RADIOS BB OUTDOORS COURSE 2006. PART 1 CB RADIOS.

RADIOS

BB OUTDOORS COURSE 2006

PART 1

CB RADIOS

Why talk about radio’s

• Useful for when others are out of site, and for emergency situations.

• Mobile Phones often won’t work in the bush

• Just about everything these days uses radio waves, so it’s good to know something about them.

• For example Televisions AM/FM radios, CB’s, remote control cars, GPS systems, mobile phones, garage remotes, etc all use work with radio waves

SOME RADIO’SHAND HELD CB RADIO UHF

VECHICLE CB RADIO UHF

MILITARY MANPACK VHF RADIO

4WD WITH LONG DISTANCE HF

RADIO

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CB RADIOS

• CB stands for Citizens Band. These are a common two way radio anyone can get their hands on.

• You can’t just use any frequency for any purpose. Different frequencies are set aside for different uses.

• CB’S can be Hand held, or mounted in vehicles or buildings.

• There are two main types of CB 27MHZ and 477 MHZ

• CB’s are often used by truck drivers, or on construction or work sites, in vehicles by 4WDers, by trail bike riders, hikers, farmers etc…

Hand held and vehicle mounted

Hand held CB

Vehicle mount CB and antennas, common in 4WD’s trucks etc

Types of CB Radio in Australia

• 27 MHZ (HF) – Generally longer range, larger antennas, less features. (‘old’ type)

• 477 MHZ (UHF)– Clearer, line of sight, shorter range, more compact size, more features. MOST COMMON (‘new’ type)

RANGE

• 27 MHZ - up to about 30km

• 477 MHZ - 5-20Km.

Handheld units up to 5km.

These figures will vary depending on particular situation

Channel usage in Australia

27 MHZ CB’s

CHANNEL MHZ USE FOR

1 26.965 Conversation







8 27.055 Road

9 27.065 EMERGENCY


11 27.085 Call





16 27.155 Call




You can’t use just any channel for any usage here are the rules






















CHANNEL MHZ USE

1 476.425 Repeaters

2 476.45 Repeaters

3 476.475 Repeaters

4 476.5 Repeaters

5 476.525 Repeaters/EMERGENCY

6 476.55 Repeaters

7 476.575 Repeaters

8 476.6 Repeaters

9 476.625 Conversations


11 476.675 Calling











22 476.95 DATA ONLY

23 476.975 DATA ONLY

24 477 Conversations







31 477.175 Repeaters

32 477.2 Repeaters


34 477.25 Repeaters

35 477.275 Repeaters/EMERGENCY

36 477.3 Repeaters


38 477.35 Repeaters


40 477.4 Highway/Road

477 MHZ UHF Designated channel usage

Only use EMERGENCY channels for EMERGENCIES!

When in range of repeaters, only use repeater channels as repeaters

Use Call channel to establish initial communications, then move to another channel

DATA channels only for data, no voice

Channel usage in Australia

Using a CB

Before you leave• Do a Radio Check, call each other to check it is all working.• Choose a channel to use, make sure everyone knows which one.• Choose the correct channels for conversations and Emergency.• Check Radio condition and batteries.

Having trouble communicating?• Use a higher power setting.• Go to the top of a hill or raise your antenna higher.• Speak clearly and slowly if necessary.• Try moving closer to the other person.• You will may get better comm’s over large areas of water and flat or

wet ground than dry ground or forests.• Do not waste batteries, but in an emergency don’t stop trying either.• Look after your radio and it’s antenna. It could be your best lifeline

in an emergency.

Using a CB

Communicating• 27MHz CB’s generally have better range than 477MHz

CB’s but are not as clear (due to the lower frequency).• Don’t interrupt in the middle of conversations, it gets very

confusing.• Please don’t fill the air waves with immature crap.

Note• For long distance outback travel you would use a HF

radio or Satellite phone. CB radio range is too short.

RADIOS BB OUTDOORS COURSE 2006. PART 1 CB RADIOS.

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