math practice

Fractal Antennas Offer Benefits - Since they were first described by the French mathematician Benoit Mandelbrot in the mid-1970s, repeating geometric figures known as fractals have fascinated computer scientists, mathematicians and graphic artists.

KB0MGA.net Practice Exams - This site tries to learn which questions you know, and which ones you don't by keeping track of your answer by KB0MGA

eHam.net Ham Exams - Online ham radio practice exam by eHam, allow practice current exams but also old amateur radio exams based on old licence classes.

MP3 Morse Code Practice Files  ^updated - Stories that have been converted to Morse code .mp3 files.

HxPI Radio - First Steps Radio - First steps in science and technology. First steps radio. Color graphics and simple explanations of basic concepts in radio. An introduction to radio communication as a technical hobby. Resources for teaching, training, learning, self-study. Modern morse code. Morse code in the 21st Century. Morse code as a technical hobby. Morse training and practice material. Exercise files to download.

Good Operating Practices - Amateur radio good operating practices by KG9OM

Digital ATV in simple terms - This article was first published in CQ-TV issue 208. Author try to explain digital television in layman’s terms and without getting too involved in mathematics.

W1AW Code Practice Files - W1AW code practice transmissions for the dates and speeds indicated. The files are in MP3 format

LCWO Learn CW Online  ^updated - At LCWO you can learn Morse telegraphy (CW) online in your browser, use Koch Method, compare your results with others, speed practice and more

A Two-Way Morse Practice Set - The system consists of a pair of Morse practice oscillators connected by a piece of two-conductor cable. Pressing the key on one unit produces a sound in both units by Peter Parker VK3YE -

Code Practice Oscillator Museum - N4MW Code Practice Oscillator Museum

Keplerian Elements - Keplerian elements are the inputs to a standard mathematical model of spacecraft orbits.

HamStudy.org - Study for your ham radio license with hamstudy.org, a free suite of study tools with user contributed explanations for the questions. Learning flashcards and smart practice tests ensure that you see and learn the full pool while statistics enable you to track your progress.

RufzXP - RufzXP is an excellent free training software for improving code speed and CW practice, particularly (ultra) high speed memory copying of true amateur radio calls.

On Air CW Practice Program - This program is designed to send code practice lessons over the air. You can schedule sessions in advance, and the program will automatically begin at a scheduled time and ID automatically. Freeware

HamMorse for iPhone - Ham Morse allows you to practice morse code on your iPhone or iPod Touch. It is designed particularly for Ham radio operators and others who wish to achieve or maintain a high level of proficiency in this classic mode of communication.

PC CW Keyer - CWQSO allows you to practice sending and receiving CW in a real QSO!

Amateur Radio Exam Prep for iPhone - Amateur Radio License exams are composed of questions from a pool. Use this application to practice all possible questions prior to taking your exam

Elmer for iPhone - iPhone Software to practice taking your Ham Radio Exam

Morse Key for iPhone - A free simple touchscreen-based CW Morse Code straight key. Practice sending Morse Code on your iPhone.

Spectral Analysis of a CW keying pulse - Key clicks mathematical explanation by W9CF

Homemade CW key for Practice - Video of an homemade morse code key for practice