New 10th edition © 2012, updated for preparation for the new question pool effective July 1, 2012.
3rd edition © 2012, updated for preparation for the new question pool effective July 1, 2012.
Randy Herber, W9HE offers the following study aids:
- W9HE Notes
- W9HE Amplifiers
- W9HE Components
- W9HE Signals
- 2012-2016 Extra Class Diagrams
- W9HE Impedance-Admittance Smith Chart
- W9HE LogTable
- W9HE LogTrig
- W9HE LogTrig-no Smith
- W9DUP Azimuthal Equidistant Map centered on W9DUP's repeater
- W9DUP Azimuthal Equidistant Map centered on the antipode of W9DUP's repeater
- W9DUP Whetstone Bridge Emulator
- W9HE ReadMe for above files and contact information
This Web resource is designed to provide additional information for you as you study for your Extra Class Amateur Radio license.
A free mentored license exam study program offered by Fred Benson NC4FB that covers Technician/General/Extra is available for candidates who need assistance in preparing for license exams. Candidates need to have an email address and Internet access.
Interested candidates can enroll at
Need to review some math to prepare for your Extra exam? We've identified some tutorials that may prove helpfu
Additional math tutorials from Paul's Online Math notes.
Dave Casler, KE0OG provides quite a few helpful videos as a complement to the ARRL study manual.
Jack Tiley's, AD7FO, often requested study guide offers material arranged in the original numerical order of the VEC question pool. You'll find concise explanations, well-thought out graphics and step-by-step calculations for the mathematically based questions.