Ham Radio Prep analyzed thousands of practice test results and found the top 10 questions that prospective hams have the most difficulty with. Paying attention to these could make the difference between passing or failing. I'm particularly struggling with antenna calculations and RF exposure limits. The wavelength formula (Wavelength x Frequency = 300) keeps tripping me up.

• How do you quickly calculate wavelength from frequency during the exam?
• What's the easiest way to remember RF exposure power density limits?
• Any memory tricks for the different antenna types and their characteristics?

Write "Wavelength x Frequency = 300" on your scratch paper immediately. For example, 2 meters times 146 MHz = 292, which is close enough to 300. This formula will help you eliminate wrong answers quickly.

For RF safety, focus on the key power levels: 100W PEP for most VHF/UHF, and remember that distance is your friend - doubling distance quarters the power density. The math questions always use round numbers to make calculations easier.

Break down information into the 10 sub-pools of questions, and flashcards are a great way to memorize. I made my own using Quizlet for the antenna types - dipole, Yagi, vertical, etc. Just making the cards helps retention.