Lesson 6: Practical Circuits

Lesson 6 of 10, syllabus topic G7. The exam asks 3 questions from this topic, one from each of its 3 groups.

Practical circuits assemble those components into power supplies, amplifiers, oscillators and filters.

What you will learn

G7A Power supplies; schematic symbols
G7B Digital circuits; amplifiers and oscillators
G7C Transceiver design; filters; oscillators; digital signal processing (DSP)

1. Read

Building your own gear: Power supply safetyHelps with G7A
All 38 G7 questions with their answers and explanationsEvery group, with the rule or source behind each answer

2. Explore

Schematic symbols
Practice the symbols drawn in exam figure G7-1.
Low-pass filter designer
Design a low-pass filter for an HF band and see how strongly it attenuates the second harmonic of your transmitter.

3. Practice

Practice one group at a time. A group is ready when you have answered every one of its questions and learned at least 80 percent of them; a question counts as learned when your last three answers to it were correct. To review quickly, go through this lesson’s questions as flashcards.

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