RF Design and Amateur Radio Related Programs

These programs are distributed in the hope that they will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Most are made available under the terms of the GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version, but see the License conditions for each individual program.

Almost all of these programs are in the form of Yahoo! Widgets which require installation of the Yahoo! (Konfabulator) Widget Engine.
Yahoo! Widgets are coded in XML and javascript.

They are packaged as zipped Widgets (with extension .widget) inside a zipped folder. The code can be examined by unzipping the .widget files.

A Dutch translation of this page by Johanne Teerink can be found here.

A Portuguese translation of this page by Artur Weber and Adelina Domingos can be found here.

A Sindhi translation of this page by Muntazir Mehdi can be found here.

A Ukrainian translation of this page by Sandi Wolfe can be found here.

An Urdu translation of this page by Samuel Badree of Coupontoaster can be found here.

RF Design Widgets

NetCalc - an RF Impedance Calculator (Downloads: 23,979): NetCalc is broadly based on the program NETCALC by Ian White. NETCALC was described by Ian as a simple impedance calculator for working out Radio Frequency network design ideas.

This Yahoo! Widget can be used on Windows and on older version of macOS (before 10.11 El Capitan).

You may also use the new web version or download the files for local use in your browser.
TLC - Transmission Line Calculator: This is a special purpose calculator which performs transmission line calculations. Various geometries are possible with the hot and cold conductors having elliptic or rectangular shapes. The Widget calculates the line characteristics and displays the voltage field.

Amateur Radio Related Widgets

AC 3-Phase Calculator: This is a special purpose calculator which performs simple 3-phase alternating current calculations. Given three of the four quantities voltage, current, power factor and power, the Widget calculates the value of the fourth. Two formulae are used, one for line voltages and currents, the other for phase voltages and currents.
Attenuator (Downloads: 8,525): Attenuator is a special purpose calculator for the design of passive resistive attenuators and impedance matching circuits.

Version 2.1

The Widget can assist in the design of PI-network, T-network, BT-network, B-network and L-network attenuators and impedance matching circuits. It can perform single calculations and (in symmetric cases) generate tables for later use.
Coil Inductance: This is a special purpose calculator which calculates the properties of a single-layer air-spaced coil. Given three parameters, the Widget calculates the value of a fourth.
LCR Resonance Calculator: Version 1.1

This is a special purpose calculator for the analysis of LCR resonant circuits.
Morse Key: This is a Morse code practice program. The sending speed is user settable (Farnsworth method) between 5 and 20 wpm. Text files and texts can be dragged onto the main window and are sent after a two second delay. There are ten user settable "standard" texts which are sent by pressing a hotkey. The keyboard can be used to send Morse code. The Widget displays the characters (but not the Morse patterns) as they are sent.
Ohm's Law Calculator: This is a special purpose calculator which performs simple calculations using Ohm's Law. Given any two of the four quantities - voltage, current, resistance or power - the Widget calculates the values of the other two.
Resistors: The Resistors Widget is a special purpose calculator which can be used to decode the colored bands on resistors (and some small capacitors).
Steampunk Resistors - with Dean Beedell: The Steampunk Resistors Widget is a special purpose calculator which can be used to decode the colored bands on resistors (and some small capacitors).
Tx Line Calculator: This is a special purpose calculator which performs simple transmission line calculations. Given three line parameters, the Widget calculates the value of a fourth. Two formulae are used, one for coaxial cable, the other for parallel line.