UHF CB 80 Channels

IMPORTANT INFORMATION CONCERNING UHF CB RADIO

The use of the Citizen Band radio service is licensed in Australia by the ACMA radio communications (Citizens Band radio stations) Class Licence. A General User Radio Licence for Citizens Band radio and operation is subject to conditions contained in those licences. The class licence for users and equipment operating in the CB/PRS 477 MHz band has been amended. This radio meets the new 80 channel standard.

In simple terms the same amount of spectrum is available; however, radio transceivers can now operate in a narrower bandwidth and hence use less spectrum. These radios are generally referred to as narrowband or 12.5 kHz radios. By using 12.5 kHz channel spacing instead of 25 kHz, the 40 channels originally allocated can now be expanded to 80 channels thereby doubling the channel capacity and relieving congestion in the UHF
CB/PRS band. Original 40 channel wideband Radios will continue to operate on the original 40 channels, however they will not be able to converse on the newer channels 41 – 80.

The newer narrowband radios will be able to converse with all older 40 channel wideband radios on all channels 1 to 40 as well as the newer channels allocated from 41 to 80.

The mixing of narrowband and wideband radios in the same spectrum can cause some possible operating issues of interference and varying levels of received volume.

When a new narrowband radio receives a transmission from an older wideband radio the speech may sound loud and distorted – simply adjust your radio volume for best performance.

When an older wideband radio receives a signal from a new narrowband radio, the speech may sound quiet – simply adjust your radio volume for best performance.

Depending on how close your receiving radio is to another transmitting radio, there can be interference from the transmitting radio if it is using a channel adjacent to the channel you are listening to. Simply try going up or down a few channels from the currently selected channel.


The above situations are not a fault of the radio but a symptom of operating wideband and narrowband radios in the same bandwidth. This possible interference will decrease over time as the population of wideband radios ages and decreases.


Further information and updates are available from the Australian Communications
and Media Authority (ACMA) at www.acma.gov.au

80 Channel Frequency List

Below is the Official Frequency Allocation for UHF CB in Australia.

