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ECLM Chapters ECLM Homepage Introduction Operating Practices Rules and Regulations Electrical Principles Components and Building Blocks Electronic Circuits Radio Signals and Measurements Radio Modes and Equipment Antenna and Feed Lines Topics in Radio Propagation Safety   ARRL Products: Operating (More) The ARRL Repeater Directory (Pocket-sized) -- 2009/2010 Edition. Find Repeaters FASTER! ARRL's HF Digital Handbook -- Join the Digital Race! 4th Edition. * The ARRL Field Day Handbook w/ BONUS 2010 Field Day Pin -- Shipping April 1! -- A Collection of Tools and Resources for Field Day FUN! Radio Amateur Callbook CD-ROM (2010) -- Now Shipping! -- Winter Edition! More than 1,600,000 licensed radio amateurs! Includes International and North American listings and Amateur Radio Prefix Maps. The ARRL Operating Manual -- Everything for the active ham radio operator! Explore new activities, learn new skills, find new references and more.

Chapter 4 – Electrical Principles &
Chapter 5 – Components and Building Blocks

Chapters 4 and 5 take you beyond the introduction to electronics that you mastered to pass your General Class exam. This is the most detailed part of the exam, so take your time with your studies and be sure you understand the material. Background material is provided to support the topic in the license study guide.

Electronics Math and Basic Concepts

• Math supplement  - online tutorials and articles on a variety of math topics common in radio
• ARRL Technical Information Service (TIS) - numerous Web resources and magazine articles on technical topics of interest to all hams
• The ARRL Handbook - the oldest and best radio handbook around
• Understanding Basic Electronics - introduction to the electronics of radio

 Transistors and Diodes

• Diodes - all about the diode
• Bipolar Junction Transistor (BJT) - all about PNP and NPN transistors
• Field-Effect Transistor - this article links to detailed treatments of all of the variations of the FET

Integrated Circuits

• Digital logic - this is a good overview of digital electronic circuits

Optoelectronics

• Optoelectronics - an article that discusses devices that make use of both photoconductivity and the photoelectric effect