Nature of Amateur Radio

Question 1

What are some aspects of amateur radio?
What are some modes of amateur radio?
What are some modulation patterns?

Answer 1

HF, VHF, UHF and Micowave.
Voice, Morse, Data/Telemetry, SlowScan Images/TV.
Modulation: CW, AM, SSB FSB, PSK31

Question 2

Describe some differences between Frequency and Wavelength.

Answer 2

Antenna Sizes are proportional to wave length. (Higher frequencies use smaller antennas)

Question 3

Who licenses OFCOM?

Answer 3

Regulators such as OFCOM allocate specific bands to amateurs in the Licence Frequency Schedule

Question 4

Describe some common ranges Radio Frequencies?

Answer 4

HF: 3-30 MHz
VHF: 30-300 MHz
UHF: >300 MHz

Compare with UK AC Mains: 50Hz
What is the General Audio (AF) for Normal Hearing: 100Hz-15kHz
Frequency for Audio Communications: 300Hz-3 KHz

Question 5

Memorise these bands

Answer 5

HF (3-30MHz): 7MHz = 40m
10MHz = 30m 29 MHz=10m (10-40m) :

Band width
VHF: 50 MHz = 6m 145 Mhz = 2m (2-6m)

UHF: 430 MHz = 70 cms