Technician Class Frequencies

Technician Class Frequencies

By Joe Seibert, AL1F

Technician Class Frequencies Pages 62-69 in the W5YI book Terms to know…..

Frequency Wave length Band

Scientific Notation (Yuk! Math!)

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ALZHEIMERS' EYE TEST Count every " F" in the following

text:   FINISHED FILES ARE THE RE SULT OF YEA RS OF SCIENTI FIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS...

      HOW MANY “F”’s?

Wrong! There are Six F’s. The brain can’t process

“of”.

If you said there are three, your score is average.

If you said there are four, you’re very bright.

If you said there are five, you’re a genius. If you said there are six, then you should

be teaching this course!

Confusion sets in…

What is the difference between bands, wave length and frequencies?

Hams often refer to a range of frequencies as a “band”. For instance, a common technician band is 6 meters.

The 6 meter band includes frequencies ranging from 50-54 MHz.

Let’s talk about 6 meters…

The wave length is the actual distance a signal

travels in one complete cycle.

The band is a range of frequencies whose physical wave lengths are a specific length. In this case the physical wavelength is 6 meters.

Band= 6 meter wave length Frequency range within the 6 meter band=

50-54 MHz.

Relationship between frequency and wavelength

Wavelength is the term used for the distance a radio wave travels during one complete cycle.

The term Frequency describes the number of times that an alternating current flows back and forth per second.

Sixty (60) hertz (Hz) means 60 cycles per second.

9

The Relationship of Frequency and Wavelength

The distance a radio wave travels in one cycle is called wavelength.

One Wavelength

time

V+

V-

0V

One Cycle

Determining Wave length…

300 / freq in MHz= Wave length in meters

300/ 50 MHz= 6 meters

300/54 MHz= 5.555 meters

It’s IMPORTANT to note that as the frequency increases the wavelength decreases. Frequency and wavelength are inversely proportional.

So if you already know the wavelength of a signal, how do you determine frequency?

Getting freaky…..

Wave length (meters)/300 =Freq in MHz

300/2 meters= 150 MHz

Ham 2 Meter Band= 144 -148 MHz

Try to complete the work sheet in five minutes…..

Frequency Acronyms…

This is not on the exam, just good to know stuff.

ELF- extremely low freq(ELF)= 0- 30 Hz LF- low frequency(LF)= 30 Hz-300 KHz Medium Frequency (MF)= 300 KHz – 3 MHz High Frequency (HF)= 3 MHz – 30 MHz Very High Freq (VHF)= 30 MHz – 300 MHz Ultra High Freq (UHF)= 300 MHz – 3 GHz Super High Freq (SHF)- 3 GHz – 30 GHz

Now we know how to calculate wave length or frequency, right? So why do we even care about how long the wave is or what frequency we’re using?

Different frequencies/wavelengths are better for certain situations.

For instance….. VHF and UHF frequencies are considered

“line of sight”. They can be used effectively from 18-20 miles at ground level.

HF frequencies can be reflected off the ionosphere and travel farther distances.

Scientific Notation

The basic unit of measure for frequency is the Hertz (Hz).

3,000 Hz = 3 KHz (kilo) 3,000,000 Hz= 3 MHz (mega) 3,000,000,000 Hz= 3 GHz (giga)

Technician Privileges…

These are listed in the appendix of your book.

Band- Frequencies ModePower

160 m NONE 80 m3.525-3.6 MHz CW 200 w 40 m7.025-7.125 MHz CW 200 w 30 mNone 20 mNone 17 mNone 15 m21.025-21.2 MHz CW 200w

Band Frequencies Mode Power 12 m None 10 m 28.0-28.5 MHz CW 200 w 28.3-28.5 MHz Ph 200 w 6 m 50-54 MHz CW 200 w 50.1-54 MHz Ph 200 w 2 m 144 – 148 MHz ALL 1.25 m 222-225 MHz ALL 70 cm 420-450 MHz ALL

Band Frequencies ModePower

33 cm 902-928 MHz ALL 23 cm 1240-1300 MHz ALL AND……. 2300-2310 MHz 2390-3500 MHz 3300-3500 MHz 5650-5925 MHz

Question / Answer period. These are actual test questions. Please close your books.

How does the wavelength of a radio wave relate to it’s frequency?

A. The wave length gets longer as the frequency increases.

B. The wavelength gets shorter as the frequency increases.

C. There is no relationship between wavelength and frequency.

D. The wavelength depends on the bandwidth of the signal.

How does the wavelength of a radio wave relate to it’s frequency?

B. The wavelength gets shorter as the frequency increases.

Remember they’re inversely proportional, or opposites.

What is another way to specify the frequency of a radio signal that is oscillating at 1,500,000 Hertz?

A. 1500 KHz B. 1500 MHz C. 15 GHz D. 150 KHz

What is another way to specify the frequency of a radio signal that is oscillating at 1,500,000 Hertz?

A. 1500 KHz

1,500,000 Hz = 1500 KHz 1,500 KHz = 1.5 MHz 1.5 MHz= .0015 GHz

What is the frequency range of the 2 meter band in the USA?

