Question 1

Research the FCC (Federal Communication Commission) guidelines on low-power radio transmitters requiring no licenses. Determine what the maximum power output is, frequency range(s), antenna lengths, transmission time, and any other restrictions relevant to building a small transmitter circuit.


Question 2

In the very early days of radio communication, a popular style of transmitter was the spark gap circuit. Explain how this circuit functioned, and why it is no longer used as a practical transmitter design.


Question 3

How is the frequency of your transmitter’s oscillator circuit established? What would you have to do to change that frequency?


Question 4

Explain the difference between AM (Amplitude Modulation) and FM (Frequency Modulation).


Published under the terms and conditions of the Creative Commons Attribution License