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’S HAND HELD CB RADIO UHF VECHICLE CB RADIO UHF MILITARY MANPACK VHF RADIO 4WD WITH LONG DISTANCE HF RADIO
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 CHANNELMHZUSE FOR 126.965Conversation 226.975Conversation 326.985Conversation 427.005Conversation 527.015Conversation 627.025Conversation 727.035Conversation 827.055Road 927.065EMERGENCY 1027.075Conversation 1127.085Call 1227.105Conversation 1327.115Conversation 1427.125Conversation 1527.135Conversation 1627.155Call 1727.165Conversation 1827.175Conversation 1927.185Conversation You can’t use just any channel for any usage here are the rules 2027.205Conversation 2127.215Conversation 2227.225Conversation 2327.245Conversation 2427.235Conversation 2527.255Conversation 2627.265Conversation 2727.275Conversation 2827.285Conversation 2927.295Conversation 3027.305Conversation 3127.315Conversation 3227.325Conversation 3327.335Conversation 3427.345Conversation 3527.355Conversation 3627.365Conversation 3727.375Conversation 3827.385Conversation 3927.395Conversation 4027.405Conversation
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.