HamStudy.org
Signal Stuff
Free flashcard and practice-exam site covering the current FCC question pools for Technician, General and Extra, plus Canadian and other national exams. Spaced-repetition tracking, per-question explanations, and exams generated the same way volunteer examiners build them.
More resources on Amateur (Ham) Radio
Ham Radio Workbench Podcast
Biweekly technical roundtable hosted by George Zafiropoulos, KJ6VU, with co-hosts and guests covering test equipment, microcontroller and SDR projects, antenna measurement, QRP transceiver design and kit building. Show notes link the parts, tools and repositories discussed.
Ham Radio Crash Course
Covers the hands-on gap no book or question pool fills: what a station physically looks like and what happens when you build one. Josh Nass, KI6NAZ, films antenna builds, radio teardowns, portable and field operating, digital-mode setup and equipment comparisons, generally measuring results rather than asserting them. Large back catalogue organised into playlists for newcomers, HF operating and shack construction.
WSJT-X User Guide
Digital modes are the dominant mode of modern operating and the part of the hobby most poorly served by secondhand tutorials. The guide explains the signalling and decoding design, not just menu clicks. Official documentation for the weak-signal software suite written by Nobel laureate Joe Taylor, K1JT. Covers installation, station and rig configuration, audio interfacing, and the protocol design plus operating procedure for FT8, FT4, WSPR, Q65, MSK144 and JT65.
The ARRL Antenna Book for Radio Communications, 25th Edition
Antennas are where amateur practice actually lives and where the worst misinformation circulates; this is the one source that settles arguments with modelled and measured data. Reference on antenna and transmission-line engineering: dipoles, verticals, Yagis, loops and wire arrays, feed lines, matching networks, baluns, NEC modelling, ground systems, and HF through microwave propagation. Includes design tables, measured data and decades of accumulated ARRL antenna work.
The ARRL Handbook for Radio Communications, 101st Edition
The structural anchor for the topic: it teaches how radios work, not how to pass a test. The national association's reference volume on radio electronics: components, analog and digital circuit theory, RF techniques, modulation, receivers and transmitters, power supplies, propagation, safety and test equipment, with construction projects. Revised roughly annually and used well beyond the licence syllabus.
47 CFR Part 97 — Amateur Radio Service
Every operating question terminates here. The FCC regulations governing the US amateur service, in the official continuously updated electronic Code of Federal Regulations: licensing, control operator duties, prohibited transmissions, band and power limits, emission standards, repeaters, satellites, emergency operation and the volunteer examiner system.