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Franklin County Amateur Radio Club Technician Class License Course Chris Myers KB1NEK

Franklin County Amateur Radio Club Technician Class License Course Chris Myers KB1NEK Bob Dickerman WA1QKT Al Woodhull N1AW Bob Solosko W1SRB (original author). Local Communications. Building Equipment. Rag Chewing. Public Service. CW Phone Digital. Emergency. Worldwide.

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Franklin County Amateur Radio Club Technician Class License Course Chris Myers KB1NEK

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  1. Franklin County Amateur Radio Club Technician Class License Course Chris Myers KB1NEK Bob Dickerman WA1QKT Al Woodhull N1AW Bob Solosko W1SRB (original author)

  2. Local Communications Building Equipment Rag Chewing Public Service CW Phone Digital Emergency Worldwide Communications Communications The Ham Radio Puzzle Contests Experimenting

  3. Number of questions in each area 35 questions, 26 correct to pass

  4. Frequency The number of times something happens per unit time crest trough water, rope, sound, radio (mechanical vs. EM)

  5. Frequency Modern unit of frequency is the “Hertz” 1 Hertz = 1 Cycle Per Second Heinrich Hertz In 1886, first to demonstrate the existence of electromagnetic waves

  6. Frequency Units • Hz = Hertz = cycles per second • KHz = Kilohertz = 1,000 Hz • MHz = Megahertz = 1,000,000 Hz = 1,000 KHz • GHz = Gigahertz = 1,000,000,000 Hz = 1,000,000 KHz = 1,000 MHz

  7. LF (Low Frequency) MF (Medium Frequency) HF (High Frequency) VHF (Very High Frequency) UHF (Ultra High Frequency) SHF (Super High Frequency) 30 kHz 300 kHz 3 MHz 30 MHz 300 MHz 3 GHz 30 GHz Frequency Ranges

  8. AM Broadcast FM Broadcast TV Broadcast Cellular Phones Cellular Phones 100 kHz 1 MHz 10 MHz 100 MHz 1 GHz 10 GHz The Radio Spectrum TV Frequency WHMP AM 1240 (KHz) TV Channel 3 (61.25 MHz) WPVQ FM Bear Country 95.3 (MHz)

  9. AM Broadcast FM Broadcast TV Broadcast Cellular Phones Cellular Phones Local Communications Worldwide Communications 100 kHz 1 MHz 10 MHz 100 MHz 1 GHz 10 GHz The Radio Spectrum Frequency • Range (Propagation) • Antenna size • Bandwidth

  10. Wavelength  (distance between wave troughs) water, rope, sound, radio (mechanical vs. EM)

  11. Relationship Between Frequency f and Wavelength  • Frequency is cycles per second: • 1 cycle per second = 1 Hz (Hertz) • if freq = 1,000,000 Hz (1 MHz), then 1 cycle takes 1/1,000,000 sec = period • Speed of Light = 300,000,000 meters per second(speed of radio wave in a vacuum) • if freq = 1 MHz, then in one cycle, radio wave travels • distance = speed x time • distance = 300,000,000 m/sec x (1/1,000,000 sec) = 300 meters = wavelength (λ)

  12. Relationship Between Frequency f and Wavelength  • = c / f • = 300 / f (For  in meters, f in MHz) Bigger f, smaller 

  13. AM Broadcast FM Broadcast TV Broadcast Cellular Phones Cellular Phones 100 kHz 3000 m 1 MHz 300 m 10 MHz 30 m 100 MHz 3 m 1 GHz 0.3 m 10 GHz 0.03 m The Radio Spectrum Frequency Wavelength Bigger f, smaller 

  14. Find f, given  We know:  = 300 / f (For  in meters, f in MHz) So, f = 300 / (For  in meters, f in MHz) (algebra – or, whatever you have, put in denominator)

  15. http://www.arrl.org/files/file/Hambands_color.pdf

  16. http://www.arrl.org/files/file/Hambands_color.pdf

  17. LF MF HF VHF UHF SHF 30 kHz 300 kHz 3 MHz 30 MHz 300 MHz 3 GHz 30 GHz FCARC Repeaters 2 m (144 MHz – 148 MHz) 70c m (420 MHz – 450 MHz) 448.875 MHz 146.985 MHz

  18. Sample Questions http://www.arrl.org/tech-question-pool T1B03 (B) [97.301(a)] Which frequency is within the 6 meter band? A. 49.00 MHz B. 52.525 MHz C. 28.50 MHz D. 222.15 MHz ~~ T1B04 (A) [97.301(a)] Which amateur band are you using when your station is transmitting on 146.52 MHz? A. 2 meter band B. 20 meter band C. 14 meter band D. 6 meter band ~~ T1B05 (C) [97.301(a)] Which 70 cm frequency is authorized to a Technician Class license holder operating in ITU Region 2? A. 53.350 MHz B. 146.520 MHz C. 443.350 MHz D. 222.520 MHz

  19. More Sample Questions http://www.arrl.org/tech-question-pool T1B11 (A) [97.305 (a)(c)] What emission modes are permitted in the mode-restricted sub-bands at 50.0 to 50.1 MHz and 144.0 to 144.1 MHz? A. CW only B. CW and RTTY C. SSB only D. CW and SSB T3B09 (D) What are the frequency limits of the UHF spectrum? A. 30 to 300 kHz B. 30 to 300 MHz C. 300 to 3000 kHz D. 300 to 3000 MHz ~~ T3B10 (C) What frequency range is referred to as HF? A. 300 to 3000 MHz B. 30 to 300 MHz C. 3 to 30 MHz D. 300 to 3000 kHz ~~ T3B11 (B) What is the approximate velocity of a radio wave as it travels through free space? A. 3000 kilometers per second B. 300,000,000 meters per second C. 300,000 miles per hour D. 186,000 miles per hour ~~

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