Sawtron 200 UHF CB Radio

Australian 80 Channel UHF Frequency List

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

The Sawtron 200 UHF 40 Channel CB Radio photo is from the seventies and is a console that used the

Sawtron 880 Mobile UHF CB as the Transmit and Receive component attached with a flying lead.

This unit was modified to use CTSS on RX but had TX as standard. Unfortunately no UHF Repeater switch.

This unit is still used to this time and a credit to the quality Manufacturer Kyodo in Japan.


Ch#: Frequency: Mode & Use: Channel Spacing:
01 476.4250 Duplex Repeater Output ~ (Channel 31 Input) NB-12.5KHz
02 476.4500 Duplex Repeater Output ~ (Channel 32 Input) NB-12.5KHz
03 476.4750 Duplex Repeater Output ~ (Channel 33 Input) NB-12.5KHz
04 476.5000 Duplex Repeater Output ~ (Channel 34 Input) NB-12.5KHz
05 476.5250 Duplex Repeater Output (Emergency Channel) NB-12.5KHz
06 476.5500 Duplex Repeater Output ~ (Channel 36 Input) NB-12.5KHz
07 476.5750 Duplex Repeater Output ~ (Channel 37 Input) NB-12.5KHz
08 476.6000 Duplex Repeater Output ~ (Channel 38 Input) NB-12.5KHz
09 476.6250 Simplex NB-12.5KHz
10 476.6500 Simplex 4WD Convoy Clubs & National Parks NB-12.5KHz
11 476.6750 Simplex Call NB-12.5KHz
12 476.7000 Simplex NB-12.5KHz
13 476.7250 Simplex NB-12.5KHz
14 476.7500 Simplex NB-12.5KHz
15 476.7750 Simplex NB-12.5KHz
16 476.8000 Simplex NB-12.5KHz
17 476.8250 Simplex NB-12.5KHz
18 476.8500 Simplex Caravan Campervan & Convoy NB-12.5KHz
19 476.8750 Simplex NB-12.5KHz
20 476.9000 Simplex NB-12.5KHz
21 476.9250 Simplex NB-12.5KHz
22 476.9500 Simplex Data & Telemetry Only (No Voice or Packet) WB-25KHz
23 476.9750 Simplex Data & Telemetry Only (No Voice or Packet) WB-25KHz
24 477.0000 Simplex NB-12.5KHz
25 477.0250 Simplex NB-12.5KHz
26 477.0500 Simplex NB-12.5KHz
27 477.0750 Simplex NB-12.5KHz
28 477.1000 Simplex NB-12.5KHz
29 477.1250 Simplex Pacific Hwy (NSW) & Bruce Hwy (QLD) NB-12.5KHz
–  30 477.1500 Simplex – Local Alert & Broadcasts Channel NB-12.5KHz
31 477.1750 Repeater Input For Channel 01 NB-12.5KHz
32 477.2000 Repeater Input For Channel 02 NB-12.5KHz
33 477.2250 Repeater Input For Channel 03 NB-12.5KHz
34 477.2500 Repeater Input For Channel 04 NB-12.5KHz
35 477.2750 Repeater Input For Channel 05 (Emergency Channel) NB-12.5KHz
36 477.3000 Repeater Input For Channel 06 NB-12.5KHz
37 477.3250 Repeater Input For Channel 07 NB-12.5KHz
38 477.3500 Repeater Input For Channel 08 NB-12.5KHz
39 477.3750 Simplex NB-12.5KHz
40 477.4000 Simplex Highway/Road Channel NB-12.5KHz
41 476.4375 Duplex Repeater Output ~ (Channel 71 Input) NB-12.5KHz
42 476.4625 Duplex Repeater Output ~ (Channel 72 Input) NB-12.5KHz
43 476.4875 Duplex Repeater Output ~ (Channel 73 Input) NB-12.5KHz
44 476.5125 Duplex Repeater Output ~ (Channel 74 Input) NB-12.5KHz
45 476.5375 Duplex Repeater Output ~ (Channel 75 Input) NB-12.5KHz
46 476.5625 Duplex Repeater Output ~ (Channel 76 Input) NB-12.5KHz
47 476.5875 Duplex Repeater Output ~ (Channel 77 Input) NB-12.5KHz
48 476.6125 Duplex Repeater Output ~ (Channel 78 Input) NB-12.5KHz
49 476.6375 Simplex NB-12.5KHz
50 476.6625 Simplex NB-12.5KHz
51 476.6875 Simplex NB-12.5KHz
52 476.7125 Simplex NB-12.5KHz
53 476.7375 Simplex NB-12.5KHz
54 476.7625 Simplex NB-12.5KHz
55 476.7875 Simplex NB-12.5KHz
56 476.8125 Simplex NB-12.5KHz
57 476.8375 Simplex NB-12.5KHz
58 476.8625 Simplex NB-12.5KHz
59 476.8875 Simplex NB-12.5KHz
60 476.9125 Simplex NB-12.5KHz
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 NB-12.5KHz
65 477.0375 Simplex NB-12.5KHz
66 477.0625 Simplex NB-12.5KHz
67 477.0875 Simplex NB-12.5KHz
68 477.1125 Simplex NB-12.5KHz
69 477.1375 Simplex NB-12.5KHz
70 477.1625 Simplex NB-12.5KHz
71 477.1875 Repeater Input For Channel 41 NB-12.5KHz
72 477.2125 Repeater Input For Channel 42 NB-12.5KHz
73 477.2375 Repeater Input For Channel 43 NB-12.5KHz
74 477.2625 Repeater Input For Channel 44 NB-12.5KHz
75 477.2875 Repeater Input For Channel 45 NB-12.5KHz
76 477.3125 Repeater Input For Channel 46 NB-12.5KHz
77 477.3375 Repeater Input For Channel 47 NB-12.5KHz
78 477.3625 Repeater Input For Channel 48 NB-12.5KHz
79 477.3875 Simplex NB-12.5KHz
80 477.4125 Simplex NB-12.5KHz


