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• 40m loaded dipole - IZ0GIF
  
  This is an short dipole for 7 MHz Total length of this dipole is just ...
  [ Hits: 196 | Votes: 4 | Rating: 8.75 ]

• 70 cm Helix Antenna - VE2EK
  
  Helix antenna 432 435 MHz 14 turns This 50 ohm impedance antenna allows when fed ...
  [ Hits: 256 | Votes: 2 | Rating: 10 ]

• Patented RF choke test - PA3FWM
  
  A reproduction test of a a binocular ferrite core and winds a total of 7 ...
  [ Hits: 105 | Votes: 0 | Rating: 0 ]
• Do not wind chokes on red toroids! - iz2uuf
  
  I happened to stumble across some antenna projects showing common mode chokes 1 1 baluns ...
  [ Hits: 188 | Votes: 0 | Rating: 0 ]
• How to find out if your choke works - VA3KOT
  
  How many times have you heard the advice to coil a few turns of coax ...
  [ Hits: 211 | Votes: 1 | Rating: 9 ]

• RX Loop Antenna for 80 and 160 Meters - G1EXG
  
  Four or Five turn one meter loop antenna for 80 and 160 meter band This ...
  [ Hits: 248 | Votes: 1 | Rating: 1 ]

• HF Receive Antenna - K0EMT
  
  This page describes a couple of parts box medicine bottle antennas that you can build ...
  [ Hits: 192 | Votes: 2 | Rating: 3 ]

• Active 3-30 MHz Hula-Loop Antenna for Shortwave - Charles Wenzel
  
  This active antenna for the shortwave band provides surprising performance even indoors As the name ...
  [ Hits: 160 | Votes: 1 | Rating: 10 ]
• Dual-Band X-Frame Shortwave RX Loop Antenna - KD6RF
  
  A dual band X frame wire antenna made using 4 turns for response down to ...
  [ Hits: 148 | Votes: 1 | Rating: 10 ]

• Notable Patents on Antenna Design - aktuellum
  
  Patents of most popular antenna models including Zeppelin Antenna Beverage Antenna Franklin Antenna Yagi Uda ...
  [ Hits: 287 | Votes: 0 | Rating: 0 ]

• FreeDV - Digital Voice for HF bands - K9XN
  
  FreeDV uses an audio codec as a software based modem to decode and encode the ...
  [ Hits: 92 | Votes: 0 | Rating: 0 ]

• Amateur Service Spectrum Requirements at 7 MHz - IARU
  
  An information paper by the International Amateur Radio Union The amateur service seeks the return ...
  [ Hits: 94 | Votes: 5 | Rating: 10 ]

• Amidon ferrite toroids calculator - coil32
  
  Select the toroid by material type and dimension of the toroid the desired inductance and ...
  [ Hits: 394 | Votes: 3 | Rating: 6 ]
• RF Inductor Calculator - vk3cpu
  
  This air core solenoid style RF inductor calculator calculates the inductance wire size number of ...
  [ Hits: 101 | Votes: 3 | Rating: 7 ]

• QRZ.sh - DK1MI
  
  This script queries the QRZ com callsign database and returns the result to the command ...
  [ Hits: 60 | Votes: 0 | Rating: 0 ]

• VSWR Calculator - RFTOOLS
  
  This calculator converts between VSWR and Return Loss Reflection Coefficient Mismatch Loss and Reflected Power ...
  [ Hits: 102 | Votes: 2 | Rating: 7 ]

• Transmission Line Details - AC6LA
  
  This utility program shows the impedance and reflection coefficient parameters SWR reflection coefficient magnitude Rho ...
  [ Hits: 128 | Votes: 0 | Rating: 0 ]

• Online Toroid Multi Calculator - toroids.info
  
  This website provide online calculator for several values about a large variety of toroids Freq ...
  [ Hits: 213 | Votes: 3 | Rating: 5 ]

• Common-mode chokes Measurements - IN3OTD
  
  Common mode chokes are useful solutions for RFI reduction Winding a few turns of coaxial ...
  [ Hits: 156 | Votes: 1 | Rating: 8 ]

• Blocking Dynamic Range in Receivers - SM5BSZ
  
  An explanation of the different procedures and definitions that are commonly used for blocking dynamic ...
  [ Hits: 175 | Votes: 0 | Rating: 0 ]

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