polar

polar

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• A 5 elements Vee log-yagi for 10m - 5 elements "vee" log-yagi for 10m band- boom lenght : 4mt. Gain : over 10 dBd , f/b =over 40 db (deep null) f/b= min 20dB for different polarization signals
  [ Hits: 4609 | Votes: 11 | Rating: 7.82 ]

• 160 Meter Antennas at W8JI - 160-meter vertically polarized transmitting antennas center around this 200-foot tower
  [ Hits: 3964 | Votes: 1 | Rating: 10 ]

• 20m delta loop  ^pop - This antenna is fed for vertical polarisation, to give a low angle of radiation for DX and also a nearly omni-directional radiation pattern.
  [ Hits: 65721 | Votes: 69 | Rating: 6.71 ]

• A vertically-polarised VK2ABQ Antenna - design note by Brian Williams, GW0GHF
  [ Hits: 4972 | Votes: 11 | Rating: 4.19 ]

• 50MHz J-Pole Antenna  ^pop - Need a general purpose antenna on the magic band? The J-Pole is an easy-to-build and inexpensive device that provides an omni-directional vertically polarised antenna without the need for a ground plane. In technical terms, it is an end fed vertical 1/2 wave which is fed via a 1/4 wave matching stub.
  [ Hits: 33824 | Votes: 18 | Rating: 7.05 ]

• A Vertically Polarized Delta Loop for 40m - Practical contruction and designing notes of a delta loop for the 40 meters band
  [ Hits: 20492 | Votes: 16 | Rating: 3.14 ]

• T-Hunting Antennas  ^pop - 4 Element Cubical Quad, Yagis, LZA Circular Quad, Shrunken Quad , quarter wave, J-Pole, beam mounting , changing polarity
  [ Hits: 29360 | Votes: 26 | Rating: 5.01 ]

• The Lindenblad Antenna: The Ultimate Satellite Omni Directional Aerial - This Antenna project is a bit more complex than other omni antennas for satellite use, but it is much easier and cheaper than a standard tower mounted circular polarized azimuth and elevation rotating beam system.
  [ Hits: 442 | Votes: 5 | Rating: 6.8 ]

• A Hanging Rectangular Loop Antenna - A rotatable hanging loop antenna that has been specifically designed for hanging in a tree. Horizontally polarized with a broad azimuth pattern and gain of nearly 3dB over a simple horizontal dipole!
  [ Hits: 3867 | Votes: 10 | Rating: 7.41 ]
• The full-wave loop antenna - These omnidirectional antennas offer Horizontal polarization, and about 2.1 dbd of gain. They are much quieter than a dipole or a vertical, have a broader bandwidth and will usually out perform a dipole antenna.
  [ Hits: 5052 | Votes: 4 | Rating: 6.5 ]

• Hybrid Antennas - Antennas that use a combination of vertical and horizontal polarisation.
  [ Hits: 4712 | Votes: 2 | Rating: 6.5 ]
• Quad or Loop antenna - Information about quad and loop antennas, matching tips, differences on polarization and impedence by PA0FRI
  [ Hits: 920 | Votes: 3 | Rating: 4.33 ]

• Russian robinson club - Club Russian Robinson for amateurs interested in radio communication from polar stations, islands and maritime mobile objects RRC founded in 1993. Goals are consolidation of radio amateurs, operating now or operated in the past on islands, drift-ice research, arctic and marine stations, signing their personal callsigns or as participants of DX-peditions.
  [ Hits: 786 | Votes: 1 | Rating: 1 ]

• Dawicom - Manufacture of microwave directional, omni directional, sector and multisector antennas with horizontal polarization for ISM band 2,4 GHz
  [ Hits: 805 | Votes: 0 | Rating: 0 ]

• HRPT - NOAA HRPT - High Rate Picture Transmission, the main source of high quality data from polar orbiting meteorological satellites
  [ Hits: 665 | Votes: 0 | Rating: 0 ]

• Yagi Sterss - A full featured, graphical, user friendly program that performs structural analysis on horizontally polarized yagi antennas constructed from round tubing. YS can work in Imperial or Metric Units, and is likely to tell you more about a yagi antenna than you ever thought you needed to know. YS has been used by commercial manufacturers and premier station builders for over a decade by Kurt Andress, NI6W
  [ Hits: 5849 | Votes: 1 | Rating: 7 ]
• PolarPlot - Freeware antenna software that lets you see what the polar diagram of your rotatable beam actually looks like where it is operating. With PolarPlot you can measure the polar diagram of the antenna and check for abnormalities - compare plots taken before and after changes to the design or location - check the -3dB beamwidth - look at the front to back ratio - see the size and position of the sidelobes.
  [ Hits: 5986 | Votes: 10 | Rating: 5.59 ]

• MRP40 Morse Decoder  ^pop - Program to receive morse code via sound card, Windows 9x/Me/XP, it allows to transmit morse code from the keyboard. Includes a comfortable Audio Analyzer Display. Successor of known MRP37
  [ Hits: 48618 | Votes: 84 | Rating: 5.86 ]

• Simple Reverse Polarity Protection - This simple modification is applicable to pretty much any 12 volt operated, positive earth equipment. by Chris Cox, N0UK, G4JEC
  [ Hits: 1647 | Votes: 0 | Rating: 0 ]

• 5 Watt 40 Meters transmitter - This circuit is unique in that it uses a power mosfet as a final rather than a conventional bipolar transistor.
  [ Hits: 8445 | Votes: 7 | Rating: 5.29 ]

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