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Antennas : 160M
  • Inverted L- Antenna for the TOP Band - An schema drawing and formula to calculate size of an Inverted L antenna for the 160 meters band, 1.84 MHz.
    [ Hits: 699 | Votes: 8 | Rating: 6 ]
Antennas : Antenna Calculators
  • Christman Phasing Calculator - Calculate vertical array pahse antenna accorting to the Christman technique
    [ Hits: 622 | Votes: 1 | Rating: 3 ]
  • Calculate safety distance from your antenna - ICNIRP is a calculator software that allows you to determ safety distances for many know amateur radio antennas with respect to ICNIRP limits developed by DL9KCE
    [ Hits: 930 | Votes: 2 | Rating: 4 ]
  • Full Wave Loop Antenna Calculator - Use this online calculator to determine the length of a full-wave loop antenna from the frequency. Both metric and English units of measurement are supported. Quarter-wave matching section lengths are also calculated.
    [ Hits: 929 | Votes: 5 | Rating: 8.2 ]
  • J-Pole Antenna Plan and Calculator  updated - An online J-Pole antenna calculator that need just to input the frequency and calculates in inch size of each element
    [ Hits: 968 | Votes: 25 | Rating: 4.69 ]
  • Calculate Antenna Lenght in feet, inches and meters - Inches and meters Javascript Wavelength Calculator allow to input a frequency in MHz and calculate wavelenght in several units considering also fractions of wavelenght and the velocity factor. Includes an usefull inch to meter converter
    [ Hits: 502 | Votes: 3 | Rating: 4.67 ]
  • The Antenna Torque Calculator - This unique online tool helps Ham Radio operators to choose the right rotator for medium and large HF antenna systems. The algorithm implemented in this calculator is the result of 40 years of experience in the HF Antenna sector. Given the Wind Speed, the total antenna square area, and the boom length, it will return the calculated torque value.
    [ Hits: 178 | Votes: 1 | Rating: 1 ]
  • Magnetic Loop Antenna Calculator Spreadsheet - Excel spreadsheet that help calculating dimensions of a high efficiency magnetic loop antenna for HF bands. Giving in input the loop perimeter, loop diameter and loop conductor will calculate electric characteristics, bandwidth, and efficiency
    [ Hits: 1877 | Votes: 4 | Rating: 9.25 ]
  • Quad Antenna On-line Calculator - Cubical Quad Antenna On-line Calculator helps on defining the size of each element and spreader. Simply give the resonating frequency and it will calculate size of each element.
    [ Hits: 289 | Votes: 1 | Rating: 5 ]
Antennas : Feed Lines Antennas : Installation
  • Calculating Your Radio Horizon - The range and coverage of your VHF transceiver will be limited to your radio horizon. How to calculate the visual horizon and how to determine the Radio Horizon
    [ Hits: 755 | Votes: 5 | Rating: 5.4 ]
Antennas : Theory
  • Designing Vertical Aerials - If you want to design vertical antennas you can find all theory and formulas used to model a vertical aerial calculating capacitance, reactance, building the inductor and calculating resistances. Includes an excel spreadsheet to calculate efficiency.
    [ Hits: 576 | Votes: 0 | Rating: 0 ]
Operating Modes : EME Software : Antenna analysis
  • Balun_cmr Calculate common-mode impedance - This EXCEL Program Worksheet calculates the common-mode impedance of a 1:1 Guanella (current) balun which is placed at the feed point of a balanced antenna system fed via coax.
    [ Hits: 400 | Votes: 1 | Rating: 10 ]
Software : Circuit Design
  • Coil Inductance and Q Calculator - Calculates inductance and Q for single-layer coils made of solid or Litz wire. Uses U.S. or metric dimensions. Can automatically maximize Q. Includes accuracy data. Runs in Windows.
    [ Hits: 255 | Votes: 0 | Rating: 0 ]
  • Resistor Color Code Calculator - Calculate the value of an unknown resistor with this free program for windows
    [ Hits: 760 | Votes: 19 | Rating: 5.25 ]
  • mini Ring-Core-Calculator - Calculate windings on ferrite cores - The program can be used to calculate inductors (coils) and their number of turns on ferrite cores, ferrite shells and air coils. These can be used for baluns, Ununs, bandpass filters, low pass filters, resonant circuits, and more. The technical specifications of the cores are already integrated in the program. Application is free and runs on Windows 32 bit versions only. To make it run on Windows 10 64 bit need to be unzipped in a single folder.
    [ Hits: 390 | Votes: 1 | Rating: 1 ]
  • FT CALC 1.3 - Ferrite Toroidal Core HF Calculator - This EXCEL Program Worksheet calculates the safe operating conditons for a toroidal transformer operating between 1 and 50 MHz. Manufacturer data for complex permeability, magnetic dimensions, and saturation flux density must be available. Some core types which are commonly used in amateur transmission are included. The program produces limiting winding voltages for linear operation and temperature rise over the range of frequencies and power specified.
    [ Hits: 283 | Votes: 1 | Rating: 2 ]
Technical Reference : Dummy Loads
  • Homebrew dummy load - A simple 50 ohm dummy load to test transmitters. includes a simple RF diode detector to measure the peak voltage, and calculate the power
    [ Hits: 962 | Votes: 0 | Rating: 0 ]
Technical Reference : RF Safety
  • Magnetic Loop RF Safety - Notes on the intensity of RF Field calculated on magnetic loop antennas. The magnetic field intensity of a mag loop is considerably higher than the E field probably due to the inductive portion of the resonant circuit creating the radiation (magnetic) in the near field
    [ Hits: 855 | Votes: 3 | Rating: 4 ]

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