1/4 wave

1/4 wave

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• KE4UYP Linear loaded vertical antenna - This is a vertically and horizontally polarized antenna the Linear loaded 1/4 wave length vertical radiator introduces very little loss for 80 or 160 meters
  [ Hits: 13797 | Votes: 18 | Rating: 6.71 ]
• A Potpourri of 160-Meter Verticals - A potpourri of 160-Meter vertical antennas and modeling issues, inverted-L, 3-element parasitic array, 1/4-wavelength monopole
  [ Hits: 3649 | Votes: 0 | Rating: 0 ]
• Vertical for 80 or 160 meters - KE4UYP project for a top fed 1/4 wave lenght linear loaded vertical for 80m or 160m
  [ Hits: 1721 | Votes: 1 | Rating: 1 ]
• Inverted L antenna for 160 and 80 meters - KN4LF article about a 1/4 wave fan inverted L antenna for 80 and 160 meters band
  [ Hits: 3561 | Votes: 2 | Rating: 5.5 ]

• 6 meter quarter wave antenna - 6 Meter 1/4 Wave Antenna by Mike Fedler N6TWW. A detailed article with pictures of construction details of this 50 Mhz antenna
  [ Hits: 1001 | Votes: 1 | Rating: 1 ]

• 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 ]

• 80m full size 1/4 wave GPA - A ground plane antenna for 80 meters band
  [ Hits: 1718 | Votes: 2 | Rating: 7 ]
• The 80M elevated wire vertical array - This 80M antenna is a pair of raised 1/4-wave verticals
  [ Hits: 1265 | Votes: 0 | Rating: 0 ]

• Antenna Loading Coil Calculation - The calculation refers to either a loaded 1/4 wave or a loaded dipole,
  [ Hits: 15457 | Votes: 126 | Rating: 4.69 ]

• 7dB VHF Collinear Antenna - This project is about a cheap way of building a colinear antenna for VHF 145MHz, and having about 10dB more gain than that little 1/4-wave magmount
  [ Hits: 4756 | Votes: 15 | Rating: 6.41 ]

• 20m Half-Wave End Fed - A Half wave antenna has a high impedance feed point. This can be matched using a 1/4 wave stub matching section and converts the 40m vertical into an L-shaped 20m J-Pole antenna. The 300 ohm feeder used for this purpose must be kept away from the ground.
  [ Hits: 1845 | Votes: 7 | Rating: 8 ]

• TX Four Square Antenna - A 220-ft tower that has five catenary lines, each about 500 feet long. Four of these lines, running NE, SE, SW, and NW support four 1/4-wavelength wire verticals used in a 160-meter four-square antenna.
  [ Hits: 787 | Votes: 0 | Rating: 0 ]

• Full Wave Loop Dimensions - This article contains the measurements for building a full wave loop using wire and length of 1/4 Wave Coax Matching Transformer
  [ Hits: 1088 | Votes: 3 | Rating: 7 ]

• Home Brew VHF UHF dual band antenna  ^pop - Contructing precedure and tune up of a dual band mobile antenna. This antenna is just a 1/4 wavelength resonator for both UHF and VHF band. It provides no GAIN as compared to other multi-section design.
  [ Hits: 36844 | Votes: 38 | Rating: 4.36 ]

• Build a 2 Meter Vertical Antenna - Homebrew a 2 meter 1/4 wave vertical antenna for the 146 mHz ham radio band
  [ Hits: 3061 | Votes: 9 | Rating: 6 ]

• VHF 5/8wave vertical antennas - By Guy, de ON6MU, At VHF, both the 1/4-wavelength monopole and the 5/8-wavelength monopole antennas are widely used.
  [ Hits: 1937 | Votes: 4 | Rating: 5.5 ]
• Quarter Wave 80 m vertical Antenna - Homebrew a 1/4 wave 80 meter vertical using aluminium tubing
  [ Hits: 2437 | Votes: 6 | Rating: 7 ]

• SardineCanAntenna - Seattle Wireless - Sardine Can Antenna. is a BiQuad or Bi circle - wire length each side (8 x 1/4 waves ) 31 mm
  [ Hits: 10236 | Votes: 13 | Rating: 4.61 ]

• Troubleshooting Traps - This article refers mainly to the old Cushcraft 1/4 wavelength AV series of antennas (12AVQ, 14AVQ etc) hence the references to radials. The R series (R5, R7 etc) are 1/2 wavelength antennas, and the radials are NOT 1/4 wavelength resonant.
  [ Hits: 2777 | Votes: 0 | Rating: 0 ]

• Interdigital bandpass filter designer - Fill out the form to design a bandpass filter as described in the January 1985 issue of Ham Radio Magazine. These filters are generally limited to frequencies above 200 MHZ because their size is slightly longer than 1/4 wavelength
  [ Hits: 1117 | Votes: 6 | Rating: 7.67 ]

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