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Antennas : 20M

• Speaker Wire Delta Loop Antenna for 20M - The antenna I built was inspired by a portable delta loop designed by Doug DeMaw, W1FB. Given that I constrained myself to a 50-foot roll of speak wire, I scaled my antenna for the 20M band. Using the formula, 1005 divided by the frequency in megahertz, I calculated a total length of 71 feet (21.6 meters) for the center of the 20M band.
  [ Hits: 127 | Votes: 0 | Rating: 0 ]

• Full Wave Delta Loop at Low Height - Article using a full wave delta loop antenna at low height, feeding methods, performance reports on 1984 QST article by W1FB and W1SE
  [ Hits: 1542 | Votes: 4 | Rating: 5.75 ]

• The Classic Beverage Antenna Revisited - This is a QST Article published in January 1982 by W1FB D. Demaw and HH Beverage and is a complete review of the original article published in 1922, which updates and reivew the beverage antenna theory and developlment, explaining the antenna design of transformers and gives accurate reports on antenna general performance.
  [ Hits: 563 | Votes: 1 | Rating: 6 ]

• A diode-switched band-pass filter - High speed silicn diodes work well as RF switches. This article describes how to use diodes for selecting two or more filters ARRL QST article by W1FB
  [ Hits: 2305 | Votes: 3 | Rating: 4.67 ]

• Tuna Tin - A resurrection of some homebrew projects from our vintage years and the NorCal-sponsored project series in tribute to Doug DeMaw, W1FB
  [ Hits: 1275 | Votes: 0 | Rating: 0 ]
• Tuna Tin 2 - The Tuna Tin 2 is a simple transmitter originally designed by the legendary author and experimenter Doug DeMaw, W1FB. The TT2 was first published in the May 1976 issue of QST.
  [ Hits: 800 | Votes: 0 | Rating: 0 ]

• QRP Transceiver for 3.5 Mhz - A QRP transceiver for 80 meters band by W1FB
  [ Hits: 1502 | Votes: 1 | Rating: 10 ]