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Ham College episode 133 is now available for download.

Technician Exam Questions Part 20.
T6C – Circuit diagrams: use of schematics, basic structure, Schematic symbols of basic components.
T6D – Component functions: rectifiers, relays, voltage regulators, meters, indicators, integrated circuits, transformers, Resonant circuit, Shielding.

This episode of Ham College (0:00-39:27) focuses on electrical diagrams and component functions, which are crucial for the Technician Exam. The hosts, Professor Thomas and Dean Martin, go through several multiple-choice questions related to identifying components in circuit diagrams and understanding their roles.

Key topics covered include:

Circuit Diagrams (2:17-2:25): The discussion begins with identifying a schematic as an electrical wiring diagram using standard component symbols.
Component Identification (4:23-17:48): The hosts quiz each other on recognizing various components in schematics, such as:
Resistors (4:23-5:12)
Transistors (5:23-6:16)
Indicator Lamps (6:26-7:12)
Batteries (7:16-8:26)
Capacitors (8:43-9:55)
Light Emitting Diodes (LEDs) (9:58-11:39)
Variable Resistors (11:49-13:02)
Transformers (13:08-15:02)
Variable Inductors (15:06-16:16)
Antennas (16:30-17:10)
Component Functions (23:36-33:24): The latter part of the episode delves into the functions of various electrical components:
Rectifiers (23:36-24:43) are discussed as devices that convert alternating current (AC) to direct current (DC).
Relays (24:43-25:30) are defined as electrically controlled switches.
Meters (25:30-26:10) are explained as tools that display electrical quantities numerically.
Voltage Regulators (26:11-27:00) are identified as circuits that control voltage from a power supply.
Transformers (27:01-27:56) are highlighted for their ability to change AC voltage.
LEDs (28:25-29:07) are noted as common visual indicators.
Resonant Circuits (29:08-30:16) are explained as combinations of inductors and capacitors.
Integrated Circuits (30:22-31:16) are described as devices combining multiple semiconductors and components into one package.
Transistors (31:20-32:04) are described as controlling current flow.
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