Amateur Radio Electronics & Circuit Fundamentals

⚡ Course Overview: Amateur Radio Electronics & Circuit Fundamentals

Master the practical electronics that power amateur radio: DC and AC electricity, active RF semiconductors, linear power supplies, resonant circuits, and transceiver filtering without unnecessary abstract calculus.

Course Enrollment Fee: $5.00 USD (Special Affordable Pricing)
Curriculum Workload: 5 Comprehensive Academic Modules | 14 Practical English Lessons | 5 Modular Quizzes (50 Questions Each, 30 Minutes Exam Time)
Final Evaluation: 1 Final Comprehensive Mock Examination (100 Questions, 60 Minutes Exam Time)
Total Question Bank: Exactly 350 Verified Questions in this Course (6 Quizzes total)
Interactive Tools Included: S21AMF Radio Tools Hub (Antenna Calculator, Coax Loss Estimator, Circuit Decoders)
Student Support Desk: Integrated 24/7 Ticketing Helpdesk & AI Study Assistant for instant answers to circuit questions
Lead Instructor: Dr. Sheikh Md. Mahtabur Rahman (Callsign: S21AMF), Rangpur, Bangladesh

Core Competencies You Will Develop

✓ Direct Current & Passive Components

Ohm's Law, Joule's Law, resistor color codes, capacitor charge dynamics, and inductor reactance (XL).

✓ Active Semiconductors & RF Amplifiers

Diodes, bipolar transistors (BJTs), power MOSFETs, biasing classes (Class A, AB, C), and thermal stabilization.

✓ Regulated Power Supplies

Transformer isolation, bridge rectifiers, 100 Hz ripple smoothing, linear regulator pass transistors, and crowbar protection.

✓ Resonant Circuits, Filters & Mixers

RLC resonance, Q-factor, harmonic suppression low-pass filters, superheterodyne mixers, and direct-sampling SDRs.

Curriculum & Examination Syllabus

Module 1: DC Electricity, Ohm's Law & Passive Components 3 Lessons + 50-Question Quiz

Lesson 1.1: Voltage, Current, Resistance & Ohm's Law Master Guide

Lesson 1.2: Capacitors, Inductors & Time Constants (RC/RL)

Lesson 1.3: Alternating Current, Frequency & Reactance

📝 Module 1 Assessment: 50 Questions (Exam Duration: 30 Minutes)

Module 2: Semiconductors & Active RF Devices 3 Lessons + 50-Question Quiz

Lesson 2.1: Diodes (Rectifier, Zener, Schottky & Varicap)

Lesson 2.2: Bipolar Junction Transistors (BJTs) & Amplification Classes

Lesson 2.3: Field Effect Transistors (FETs) & RF Power MOSFETs

📝 Module 2 Assessment: 50 Questions (Exam Duration: 30 Minutes)

Module 3: Power Supply Design & Station DC Distribution 3 Lessons + 50-Question Quiz

Lesson 3.1: AC Mains Transformers, Rectification & Ripple Filtering

Lesson 3.2: Linear vs. Switch-Mode Power Supplies (RFI Prevention)

Lesson 3.3: Over-Voltage Crowbar Protection, Fusing & DC Cabling

📝 Module 3 Assessment: 50 Questions (Exam Duration: 30 Minutes)

Module 4: Resonant Circuits, RF Filters & Transceiver Blocks 3 Lessons + 50-Question Quiz

Lesson 4.1: Series and Parallel RLC Resonant Circuits & Q-Factor

Lesson 4.2: Transmitter Harmonic Suppression Low-Pass Filters (LPF)

Lesson 4.3: Heterodyne Mixing, Intermediate Frequency (IF) & Direct Sampling SDR

📝 Module 4 Assessment: 50 Questions (Exam Duration: 30 Minutes)

Module 5: Solid-State RF Circuit Design & RFI Engineering 2 Lessons + 50-Question Capstone Quiz

Lesson 6.1: Solid-State RF Design: Transistors, Op-Amps & Mixer Circuits

Lesson 6.2: RFI Mitigation & Grounding Engineering: Ferrite Chokes & Ground Loops

📝 Module 5 Capstone Assessment: 50 Questions (Exam Duration: 30 Minutes)

Final Module: Course Certification Examination Final Mock Exam

Comprehensive Evaluation: 100 Randomly Selected Questions covering all electronics modules.

🎓 Final Examination: 100 Questions (Duration: 60 Minutes, 80% passing grade to receive certificate)