New Technician Practice Exam!

[note: this post is almost 4 years old (as of March 2024), the exams have changed, and well, its just outdated. You’re still welcome to use this. Understand its not updated, it has errors, and it may stop working at some point.] Hey everyone, just wanted to let you know that I’ve added a Technician … Read more

Antenna Gain dBi vs. dBd

Effective Radiated Power

How does antenna gain stated in dBi compare to gain stated in dBd for the same antenna? A. dBi gain figures are 2.15 dB lower than dBd gain figuresB. dBi gain figures are 2.15 dB higher than dBd gain figuresC. dBi gain figures are the same as the square root of dBd gain figures multiplied … Read more

PIN Diode RF Attenuation

Microwave Switch

What is used to control the attenuation of RF signals by a PIN diode? A. Forward DC bias current B. A sub-harmonic pump signal C. Reverse voltage larger than the RF signal D. Capacitance of an RF coupling capacitor [E6B11] This question from the new Amateur Extra question pool dives head first into the operation … Read more