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 Amateur Radio Theory



Download Following Useful Educational Documents & Software: 


Radio Box is a suite of 14 programs-in-one for the Radio Amateur or for anyone studying Amateur Radio. The programs range from beginner to advanced. An extensive Windows Help File is included which has tutorials on what each program does. In most cases examples are given. Radio Box will run on Windows 95/98/NT (Size 1mb)


CW Player Version 2.3 is free software for learning and training the Morse code. It features many possibilities : playing live texts, text files, the alphabet, the main HAM abbreviations, the Q codes. It plays random series of characters. Typical lessons are proposed that you may modify to your purpose. CW Player requires Win95/98/ME and a sound card as minimum configuration.


WaveGen - will read a text file and convert into a Morse Code wave file which can be played on your computer. I have tested this program and it is brilliant. I created a text file (plain text) using notepad. I typed in the text I wanted converted to CW and saved the file as 'test.txt'. I then converted test.txt to a wave file with the following commands from the DOS prompt. wavegen test.txt /10,10,730/ when I pressed enter test.txt was converted to a CW wave file with an average speed of 10 WPM, a character speed of 10 WPM, at a tone of 730 Hz. You just have leave DOS for windows and double click on test.wav and windows will play it. I prefer using WinAmp as my wave player you can get WinAmp for free from www.winamp.com. Note: in the command line given above test.txt is in the same directory (folder) as wavgen. All other speeds are supported. Download the file wavgen.zip - You will need WinZip to unzip it.



The ADVANCED AOCP(A) Theory Exam Syllabus (PDF format)

The STANDARD AOCP(S) Theory Exam Syllabus (PDF format)
Amateur Radio Practical Assessment guide and check sheet - Public Domain
A set of 14 physics experiments to do on the computer. Standing waves, Light, Newton's laws - and - 11 more experiments. (Win95/98/ME) (Size 2.5mb)
The resistor cube problem - solved. Many radio and electronics learners have been confronted with a cube made of resistors - one resistor for each side of the cube. The object is to find the total resistance. David VK4TDR has written a solution using simultaneous equations and also a very eligant solution using Ohms law and some logic. (PDF file)
Resistor Colour Code Calculator. This is the best resistor colour code training program we have seen. Recommended.
Another Resistor Colour Code Calculator. This small program for MS Windows will convert colours to the resistor value and vice versa. Use this program to help learn or test yourself on the resistor colour code.
CRO is a shareware program that illustrates the use of an Oscilloscope on your PC A good teaching program. CRO requires the Visual Basic 3 runtime library Vbrun300.dll On most PC's you will already have this file in your windows directory - if not you can obtain it off many PC magazine cover disks or off the internet - but chances are it is already on your machine.
View or download a slide show of the structure of the atom. This slide show goes much further than what you need to know in the course - however it may broaden your knowledge a little.
A brief description of the Quantum Model of the atom. (PDF)
View or download an animation of Faradays Law of Induction (Animated GIF)
These two animations of a water system to demonstrate how a capacitor can smooth a pulsating voltage A diaphragm pump delivers pulses of water and the mechanical capacitor (a sealed chamber) stores water to provide a smooth flow at the outlet at all times. The mechanical capacitor provides water to the outlet during the NO PUMP PERIOD - just like a capacitor delivers output during the NO VOLTAGE PULSE PERIOD View or download these animations (Animated GIF).

Download1   Download2

How fast does an electric current really travel? This article in PDF format shows how to calculate the velocity of an electric current with a worked example. (Revised December 1999)
Common-Emitter Amplifiers - optional supplementary reading. This Common-Emitter Amplifier supplement goes a little further in explaining the operation of a BJT - CE Amplifier - In particular you will learn a little more about the fundamentals of Transistor Bias. Why does a CE amplifier produce a 180 degree phase change between input and output? - this is discussed with diagrams.
3 Phase power - An introduction to 3 Phase power (PDF format)
The XYZ of oscilloscopes - An excellent introductory text (PDF format)
Design of a very simple FM transmitter. This should not be considered course material as it does go a little further is some places than is needed. However Francis does cover some necessary theory required for Amateur Radio and he develops an very interesting low power simple FM transmitter for the Broadcast Band. A very good read - in PDF format. 

Some excellent simple circuits are given. It would be quiet easy to build one of his designs as a project. The PDF is just over 1 Megabyte and an excellent read though in places much deeper than that required for Amateur Exams. The thesis is about 80 pages with 10 pages of appendices. The Author has placed this material in the public domain to the best of my knowledge.

How to test audio transformers - Brian Clarke VK2GCE describes the procedure in testing an audio transformer.
Sailing the Ionosphere - Fred Backer VK2FJB discusses the ionosphere. How it affects radio propagation and how it can be used to the benefit of radio amateurs.
A short introduction to logic gates - covering more than is required for the AOCP(A) - Just make sure you can identify the symbol of the AND - OR - NAND amd INVERT and you will be okay. This is a GIF file which may be viewed online or download and viewed or printed offline.
Decibels without a calculator by - Jerry L. Bartachek KDěCA A very good article by Jerry - posted here with his permission - read it!. (PDF format)
An Introduction to Packet Radio. Larry Kenny WB9LOZ. An excellent series of articles in electronic book format. Explains Packet Radio communications for the beginner.
Who invented Radio? A interesting details on Tesla - The Eccentric Genius of Electricity 
Story - The Elusive Sunspot Cycle A controversial look at radio propagation from the view of Sunspots and the so called Sunspot Cycle. (Revised December 1999)
Emission Characteristics of Radio Transmissions - An unmodified ACA document (PDF format)
Electromagnetic Radiation Limit (DRAFT) Compliance Distance Calculator. The program will perform distance calculations at any power level and antenna gain - in the range 10MHz to 300 GHz and has provision for the emission duty cycle.
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