The operation of Australian Citizen Band (CB) radios is authorised by ACMA under.

Class licences

Class licences are issued by the Australian Communications and Media Authority (the ACMA). Under a class licence, all users share the same spectrum segment and are subject to the same conditions. A class licence governs equipment standards and the frequencies that may be used, and can specify other technical and operational parameters. Class licences do not have to be applied for, and no licence fees are payable.

The use of devices covered by a class licence is subject to specific conditions in the class licence as well as the provisions of the Radiocommunications Act 1992 (the Act).

Citizen band radio service

The Citizen Band Radio Service (CBRS) is a two-way, short distance, communications service that can be used by any person in Australia, whether it is for recreational or domestic purposes, or in connection with work or business.

CBRS may be used for:

  1. any form of voice communications activity
  2. telemetry and telecommand applications.

CBRS repeater stations need specific frequency assignments and are licensed individually under apparatus licensing arrangements and are subject to licence fees.

Conditions of operation

Operating frequencies

The CBRS operates on designated channels in two distinct frequency bands:

  1. HF – 26.965 MHz to 27.405 MHz (inclusive)
  2. UHF – 476.4125 to 477.4125 MHz (inclusive).

CB radios must only be operated on these channels. An earlier equipment specification, RB249, allowed the use of two channels, 27.095 MHz and 27.195 MHz these are no longer approved for use.

Operating CB devices on a channel that is not specified in the class licence is a breach of a licence condition, and makes you liable to prosecution.

Transmitter power levels

CB radio equipment must not exceed the maximum output power specified in the class licence. You are not permitted to attach any external devices, such as linear amplifiers, to CB radio equipment, for the purpose of increasing the power output of the transmitter. This type of operation is a breach of the licence conditions.

Interference management

A CB radio transmitter can cause interference to nearby television and radio receivers and other electronic equipment.

If you find that your CB radio is causing interference to a nearby radio or television receiver, there are a number of steps that you can take to minimise or eliminate the problem. The ACMA has produced information to assist you:

  1. Better television and radio reception – A PDF with general advice for people who are having trouble with television and radio reception.
  2. Broadcast reception affected by Amateur or CB radio transmission – provides assistance in resolving interference from these transmitters and includes an ACMA Policy Statement to promote understanding of the causes, resolution and avoidance of interference. This should be read in conjunction with the Better television and radio reception booklet.
  3. Some Methods for Eliminating Citizens Band Radio Transmissions from your Hi-Fi Stereo or Audio Equipment – helps determine why this type of interference may be occurring and steps you can take to resolve the problem.

CB and Amateur radio operators must be prepared to cooperate with any affected television viewers or radio listeners and take reasonable steps towards resolving interference problems.

Selective calling

Selective calling is a technique to receive calls from particular CB radios without having to listen to other users. Selective calling uses the transmission of audio tones that are recognisable to receivers fitted with a compatible decoder.

Some CB radios come fitted with a selective calling facility using Continuous Tone Coded Squelch System (CTCSS) techniques.

