Below are a few of the most fundamental concepts that all amateur radio operators should have seared into their brains. Familiarity with these concepts is required to earn the Technician Class license, and they will be used throughout your ham career.
Ohm's & Power Calculation Combined
Frequency - Wavelength Conversion
Example: Increasing the power by 9 dB is equal to multiplying the watts by 8.
Resistor Color Code