A New Standard
The ACMA (Australian Communications and Media Authority) reviewed the arrangements for the UHF CB band. As a result the ACMA decided to restructure the UHF CB band, increasing its capacity from 40 up to 80 channels – with 75 for voice communications and 2 for telemetry totalling 77 useable channels (the remaining 3 channels are restricted for possible future use).
Users will soon see the terms 'Wideband' and 'Narrowband' being used to describe older radios and newer radios. Older radios that operate on only 40 UHF-CB channels are Wideband radios and newer radios that will operate on the 77 UHF-CB channels are Narrowband radios. Both Narrowband radios and Wideband radios can communicate together normally as always on the first 40 channels. Only the new Narrowband radios will have the additional channels up to channel 80.
A Summary of Special Channel Usage in the 80 Channels
• Channels 22 and 23 are reserved for telemetry and telecommand. Voice transmission is prohibited on these channels.
• Channel 61, 62 and 63 are restricted for possible future use. Uniden radios can be user upgraded to use these channels should the ACMA legalise their use.
• There are 16 Duplex channels 1 to 8 (31 to 38) and 41 to 48 (71 to 78).
• Channel 5 (+Duplex 35) remains the emergency channel.Unlocking the Uniden UH076SX-NB UHF CB radio
Turn on the power by turning the power knob clockwise
Press the channel up button until it reads channel 39 and wait 3 seconds
Turn the power off by turning the power knob anti-clockwise and wait 4 seconds
While holding down the (TXP) & (MON) buttons, Turn the power knob clockwise to turn the power on
Check the channel range to see if channels 41 to 80 appear
If channels 41 to 80 fail to appear repeat steps 1-5
Unlock the Uniden UH7700 NB Link
Unlock the Uniden UH7760 NB link
Unlocking the Uniden UH078SX-NB UHF CB radio
Turn on the power by turning the power knob clockwise
Press the channel up button until it reads channel 39 and wait 3 seconds
Turn the power off by turning the power knob anti-clockwise and wait 4 seconds
While holding down the (TXP) & (CALL) buttons, Turn the power knob clockwise to turn the power on
Check the channel range to see if channels 41 to 80 appear
If channels 41 to 80 fail to appear repeat steps 1-5
Unlocking the Uniden UH710SX-NB / UH720SX-NB UHF CB radios
Turn on the power by turning the power knob clockwise
Press the channel up button until it reads channel 39 and wait 3 seconds
Turn the power off by turning the power knob anti-clockwise and wait 4 seconds
While holding down the (TXP) & (SCAN) buttons, Turn the power knob clockwise to turn the power on
Check the channel range to see if channels 41 to 80 appear
If channels 41 to 80 fail to appear repeat steps 1-5
Unlocking GME UHF CB radios
Dealer Upgradable Radios
The following models of radio are dealer upgradable when containing the correct serial number prefix
Radio Model Number -TX3200, TX3420, TX3440
Serial Number Prefix 012, 101, 102, 103, 104, 105
User Upgradable Radios
The following Models of radio are user upgradable when containing the correct serial number prefix
Radio Model Number -TX3100, TX3340, TX3500, TX3510, TX3520, TX3540, TX4400, TX4600*
Serial Number Prefix - 012, 101, 102*, 103*, 104*, 105*, 106*
*Serial number prefixes apply to the TX4600 only
GME UHF CB user upgrade instructions
Select Channel 7
Switch the radio 'Off' then 'ON' again
Select Channel 23
Switch the radio 'Off' then 'ON' again
Select Channel 39
Switch the radio 'Off' then 'ON' again
Select Channel 15
Switch the radio 'Off' then 'ON' again
Select Channel 31
Switch the radio 'Off' then 'ON' again
Unit should display channel 80 if successful, if unsuccessful try again from step one
Icom IC41s / Icom IC400Pro UHF CB radio
The Icom 400Pro and IC41s is 80 Channel Upgradeable by Dealer Only
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