The use of CTCSS is only authorised on UHF CB bands. HF CB radios may only use SelCall.

Telemetry and telecommand

Telemetry is the process of obtaining measurements and relaying them at a distant point. Telecommand is the electronic remote control of equipment.

Examples include:

  1. monitoring water levels in dams
  2. controlling equipment such as irrigation pumps
  3. opening and closing gates.

The CBRS class licence authorises the use of telemetry and telecommand applications on UHF channels 22 and 23.

Compliance with standards

Devices operating under the class licence must comply with all relevant radiocommunications standards. ‘Standard’ in this context means a standard made under section 162 of the Radiocommunications Act 1992 (the Act).

Breaches of licence conditions

CB radio users must comply with all conditions in the class licence. Section 132(3) of the Act provides that:

‘Operation of a radiocommunications device is not authorised by a class licence if it is not in accordance with the conditions of the licence.’

If you breach any condition of the class licence (for example, operating on a frequency not mentioned in the class licence, or using an emergency channel for non-emergency purposes) you are no longer authorised under the class licence and may be liable for prosecution.

Uses not permitted

Other types of data operation, such as Packet Radio, are not permitted on CB bands.

Voice communications is not permitted on UHF CB channels 22 and 23.

Telemetry and telecommand is not permitted on any channel other than UHF CB channels 22 and 23.

Use of citizen band radio repeater stations

CB radio stations may operate through a CB repeater station in the UHF band.

UHF CB repeater stations are usually located at hilltop radiocommunication sites, and their frequencies are co-ordinated with the frequencies of other radiocommunications services to prevent interference. They must be covered by separate apparatus licences, not a class licence.

When operating in range of a repeater station, CB operators must only use the repeater’s assigned channels.

Channels 1 to 8 and 41 to 48 are designated as repeater output channels, and channels 31 to 38 and 71 to 78 are the corresponding designated repeater input channels. For example, a repeater that transmits on Channel 1 will always receive on Channel 31. When operated in duplex/repeater mode, the CB radio automatically selects corresponding transmit/receive frequencies.

Channels 5 and 35 must ONLY be used for emergency communications.

In locations where they are not being used by a repeater station, repeater channels may be used for single frequency communications.

As repeater stations are generally located at high sites, single frequency operation on repeater channels may interfere with the repeater station, even though the interfering station is located many kilometres from the repeater station. Communications through repeater stations are particularly susceptible to interference from single frequency operation on the repeater input channel.

Call signs

Learn about the class licence that authorises Citizen Band (CB) radio use.

Under the class licensing arrangements, call signs are not issued to individual users. However, the ACMA recommends that operators use some form of identification when transmitting.

Contacting other CB users

In the two CBRS bands, specific channels have been set aside for making initial contact with other CB users. Under the class licence, channel 11 (AM) (27.085 MHz) and channel 16 (SSB) (27.155 MHz) are the calling channels in the HF band and channel 11 (476.675 MHz) is the calling channel in the UHF band. The channels are only to be used for initial calling.

Once you have made initial contact with another CBRS operator, you should move to another channel to continue the contact. This leaves the call channel available for other CBRS operators to establish contact with each other.


In an emergency, any CB frequency may be used to attract attention.

There are specific channels in the two CB radio bands reserved only for emergency use. These are channel 9 (27.065 MHz) in the HF band and channels 5/35 (476.525/477.275 MHz) in the UHF band.

These channels are designated for emergency messages only and must not be used for other purposes.

Although the ACMA does not monitor these emergency channels, there are organisations that do so voluntarily. This monitoring is not full time, and is not Australia-wide. These organisations can assist in contacting the appropriate emergency service.

Connection to the telephone network

If you want to connect a CB radio station to a Public Telecommunications Network, you must do it in accordance with the Telecommunications Labelling (Customer Equipment and Customer Cabling) Notice 2001. For further information on this matter, please contact the ACMA’s Standards Section.

Recent changes

Changes to the Radiocommunications (Citizen Band Radio Stations) Class Licence 2002 came into force on 27 May 2011. These changes result from the making of theRadiocommunications (Citizen Band Radio Stations) Class Licence Variation 2011 (No. 1).

The Variation provides for additional channels in the UHF citizen band. Some of these additional channels are allocated as repeater channels. The variation relaxes the duty cycle restriction for telemetry and telecommand transmissions and permits the transmission of identification and position information. The variation clarifies the conditions applicable to ‘simplex’ use of repeater channels within range of repeater stations.

The linking of repeater stations and individual CB stations has been prohibited to minimise potential congestion and interference.


Leave a Reply