low freq

low freq

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• 20 meter short loaded vertical antennas - N4SPP
  
  Loading is a way to lower the resonant frequency of an antenna radiator This technique ...
  [ Hits: 233 | Votes: 1 | Rating: 9 ]

• Choking balun for 160-30 meter band - VK6YSF
  
  Choking balun for lower HF and MF bands 1 8MHz 10MHz Requiring a choking balun ...
  [ Hits: 197 | Votes: 3 | Rating: 6 ]

• What is Horn Antenna - frambos
  
  Horn Antenna The energy of the beam when slowly transform into radiation the losses are ...
  [ Hits: 74 | Votes: 0 | Rating: 0 ]

• The W5JGV Loop Antenna - W5JGV
  
  A Shielded Low Frequency Loop Antenna allows Simultaneous Transmission and Reception at the Same Site ...
  [ Hits: 257 | Votes: 0 | Rating: 0 ]

• Balcony Mounted Buddistick Antenna by KP4MD - KP4MD
  
  The antenna handles 250 watts and covers 40 through 10 meters with an optional add ...
  [ Hits: 282 | Votes: 3 | Rating: 10 ]

• T2FD Antenna - Terminated and twisted folded dipole - OH1AYR
  
  T2FD is a 600 900 ohms folded dipole terminated with resistor Feed impedance is coupled ...
  [ Hits: 494 | Votes: 0 | Rating: 0 ]

• Long Wire Antenna for portable operations - VK6YSF  ^updated
  
  With the view to establish a quick and easy multi band antenna deployment for portable ...
  [ Hits: 806 | Votes: 14 | Rating: 8.36 ]

• XW4DX LAOS DXPedition - XW4DX
  
  XW4DX DXpedition to Laos 16 to 27 November 2023 We will be operating on all ...
  [ Hits: 12 | Votes: 0 | Rating: 0 ]

• HG7AN Antenna Analyzer - HG7AN
  
  Antenna Analyzer plus 500 is a multifunctional measuring instrument very useful for amateur radio activity ...
  [ Hits: 266 | Votes: 1 | Rating: 10 ]

• Recognition of CW signs at different listening levels and frequencies - PubMed
  
  The recognition of telegraphy masked by noise at 40 and 80 signs min telegraphy speed ...
  [ Hits: 81 | Votes: 1 | Rating: 7 ]

• HF communication prediction tools - BOM
  
  Online HF Communication prediction system provided by the Australian Governament Buerau of Metereology allow to ...
  [ Hits: 169 | Votes: 0 | Rating: 0 ]

• Yaesu FT-950 CAT Manual - Yaesu
  
  The CAT Computer Aided Transceiver System in the FT 950 transceiver provides control of frequency ...
  [ Hits: 60 | Votes: 0 | Rating: 0 ]

• FT991 MARS Mod - FT991
  
  This modification will expand the tx frequency range of the Yaesu FT 991 from allowing ...
  [ Hits: 933 | Votes: 5 | Rating: 3 ]

• ICOM IC-R75 Review by N9EWO - N9EWO
  
  Icom IC R75 tabletop HF communications receiver came onto the market back in 1999 and ...
  [ Hits: 44 | Votes: 0 | Rating: 0 ]

• WSQCall A Weak Signal QSO mode for LF/MF - zl1bpu
  
  Amateur Radio enthusiasts who are interested in the LF and MF bands may be familiar ...
  [ Hits: 187 | Votes: 0 | Rating: 0 ]

• A switched Capacitor Audio Filter - AA8C
  
  Here is a rather nice audio filter for use with Ham Radio gear It features ...
  [ Hits: 73 | Votes: 0 | Rating: 0 ]

• Bandpass Filter Calculator - learningaboutelectronics
  
  Passive Bandpass Filter online calculator and filter formulas Active Inverting Op Amp Bandpass Filters Active ...
  [ Hits: 171 | Votes: 3 | Rating: 5.33 ]

• A 2 meter band-pass cavity using surplus Heliax - ka7oei
  
  Cavity is often required at a busy site to not only prevent its receiver from ...
  [ Hits: 131 | Votes: 2 | Rating: 3 ]

• ADF4351 Signal Generator - CT2GQV
  
  Just a simple signal generator based on ADF4351 module from fleebay allows you to generate ...
  [ Hits: 149 | Votes: 2 | Rating: 10 ]

• 2m to 70cm Transverter Circuit - VK4ADC
  
  A 70cm 432 MHz Transverter Project transverter circuit is an electronic device that converts a ...
  [ Hits: 82 | Votes: 0 | Rating: 0 ]

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