]
- 6 metre SOTA Antenna
- A simple and light vertical coaxial dipole for 50-52 MHz band, designed for portable SOTA operations based and inspired by the VK2ZOI flower pot antenna
[ Hits: 165 | Votes: 0 | Rating: 0 ]
- Building the 6 Meter Moxon Antenna
- A moxon antenna for the 50 MHz build with 19 feet of 14 AWG copper wire, and based on a set of PVC pipes.
This is an easy to build project that will give you an efficient directional antenna on 6 meters band with low SWR on more than 1 MHz bandwidth.
[ Hits: 507 | Votes: 4 | Rating: 7.75 ]
- LFA Yagi Antenna for 6 meter band
- This antenna is reported as being lower noise than conventional yagis and had a very low SWR for 500 KHz.
[ Hits: 200 | Votes: 3 | Rating: 7.33 ]
- How to Blow Up Your Balun
- In this article, author examine stresses placed on common-mode chokes (aka baluns) as hams use/abuse them, examine the efficiency of simple dipole multi- band antennas and their feed systems. Stressing a Balun.
[ Hits: 387 | Votes: 0 | Rating: 0 ]
- About The Beverage Antennas - Receiving Antennas
- An article about the Beverage antennas, super long wire receiving antennas thar are unidirectional and have a very low noise that makes this antenna excellent for low band dxing. By Thomas R. Sundstrom W2XQ, 73, June 1981, 73 Magazine
[ Hits: 185 | Votes: 1 | Rating: 10 ]
- Short Monoband Dipole Antennas - KGD Antennas
- The KGD antenna is an option for those with space restrictions. The idea behing this project is to provide a short dipole antenna for HF Bands and to allow operations on HF bands when its not possible to setup large antennas, using these short base loaded dipoles.
[ Hits: 240 | Votes: 0 | Rating: 0 ]
- Multi-band End-Fed Antenna
- An excellent guide to homebrewing multi band end-fed antennas. The article, embed several drawings including diagrams and detailed pictures, illustrating the basic funcionality of end-fed antennas. The author gives some basic hints on how to build a half size antenna for 80 40 to 10 meters and a 6 meter to 40 meter configuration. It is also well described how to build the impedance transformer and the loading coils for lower bands.
[ Hits: 1105 | Votes: 6 | Rating: 4.5 ]
- Transformers for low-bands antennas
- Transformers can be used as part of a hybrid combiner or as phase inverters for an RX antenna array.
[ Hits: 153 | Votes: 2 | Rating: 5.5 ]
- Portable magnetic loop antenna
- A portable loop antenna, made with a 3 meter loop resonates with the chosen capacitor from just below 7MHz to about 28.300MHz which makes it usable on the bands from 40m to 10m.
[ Hits: 167 | Votes: 2 | Rating: 9 ]
- Magnetic Loop for 20 meters band
- A magnetic loop antenna designed for 14 MHz.
This kind of antennas is also known as STL, small transmitting loop and can be an excellent solution when you are not allowed to put antennas on your roof
[ Hits: 204 | Votes: 0 | Rating: 0 ]
- Balcony Mounted Buddistick Antenna by KP4MD
- The antenna handles 250 watts and covers 40 through 10 meters, with an optional add on coil for 80 and 60 meters. The author in this pages includes an interesting video in which describes the antenna setup, and the importance of the shunting coil on lower bands like 40 and 80 meters. SWR curves diagrams are also included and demonstrate the influence on resonating frequency of the shunting coil.
[ Hits: 281 | Votes: 3 | Rating: 10 ]
- Half Sloper Multiband Antenna
- A presentation of a HF multi-band sloper antenna. This antenna project is for low band operations, and antenna presented in this article works on 40 80 and 160 meters band. Article is in Polish.
[ Hits: 793 | Votes: 5 | Rating: 7 ]
- T2FD Antenna - Terminated and twisted folded dipole
- T2FD is a 600-900 ohms folded dipole, terminated with resistor. Feed impedance is coupled with 50/600 ohms voltage balun. It is a wide band antenna with rather low SWR over the full designed frequency range: antenna tuner is seldom needed.
[ Hits: 486 | Votes: 0 | Rating: 0 ]
- The Easy Way Antenna Systems
- This document is a must read for anyone considering building a good low cost HF multi-band antenna system.
The author combine in this document four important ingredients to produce simple but effective antenna system, like antennas of non resonant length, line attenuation, the transmatch and the balun
[ Hits: 632 | Votes: 2 | Rating: 4.5 ]
- Semi-automatic antenna tuner project
- Thsi article describes a microcontroller driven semi-automatic antenna tuner capable of handling power levels up to 150 watts. The device is a low pass filter tuner manually tuned by setting the optimized L/C combination by hand and then storing the values into the EEPROM of the mictrocontroller to recall them later (seperately for each band from 80 to 10 meters including WARC bands)
[ Hits: 291 | Votes: 0 | Rating: 0 ]
- W3DZZ Multiband Antenna
- An easy to build and extremely high performance antenna, works perfectly on all HF bands 3.5-28 MHz with some compromises, it is basically an half wave dipole for 40-80 meters, an LC circuit or trap 40 meters allows you to use a single radiating element.
[ Hits: 464 | Votes: 3 | Rating: 7.67 ]
- Antenna Calculation Software
- The program consists of tabbed pages for various antenna and transmission line calculation. You can compute the values for an inverted L network that will allow you to match the 50 ohm output of the radio, or you can compute the necessary length in the units of choice for a 5/8 wave vertical for 10 meter band.
[ Hits: 435 | Votes: 1 | Rating: 10 ]
- AN-SOF - Professional Antenna Simulation
- AN-SOF is a professional comprehensive software tool for the modeling and simulation of antenna systems. AS-SOF allows to describe antenna geometry, Choose construction materials, Describe the environment and ground conditions, Describe the antenna height above ground, Analize radiation pattern and front-to-back ratio, Plot directivity and gain, Analize input impedance and VSWR,Predict antenna bandwidth
[ Hits: 242 | Votes: 2 | Rating: 10 ]
- Transverter for 50 70 28 MHz
- This multiband transverter project features power output at 13,8V 50MHz 15W, 70MHz 10W, second harmonic <65dBc. Single N connector of antenna, suitable for a dual band Yagi. Article include Block Diagram for Dual Transverter and low pass filters
[ Hits: 153 | Votes: 1 | Rating: 10 ]
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