A. 144 to 148 MHz B. 222 to 225 MHz C. 420 to 450 MHz D. 50 to 54 MHz

What is the frequency range of the 2 meter band in the USA?

A. 144 – 148 MHz

-Most popular Tech band -Majority of repeaters in this band

What amateur band are you using if you are operating on 223.5 MHz?

A. 15 meter band B. 10 meter band C. 2 meter band D. 1.25 meter band

What amateur band are you using if you are operating on 223.5 MHz?

D. the 1.25 meter band

By the way…. You can bring a calculator to the test session.

Which 70 centimeter frequency is authorized to a Technician class license holder operating in ITU Region 2? (The ITU stands for International Telecommunications Union. USA is in Region 2 of the ITU)

A. 455.35 MHz B. 146.52 MHz C. 443.35 MHz D. 222.52 MHz

Which 70 centimeter frequency is authorized to a Technician class license holder operating in ITU Region 2? (The ITU stands for International Telecommunications Union. USA is in Region 2 of the ITU)

C. 443.35 MHz

The 70 centimeter band is from 420 to 450 MHz.

What are sound waves in the range between 300 and 3000 Hertz called?

A. Test Signals B. Ultrasonic waves C. Voice frequencies D. Radio frequencies

What are sound waves in the range between 300 and 3000 Hertz called?

C. Voice frequencies

The human voice is normally found between 300 and 3KHz.

Electromagnetic waves that oscillate more than 20,000 times per second as they travel through space are generally referred to as what? A. Gravity waves B. Sound waves C. Radio waves D. Gamma radiation

Electromagnetic waves that oscillate more than 20,000 times per second as they travel through space are generally referred to as what?

C. Radio waves

All electromagnetic waves are radio waves. They have an eletrical field and a magnetic field at right angles to each other.

How fast does a radio wave travel through space?

A. The speed of light B. At the speed of sound C. It’s speed is inversely proportional

to it’s wave length D. It’s speed increases as the

frequency increases E. 17.45 MPH

How fast does a radio wave travel through space?

A. At the speed of light, 300,000,000 meters per second.

What term describes the number of times that an alternating current flows back and forth per second?

A. Pulse rate B. Speed C. Wave length D. Modulation E. Frequency

E. Frequency.

When we measure frequency we measure the number of times that current flows back and forth. The unit of measure used to be call CPS, cycles per second. Now we use the term Hertz.

What term describes the number of times that an alternating current flows back and forth per second?

What does 60 hertz mean?

A. 6000 cycles per second B. 6000 meters per second C. 60 cycles per second D. 60 meters per second

What is the standard unit of frequency?

A. The megacycle B. The Hertz C. One thousand cycles per second D. The electro-magnetic force

What is the standard unit of frequency?

B. The Hertz

What is the name for the distance a radio wave travels in one complete cycle?

A. Wave speed B. Wave form C. Wave length D. Wave spread

What is the name for the distance a radio wave travels in one complete cycle?

C. Wave length

What property of a radio wave is often used to identify the different bands amateur radio operators use?

A. The physical length of the wave B. The magnetic intensity of the

wave C. The time it takes for the wave to

travel one mile. D. The voltage standing wave ratio of

the wave.

What property of a radio wave is often used to identify the different bands amateur radio operators use?

A. the physical length of the wave

What is the formula for converting frequency to wave lengths in meters?

A. Wave length in meters equals frequency in Hertz multiplied by 300.

B. Wave length in meters equals frequency in Hertz divided by 300.

C. Wave length in meters equals frequency in megahertz divided by 300.

D. Wave length in meters equals 300 divided by frequency in megahertz.

What is the formula for converting frequency to wave lengths in meters?

D. Wave length in meters equals 300 divided by frequency in megahertz.

What is the frequency range of the 6 meter band in the United States?

A. 144 to 148 MHz B. 222 to 225 MHz C. 420 to 450 MHz D. 50 to 54 MHz

What is the frequency range of the 6 meter band in the United States?

D. 50 – 54 MHz

What is the frequency range of the 2 meter band in the United States?

A. 144 to 148 MHz B. 222 to 225 MHz C. 420 to 450 MHz D. 50 to 54 MHz

What is the frequency range of the 2 meter band in the United States?

A. 144 to 148 MHz

What emission modes are permitted in the restricted sub-band at 144.0 – 144.1 MHz?

A. CW only B. CW and RTTY C. SSB only D. CW and SSB

What emission modes are permitted in the restricted sub-band at 144.0 – 144.1 MHz?

A. CW only

CW- Continuous wave, AKA. Morse code

Which 23 centimeter frequency is authorized to a Technician Class license holder operating in ITU region 2?

A. 2315 MHz B. 1296 MHz C. 3390 MHz D. 146.25 MHz

Which 23 centimeter frequency is authorized to a Technician Class license holder operating in ITU region 2?

B. 1296 MHz

Questions?

Remember to take the practice exams at qrz.com and eham.net!