sw antenna

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sw antenna

298 links - and 3 categories

Antennas : 40M
  • A comparison of 40 meter beam antennas - This page describes a comparison study on seven different beam antennas for 40 meters band. Yagi antennas, moxon antennas, mini horse all antennas are described with schema diagram , azimuth plot and SWR F/B Gain diagram
    [ Hits: 266 | Votes: 0 | Rating: 0 ]
Antennas : 6M : 6 meter Moxon Antennas
  • 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: 505 | Votes: 4 | Rating: 7.75 ]
Antennas : 6M : 6 meter Yagi Antennas
  • 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: 199 | Votes: 3 | Rating: 7.33 ]
Antennas : Baluns
  • BalUn for Delta-loop & Quad-loop antennas - This Guide helps you to build the 1:2 BalUn 600 Watts DIY kit step by step. If a delta-loop or quad-loop antenna is powered with a coax cable from the transceiver it is necessary to use a 1:2 BalUn. This 1:2 BalUn uses a symmetrical 1:2 impedance transformer.
    [ Hits: 285 | Votes: 1 | Rating: 9 ]
Antennas : Beverage
  • Beverage switch-box - A home made Beverage system for portable use. The goal was to switch between 4 single Beverage antennas without interfering on the other receiving stations.
    [ Hits: 114 | Votes: 1 | Rating: 8 ]
Antennas : Coils
  • Loading of Short Antennas - An interesting article on loading short vertical monopole antennas, representing six different methods. Base loading, Center Loading, Top Loading, Continuous loading, half and half loading and capacitive top loading.
    [ Hits: 678 | Votes: 4 | Rating: 6.25 ]
Antennas : Fan Dipole
  • Fan Dipoles 10/15/20m and 12/17/30m - How to build Fan-Dipoles by DK7ZB. Experiences with various band combinations. Not all combinations are working properly. If the frequencies are to close together the impedances will lead to a very bad SWR. This happens with the bands 10-12-15m or 15-17-20m.
    [ Hits: 482 | Votes: 2 | Rating: 9.5 ]
Antennas : Indoor
  • 20m Indoor Loop Antenna - This antenna can gets you on the air on 14MHz, and it has a useable frequency range. The VSWR is almost perfect at the centre-frequency abd the design uses no expensive components.
    [ Hits: 664 | Votes: 4 | Rating: 6.75 ]
Antennas : J-Pole
  • Simple J-Pole for the 2m band - A very essential j-pole antenna for 144 MHz. To adjust the SWR you will have to play with the 40mm distance between the coax feed and the braid inner conductor connection
    [ Hits: 173 | Votes: 0 | Rating: 0 ]
Antennas : Portable
  • 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: 279 | Votes: 3 | Rating: 10 ]
DX Resources : Contest : Contest Stations
  • Building a VHF Contest Station - Building an amateur station for competitive radiosport involves a number of critical steps, regardless of the band or bands you focus on. These include, but are certainly not limited to: Station layout, Equipment interconnection and switching, Inter-station interference, Antenna selection. Radio interface with the logging program, CW and voice keyer integration, Rotator control
    [ Hits: 327 | Votes: 1 | Rating: 4 ]
Operating Aids : History
  • Notable Patents on Antenna Design - Patents of most popular antenna models including Zeppelin Antenna, Beverage Antenna , Franklin Antenna , Yagi-Uda Antenna , Sterba Antenna , Rhombic Antenna , Turnstile Antenna , Folded Dipole Antenna , Coaxial Antenna , Slot Antenna , Discone Antenna , Quad Antenna Element , Log Periodic Antenna , Swiss Quad Antenna
    [ Hits: 285 | Votes: 0 | Rating: 0 ]
Radio Equipment : VHF-UHF Handhelds : Baofeng UV-3R
  • Baofeng Mic Pin Out and Programming Cable Schematics - Speaker Microphone Pin Out, Dual PTT Switching,Programming Cables, SMA Antenna Connection, Extended Antenna Threads for Baofeng UV 3, UV 5 Series handheld transceivers
    [ Hits: 1069 | Votes: 8 | Rating: 8.75 ]
Shopping and Services : Kits and Components
  • Hamtech - HAM-made engineering products supplies and produces coaxial relays, antenna switches, sequencers, roller inductors, variable capacitors, low noise preamplifiers, RF power rotary switches and coil bodies.
    [ Hits: 191 | Votes: 0 | Rating: 0 ]
Software : Antenna analysis
  • AN-SOF - Professional Antenna Simulation  updated - 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: 240 | Votes: 2 | Rating: 10 ]
  • NEC-Win Plus+ - Developed for beginners, hobbyists, and field engineers. Includes polar plots, rectangular plots for input impedance and VSWR, tabular data, NEC-Win Synth Light and Necvu 3D. Includes NEC2. The program also offers stepped-diameter corrections, Gain Averaging Test, CAD (.DXF) file input, 2-D and 3-D plots and antenna views, and graphical outputs. Run on older Windows version and is out of support.
    [ Hits: 311 | Votes: 2 | Rating: 4.5 ]
Technical Reference : Antenna Switch
  • Antenna Switch - An home made antenna switch with a Dummy Load selector. If you forget the radio is connected to the open or grounded side of the switch and you try to transmit, it is very easy to damage the finals of your transceiver.
    [ Hits: 318 | Votes: 3 | Rating: 8 ]
Technical Reference : SWR Meters
  • SWR and Amateur Radio Antenna Tuners - Undestanding and measuring SWR, Standing Wave Ratio in antenna feed lines. This article also introduce basic concepts and usage guidelines of amateur radio antenna tuners
    [ Hits: 218 | Votes: 2 | Rating: 9.5 ]
  • WiFI vSWR Meter - When building antennas for the Wifi band (Like the 8dBi omni), a need for an easy way to check the antennas arose. A Voltage Standing Wave Ratio (VSWR) meter useable at the 2.4GHz band is however, hard to find.
    [ Hits: 130 | Votes: 2 | Rating: 3.5 ]
Technical Reference : Test Equipment
  • Antuino - Antenna Test Equipment - Antuino is an accurate instrument that can be used in the field to measure SWR, field strength, modulation, etc. In the lab, it can be used to sweep filters, measure gain, distortion, frequency response, etc. It works upto 150 Mhz. On the third harmonic, it is usable on 435 Mhz band as well (with reduced sensitivity).
    [ Hits: 304 | Votes: 0 | Rating: 0 ]

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