calculate

Magnetic loop for 160 meters - Pictures and calculated values for this home made magnetic loop antenna for the 160 meters band by HB9MTN

Quadrifilar helicoidal calculator - Calculate design for a quadrifilar helicoidal antenna

Loop antenna resonant frequency calculator - Calculates resonant frequency of a loop antenna, correcting for distributed capacitance.

Dipole Calculator in JavaScript - Input the desired resonant frequency and it will calculate lenght in inches feet and meters

A Simple 7 element Yagi calculator  ^{updated  pop} - A JavaScript to calculate the dimensions for a seven element Yagi-Uda Antenna

W4HN Antenna Calculator - Calculate your dipole, 3 element yagi and a simple dipole

Coax Dipole Calculator - An efficient program to calculate dimensions of coax dipoles, or bazooka antennas considering velocity length of different coax cables. Express dimensions in feet/inch and meters/cm. Freeware by VE3SQB

K7MEM - Inverted V Antenna Design - Inverted V antennas is a dipole with the center raised on a mast and the endpoints near ground. Calculate dimensions online.

ERP Estimator - Calculate online, ERP in dB and dBi given PWR Frequency Coax lenght and type and antenna type

Design a J-pole Antenna - Enter the operating frequency in MHz to calculate the dimensions for your J-pole.

Yagi antenna Q Factor - How you can calculate antenna Q factor for use in antenna quality evaluation instead of use of VSWR bandwidth.

DXCC List with your beam headings - You can have your persolal DXCC country list with correct beam heading calculated on you grid square location by ok2pbq

QTH Locator map - Click on the map and the QTH locator will be calculated

D-Star Call Calculator - Calculate how to set call signs

PreMuLoc for windows - This program combines the formerly know programs PreFind and MU-Locator into one but with many improvements to find the location of any prefix, country or Maidenhead locator! Display and find locators on any map and calculate the distance and direction between two locators.

QTH Locator - QTH Locator is free Windows program to calculate distances and angles between 2 stations, with a data base to handle and store position data (even usable as a simple logbook) and a lot of graphic stuff to display geographic positions. It is capable to display self-made maps or UIVIEW maps also. by dg4mcb

W2IOL GCGC Distance/Bearing - Freeware dos and linux command line executables to calculate grid great circle/geodesic distance, azimuth/bearing and MUF calculator by W2IOL

FA Palm - Grid Square - Grid Square for Palm OS calculates the Maidenhead Grid Square for a given latitude and longitude.

GPSLocator - Use a pocketpc with serial or bluetooth GPS to calculatethe grid locator y IW2BSQ

BeamFinder - BeamFinder is a software tool designed to conduct analyses for radio amateurs interested in radio propagation studies. It provides a large 2500 x 1800 pixel screen map of the world which displays calculated results from sophisticated models, dx data and other sources of information

iLocator for iPhone - A small application for Apple iPhone that calculate grid locator from gps, wifi or gsm cells by IW2BSQ

Coil Inductance Calculator - Calculate the inductance of a single-layer, air-core coil.

Loss Calculator - Calculate power loss depending on coax cable you use

Accurate Inductance Calculator - This page allows you to calculate in the most accurate way high-Q inductor coils.

Inductor Design Software - RF toroid - A free too designed to assist in the selection of iron and alloy powder cores. RF toroid calculate the location of the Self resonate frequencies for series and shunt inductors.