Sun. Dec 3rd, 2023


#1. Which layer of the Earth's atmosphere is responsible for reflecting radio waves back to Earth?

#2. What is the maximum usable frequency (MUF)?

#3. What is the critical frequency?

#4. What is the skip distance?

#5. Which layer of the ionosphere is most important for long-distance radio communication?

#6. What is the F2 layer?

#7. What is ionospheric absorption?

#8. What is a sunspot?

#9. How does solar activity affect radio communication?

#10. What is the layer of the ionosphere that is closest to the Earth's surface?


๐Ÿ›ฐ๏ธ Amateur Satellite Operations
๐Ÿ“œ Rules & Regs
๐Ÿ“‘ Operational Regulations
๐Ÿšซ Station Control & Restrictions
๐Ÿ‘ฅ Volunteer Examiner Regulations
๐ŸŒ Propagation
๐Ÿ“ก HF Propagation Factors
๐Ÿ“ก VHF+ Propagation Factors
๐Ÿ’ป Digital Modes
๐Ÿ’พ Digital Encoding Concepts
๐Ÿ”‘ Frequency Shift Keying Modes
๐Ÿ“จ Digital Packet Modes
๐Ÿ’ป Additional Digital Modes
๐Ÿ“บ Amateur TV
โšก Electrical Circuit Principles
๐Ÿ”Œ Complex Impedance
๐Ÿ’ก Real & Apparent Power
๐ŸŒ€ Resonant Circuits and Q
๐Ÿ› ๏ธ Hamtronics I: Components
๐Ÿงฒ Inductors & Cores
๐Ÿ’ป Semiconductor Components
๐Ÿ“ก VHF+ Component Packaging
๐Ÿ”† Photovoltaics & Optoelectronics
๐Ÿ’ป Digital Logic Devices
๐Ÿ› ๏ธ Hamtronics II: Analog Circuits
๐Ÿ”Š Amplifiers
๐Ÿ“ถ Filters & Matching Networks
๐Ÿ”Œ Power Regulators & Supplies
๐Ÿ”‰ Oscillators & Signal Generators
๐Ÿ“ˆ Processing Signals
๐Ÿ”’ Modulation & Demodulations
๐ŸŽ™๏ธ FM Signal Processing
๐Ÿ’พ Digital Signal Processing
๐Ÿ“Š Station Performance Measurement
๐Ÿ”‡ Noise & Spurious Emissions
๐Ÿ“ Measuring Performance
๐Ÿ“ก Antennas
๐Ÿ“ก Types of Antennas
๐Ÿ’ป Performance Factors
๐Ÿ”Œ Impedance Matching & Phasing
๐Ÿ”— Transmission Lines
๐Ÿ“ˆ Smith Chart
๐Ÿ“ก Special Antennas
โš ๏ธ Safety

By 26 DT716 Steven

As one of the the News Editors for The Delta Tango DX Group. I would like to encourage you to share your expertise with the rest of our community. Writing articles or creating videos that highlight your experiences and knowledge can be an excellent way to give back and assist others who are just starting out in the hobby. We are more than happy to publish any articles or content you create on our Network News Pages. So, don't hesitate to share your insights and help us all grow together!

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