Channel: Frequency: Mode & Use: Channel Spacing:
  01  476.4250 Duplex  Repeater Output ~ (Channel 31 Input) NB12.5KHz
  02  476.4500 Duplex  Repeater Output (Channel 32 Input) NB12.5KHz
  03  476.4750 Duplex  Repeater Output ~ (Channel 33 Input) NB12.5KHz
  04  476.5000 Duplex  Repeater Output ~ (Channel 34 Input) NB12.5KHz
  05  476.5250 Duplex  Repeater Output  (Emergency Channel) NB12.5KHz
  06  476.5500 Duplex  Repeater Output ~ (Channel 36 Input) NB12.5KHz
  07  476.5750 Duplex  Repeater Output ~ (Channel 37 Input) NB12.5KHz
  08  476.6000 Duplex  Repeater Output ~ (Channel 38 Input) NB12.5KHz
  09  476.6250 Simplex NB12.5KHz
  10  476.6500 Simplex NB12.5KHz
  11  476.6750 Simplex  Call Channel NB12.5KHz
  12  476.7000 Simplex NB12.5KHz
  13  476.7250 Simplex NB12.5KHz
  14  476.7500 Simplex NB12.5KHz
  15  476.7750 Simplex NB12.5KHz
  16  476.8000 Simplex NB12.5KHz
  17  476.8250 Simplex NB12.5KHz
  18  476.8500 Simplex NB12.5KHz
  19  476.8750 Simplex NB12.5KHz
  20  476.9000 Simplex NB12.5KHz
  21  476.9250 Simplex NB12.5KHz
  22  476.9500 Simplex  Data & Telemetry Only (No Voice or Packet) WB25KHz
  23  476.9750 Simplex  Data & Telemetry Only (No Voice or Packet) WB25KHz
  24  477.0000 Simplex NB12.5KHz
  25  477.0250 Simplex NB12.5KHz
  26  477.0500 Simplex NB12.5KHz
  27  477.0750 Simplex NB12.5KHz
  28  477.1000 Simplex NB12.5KHz
  29  477.1250 Simplex NB12.5KHz
  30  477.1500 Simplex NB12.5KHz
  31  477.1750 Repeater Input  For Channel 01 NB12.5KHz
  32  477.2000 Repeater Input  For Channel 02 NB12.5KHz
  33  477.2250 Repeater Input  For Channel 03 NB12.5KHz
  34  477.2500 Repeater Input  For Channel 04 NB12.5KHz
  35  477.2750 Repeater Input  For Channel 05  (Emergency Channel) NB12.5KHz
  36  477.3000 Repeater Input  For Channel 06 NB12.5KHz
  37  477.3250 Repeater Input  For Channel 07 NB12.5KHz
  38  477.3500 Repeater Input  For Channel 08 NB12.5KHz
  39  477.3750 Simplex NB12.5KHz
  40  477.4000 Simplex  Highway/Road Channel NB12.5KHz
  41  476.4375 Duplex  Repeater Output ~ (Channel 71 Input) NB12.5KHz
  42  476.4625 Duplex  Repeater Output ~ (Channel 72 Input) NB12.5KHz
  43  476.4875 Duplex  Repeater Output ~ (Channel 73 Input) NB12.5KHz
  44  476.5125 Duplex  Repeater Output ~ (Channel 74 Input) NB12.5KHz
  45  476.5375 Duplex  Repeater Output ~ (Channel 75 Input) NB12.5KHz
  46  476.5625 Duplex  Repeater Output ~ (Channel 76 Input) NB12.5KHz
  47  476.5875 Duplex  Repeater Output ~ (Channel 77 Input) NB12.5KHz
  48  476.6125 Duplex  Repeater Output ~ (Channel 78 Input) NB12.5KHz
  49  476.6375 Simplex NB12.5KHz
  50  476.6625 Simplex NB12.5KHz
  51  476.6875 Simplex NB12.5KHz
  52  476.7125 Simplex NB12.5KHz
  53  476.7375 Simplex NB12.5KHz
  54  476.7625 Simplex NB12.5KHz
  55  476.7875 Simplex NB12.5KHz
  56  476.8125 Simplex NB12.5KHz
  57  476.8375 Simplex NB12.5KHz
  58  476.8625 Simplex NB12.5KHz
  59  476.8875 Simplex NB12.5KHz
  60  476.9125 Simplex NB12.5KHz
  61  476.9375 NO TRANSMIT. Reserved For Future Expansion
  62  476.9625 NO TRANSMIT. Reserved For Future Expansion
  63  476.9875 NO TRANSMIT. Reserved For Future Expansion
  64  477.0125 Simplex NB12.5KHz
  65  477.0375 Simplex NB12.5KHz
  66  477.0625 Simplex NB12.5KHz
  67  477.0875 Simplex NB12.5KHz
  68  477.1125 Simplex NB12.5KHz
  69  477.1375 Simplex NB12.5KHz
  70  477.1625 Simplex NB12.5KHz
  71  477.1875 Repeater Input  For Channel 41 NB12.5KHz
  72  477.2125 Repeater Input  For Channel 42 NB12.5KHz
  73  477.2375 Repeater Input  For Channel 43 NB12.5KHz
  74  477.2625 Repeater Input  For Channel 44 NB12.5KHz
  75  477.2875 Repeater Input  For Channel 45 NB12.5KHz
  76  477.3125 Repeater Input  For Channel 46 NB12.5KHz
  77  477.3375 Repeater Input  For Channel 47 NB12.5KHz
  78  477.3625 Repeater Input  For Channel 48 NB12.5KHz
  79  477.3875 Simplex NB12.5KHz
  80  477.4125 Simplex NB12.5KHz

NOTE: Don’t Use Repeater Inputs For Simplex Operation. You will be Rebroadcast all over the coverage area of that repeater. Plus you are interfering with normal operation of the repeater.