Extra Class Practice Exam (Stacked Bars with Toggle Groups) Extra Class Practice Exam Get ready for the FCC Extra Class license exam with this free online ham radio practice test. Our interactive exam tool uses the official FCC Element 4 Question Pool (valid July 2024–2028) and automatically tracks your performance. See your score history, review stacked bar charts of correct vs wrong answers by subelement, and drill down into specific group stats with a single click. This is the first practice run of the free online ham radio practice exams. I fully expect it to be a bit buggy. Please leave any suggestions or bug descriptions in the comments. Exam scores and statistics will be stored in the URL when you click 'New exam/Save Scores' after you complete an exam. To get back to your scores, you should be able to use the histsory feature in your browser, or if you'd rather, copy the link somewhere to put into a browser later. Important Note: To save your s...
This week I spent some time tightening up the workflow for comparing F2 ionospheric data across different POTA outings. It turns out documentation really does matter. By writing things down, I’ve not only made the manual process clearer but also pushed the automated flow forward. With GPT-5’s help on documenting proton and electron flux plots, and my own notes on numeric F2 graphs along QSO paths, the project is steadily becoming easier to repeat and share. I put in a little bit of time working on being able to easily compare F2 data for different POTA outings this morning. It turns out documentation really does matter, so I've been focusing a bit more on it. I have a number of tools that allowed me to pull in F2 data quickly. This week I've been trying to spend time pulling them into an automated flow. As I've implemented this flow, I've discovered that I haven't taken the time to document the tools I've already built. I asked GPT5 to document the solar prot...