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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: CD-ROMs (More) TravelPlus CD-ROM -- Locate repeaters along your travel route. Detailed maps and current repeater data. PR-101 Course on CD-ROM -- Now Shipping! -- Designed to give hams a quick course in public relations activities. ARRL General Class Course For Ham Radio Licensing -- Now Shipping! -- The Fastest Way to General Class License Success! CD-ROM Included! The ARRL Digital Technology for Emergency Communications Course -- Now Shipping! -- CD-ROM. Learn all the ways to use digital technology as an emergency communications tool! The ARRL Software Library for Hams 3.0 -- Now Shipping! -- CD-ROM, Version 3.0. Quick access to utilities, applications and information.

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