Weather Data Source: Sharp Weather
 
Old 40
Channel,
Channel
Number
New 80
Channel,
Channel
Number
Frequency
MHz
Channel Purpose / Use
Channel
Spacing KHz
1
1
476.4250
Duplex - Repeater Output
25 KHz
2
2
476.4500
Duplex - Repeater Output
  25 KHz
3
3
476.4750
Duplex - Repeater Output
25 KHz
4
4
476.5000
Duplex - Repeater Output
25 KHz
5
5
476.5250
Duplex - Repeater Output (Emergency Channel. EMERGENCY USE
ONLY)
25 KHz
6
6
476.5500
Duplex - Repeater Output
25 KHz
7
7
476.5750
Duplex - Repeater Output
25 KHz
8
8
476.6000
Duplex - Repeater Output
25 KHz
9
9
476.6250
Simplex
25 KHz
10
10
476.6500
Simplex -  4WD Drivers - Convoy, Clubs & National Parks
25 KHz
11
11
476.6750
Simplex - Call Channel
25 KHz
12
12
476.7000
Simplex
25 KHz
13
13
476.7250
Simplex
25 KHz
14
14
476.7500
Simplex
25 KHz
15
15
476.7750
Simplex
25 KHz
16
16
476.8000
Simplex
25 KHz
17
17
476.8250
Simplex
25 KHz
18
18
476.8500
Simplex - Caravan, Campers Convoy Channel
25 KHz
19
19
476.8750
Simplex
25 KHz
20
20
476.9000
Simplex
25 KHz
21
21
476.9250
Simplex
25 KHz
22
22
476.9500
Data Only ( No Voice- No Packet )
25 KHz
23
23
476.9750
Data Only ( No Voice- No Packet )
25 KHz
24
24
477.0000
Simplex
25 KHz
25
25
477.0250
Simplex
25 KHz
26
26
477.0500
Simplex
25 KHz
27
27
477.0750
Simplex
25 KHz
28
28
477.1000
Simplex
25 KHz
29
29
477.1250
Simplex  Pacific Hwy (N.S.W) and Bruce Hwy (Q.L.D) Highway Channel
25 KHz
30
30
477.1500
Simplex UHF CB - Safety Alerts, Weather and Disaster Warning
Broadcasts (EWN- Early Warning Network)
25 KHz
31
31
477.1750
Repeater Input
25 KHz
32
32
477.2000
Repeater Input
25 KHz
33
33
477.2250
Repeater Input
25 KHz
34
34
477.2500
Repeater Input
25 KHz
35
35
477.2750
Duplex - Repeater Output (Emergency Channel. EMERGENCY USE
ONLY)
25 KHz
36
36
477.3000
Repeater Input
25 KHz
37
37
477.3250
Repeater Input
25 KHz
38
38
477.3500
Repeater Input
25 KHz
39
39
477.3750
Simplex
25 KHz
40
40
477.4000
Simplex - Highway Channel
25 KHz
 
41
476.4375
Duplex - Repeater Output
962.5 KHz
 
42
476.4625
Duplex - Repeater Output
25 KHz
 
43
476.4875
Duplex - Repeater Output
25 KHz
 
44
476.5125
Duplex - Repeater Output
25 KHz
 
45
476.5375
Duplex - Repeater Output
25 KHz
 
46
476.5625
Duplex - Repeater Output
25 KHz
 
47
476.5875
Duplex - Repeater Output
25 KHz
 
48
476.6125
Duplex - Repeater Output
25 KHz
 
49
476.6375
Simplex
25 KHz
 
50
476.6625
Simplex
25 KHz
 
51
476.6875
Simplex
25 KHz
 
52
476.7125
Simplex
25 KHz
 
53
476.7375
Simplex
25 KHz
 
54
476.7625
Simplex
25 KHz
 
55
476.7875
Simplex
25 KHz
 
56
476.8125
Simplex
25 KHz
 
57
476.8375
Simplex
25 KHz
 
58
476.8625
Simplex
25 KHz
 
59
476.8875
Simplex
25 KHz
 
60
476.9125
Simplex
25 KHz
 
61
 
Reserved for Future Expansion
 
 
62
 
Reserved for Future Expansion
 
 
63
 
Reserved for Future Expansion
 
 
64
477.0125
Simplex
100 KHz
 
65
477.0375
Simplex
25 KHz
 
66
477.0625
Simplex
25 KHz
 
67
477.0875
Simplex
25 KHz
 
68
477.1125
Simplex
25 KHz
 
69
477.1375
Simplex
25 KHz
 
70
477.1625
Simplex
25 KHz
 
71
477.1875
Repeater Input
25 KHz
 
72
477.2125
Repeater Input
25 KHz
 
73
477.2375
Repeater Input
25 KHz
 
74
477.2625
Repeater Input
25 KHz
 
75
477.2875
Repeater Input
25 KHz
 
76
477.3125
Repeater Input
25 KHz
 
77
477.3375
Repeater Input
25 KHz
 
78
477.3625
Repeater Input
25 KHz
 
79
477.3875
Simplex
25 KHz
 
80
477.4125
Simplex
25 KHz
UHF Radio
UHF Radio Frequencies (Australia, New Zealand)
12.5 KHz
12.5 KHz
 
 
 
 
The frequency chart below is for UHF (Ultra High Frequency) CB Radio covering 476/477MHz frequency
range.
For decades UHF CB Radio has had 40 channels allocated for use. In 2011 the ACMA have now authorised
an extra 40 channels for use. With the introduction of the extra 40 channels, UHF CB Radio now has 80
channels allocated.
Out of these 80 channels, there are a few channels that cannot be used for voice transmission, they are for
data and telemetry transmissions, 2 of which are Emergency Channels, which cannot be used for general
chat and a few channels that cannot be used yet, as they haven’t been activated for use yet.
This chart includes the original 40 channel allocations that existed before the introduction of the extra 40
channels. It also includes the extra 40 new channels too.
If you observe the spacing of the channels in KHz and the frequency list, you will notice that on almost every
channel, mathematically they are spaced at 25 KHz apart. This was the previous original 40 channel
spacing.
In 2011, UHF CB Radio had extra 40 channels authorised to be added to the radio band. If you observe
channels 40 and 41, you will note that channel 40 is frequency number 477.4000 and channel 41 is
frequency number 476.4375. This in fact is a frequency drop down 962.5 KHz. This aligns channel 41 in
between channels 1 and 2. Channel 42 is slotted in between channel 2 and 3, the rest of the extra new
channels to the UHF Radio Band follows the same pattern between the original 40 channels, they are slotted
in between all of the original allocated 40 channels.
Sequentially by channel number, the channels are 25 KHz apart, however channels 41 through to channel
80's frequency numbers are slotted in between channel 1 to 40, now making all channels separated 12.5
KHz apart.
For a clearer illustration of the frequency separation between all of the allocated channels, I have made
another frequency chart showing the Sorted order of channels versus frequency number; it also reflects
today’s new 12.5 KHz spacing between channels.
The original UHF Frequencies were 25 KHz apart, called wide band, the new allocations are now of a narrow
band spacing of 12.5 KHz spacing.
For a clearer and easier view of the relationship of where channel numbers, frequency numbers and KHz
spacing between channels, go to Sorted.
With thanks to Larry 071, Frankston, Victoria, Australia and a big hello to George from Carrum, Victoria. They
both are very friendly and helpful UHF CB Radio enthusiasts, that I have had the pleasure to befriend. You too
could get to know them.