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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 Hindi translation of this page by Nathan Zed can be found
here.
A Portuguese translation of this page by Artur Weber and Adelina Domingos can be found
here.
A Ukrainian translation of this page by Sandi Wolfe 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 3Phase Calculator

This is a special purpose calculator which performs simple 3phase 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 PInetwork, Tnetwork, BTnetwork, Bnetwork
and Lnetwork 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 singlelayer
airspaced 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).
 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.
(My) Yahoo! Widgets
This is a collection of Widgets which were designed and made by me or to which I made a contribution.
 (My) Yahoo! Widgets
JavaScript Programs
 CRC32 Checksum Calculator

 CRCCCITT16 Checksum Calculator

 CRC16 Checksum Calculator

PostScript Programs
 NMEA to RS232 Interface Board

 NetCalc Impedance Chart (PDF)

 Resonant Circuit Nomogram (110MHz) (PDF)

 Resonant Circuit Nomogram (100kHz10MHz) (PDF)
Sunday, August 4, 2019.