UHF & CB Radio Frequencies

CB & UHF Radio related frequencies & information.

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UHF & CB Radio Frequencies

Post by RF-Bot » Sun Jan 07, 2018 4:20 pm


UHF stands for Ultra High Frequency and operates in the 476/477MHz range in the Narrow FM mode. It is used for both personal and business usage. In Tasmania there are some businesses who use UHF on a daily basis for their operations. Personal use is also a big part of UHF CB radio in Tasmania and it's not uncommon to hear all age groups using it at one time or another, most noticeable is on weekends, though one must be warned of the sometimes bad language and carry on which can be heard on it, sometimes not suitable for family listening!

Recently the UHF CB band was expanded from 40 to 80 channels in 12.5KHz spacing's, although older 40 channel UHF radios can still be used, they will not have access to the new additional 40 channel allocations. UHF tends to be line of sight communication, however with the use of 'repeaters' the distance of transmissions can be greatly increased. A repeater is basically a combination of a radio receiver and a radio transmitter placed specifically in a high location, for example a large hill or mountain top, it then receives a signal and re-transmits it back out, so that the initial transmission can cover a much longer distance than normal.

CB refers to communications on 27MHz (11m) and is known as CBRS which stands for Citizens Band Radio Service. Although its popularity has decreased a lot since the '70s, it's still used by a lot of people and tends to peak in activity during the 11 year Solar Cycle, and it seems to have started to increase again in it's usage as of last year (2017). Modes used on 27MHz are AM (Amplitude Modulation), LSB (Lower Side Band) and USB (Upper Side Band), however you may occasionally hear some stations using FM which is not a legal mode of operation, at least not here in Australia, however some still tend to use it.

27MHz communications can be good for local or very long distance chatting and has been known to operate over vast distances, depending on the atmospheric conditions. Certain conditions can produce better and longer distance communication, and this is referred to as 'Skip' which allows stations from far away to be heard, including New Zealand, New Caledonia and in extreme cases even the USA. Some countries may have slightly different bands or step sizes, for example in New Zealand the CB band is on 26MHz, in the UK they have an additional 40 channels between 27.60125 and 27.99125 MHz, making 80 channels all up; whereas in Russia and Poland the channels are actually shifted down 5 KHz, for example, channel 30 is 27.300 MHz, not 27.305 MHz as it is here in Australia.



Legend: Frequency / Usage

UHF CB

1 - 476.4250 MHz - Repeater - Output
2 - 476.4500 MHz - Repeater - Output
3 - 476.4750 MHz - Repeater - Output
4 - 476.5000 MHz - Repeater - Output
5 - 476.5250 MHz - Repeater - Output (Emergency Use Only)
6 - 476.5500 MHz - Repeater - Output
7 - 476.5750 MHz - Repeater - Output
8 - 476.6000 MHz - Repeater - Output
9 - 476.6250 MHz - General Chat Channel
10 - 476.6500 MHz - General Chat Channel
11 - 476.6750 MHz - Call Channel
12 - 476.7000 MHz - General Chat Channel
13 - 476.7250 MHz - General Chat Channel
14 - 476.7500 MHz - General Chat Channel
15 - 476.7750 MHz - General Chat Channel
16 - 476.8000 MHz - General Chat Channel
17 - 476.8200 MHz - General Chat Channel
18 - 476.8500 MHz - General Chat Channel
19 - 476.8750 MHz - General Chat Channel
20 - 476.9000 MHz - General Chat Channel
21 - 476.9250 MHz - General Chat Channel
22 - 476.9500 MHz - Data Only - No Voice / Packet
23 - 476.9750 MHz - Data Only - No Voice / Packet
24 - 477.0000 MHz - General Chat Channel
25 - 477.0250 MHz - General Chat Channel
26 - 477.0500 MHz - General Chat Channel
27 - 477.0750 MHz - General Chat Channel
28 - 477.1000 MHz - General Chat Channel
29 - 477.1250 MHz - Road Channel between Sydney & Brisbane
30 - 477.1500 MHz - General Chat Channel
31 - 477.1750 MHz - Repeater - Input
32 - 477.2000 MHz - Repeater - Input
33 - 477.2250 MHz - Repeater - Input
34 - 477.2500 MHz - Repeater - Input
35 - 477.2750 MHz - Repeater - Input (Emergency Use Only)
36 - 477.3000 MHz - Repeater - Input
37 - 477.3250 MHz - Repeater - Input
38 - 477.3500 MHz - Repeater - Input
39 - 477.3750 MHz - General Chat Channel
40 - 477.4000 MHz - Road Channel Australia Wide
41 - 476.4375 MHz - Repeater - Output
42 - 476.4625 MHz - Repeater - Output
43 - 476.4875 MHz - Repeater - Output
44 - 476.5125 MHz - Repeater - Output
45 - 476.5375 MHz - Repeater - Output
46 - 476.5625 MHz - Repeater - Output
47 - 476.5875 MHz - Repeater - Output
48 - 476.6125 MHz - Repeater - Output
49 - 476.6375 MHz - General Chat Channel
50 - 476.6625 MHz - General Chat Channel
51 - 476.6875 MHz - General Chat Channel
52 - 476.7125 MHz - General Chat Channel
53 - 476.7375 MHz - General Chat Channel
54 - 476.7625 MHz - General Chat Channel
55 - 476.7875 MHz - General Chat Channel
56 - 476.8125 MHz - General Chat Channel
57 - 476.8375 MHz - General Chat Channel
58 - 476.8625 MHz - General Chat Channel
59 - 476.8875 MHz - General Chat Channel
60 - 476.9125 MHz - General Chat Channel
61 - RESERVED For Future Expansion
62 - RESERVED For Future Expansion
63 - RESERVED For Future Expansion

64 - 477.0125 MHz - General Chat Channel
65 - 477.0375 MHz - General Chat Channel
66 - 477.0625 MHz - General Chat Channel
67 - 477.0875 MHz - General Chat Channel
68 - 477.1125 MHz - General Chat Channel
69 - 477.1375 MHz - General Chat Channel
70 - 477.1625 MHz - General Chat Channel
71 - 477.1875 MHz - Repeater - Input
72 - 477.2125 MHz - Repeater - Input
73 - 477.2375 MHz - Repeater - Input
74 - 477.2625 MHz - Repeater - Input
75 - 477.2875 MHz - Repeater - Input
76 - 477.3125 MHz - Repeater - Input
77 - 477.3375 MHz - Repeater - Input
78 - 477.3625 MHz - Repeater - Input
79 - 477.3875 MHz - General Chat Channel
80 - 477.4125 MHz - General Chat Channel




27MHz Citizens Band Radio Service

1 - 26.965 MHz
2 - 26.975 MHz
3 - 26.985 MHz
4 - 27.005 MHz
5 - 27.015 MHz
6 - 27.025 MHz
7 - 27.035 MHz
8 - 27.055 MHz - Truckie Chat Channel
9 - 27.065 MHz (Emergency Use Only)
10 - 27.075 MHz - Used by 4WDrivers
11 - 27.085 MHz - AM Call Only
12 - 27.105 MHz
13 - 27.115 MHz
14 - 27.125 MHz
15 - 27.135 MHz
16 - 27.155 MHz - LSB Call Only
17 - 27.165 MHz
18 - 27.175 MHz
19 - 27.185 MHz
20 - 27.205 MHz
21 - 27.215 MHz
22 - 27.225 MHz
23 - 27.255 MHz
24 - 27.235 MHz
25 - 27.245 MHz
26 - 27.265 MHz
27 - 27.275 MHz
28 - 27.285 MHz
29 - 27.295 MHz
30 - 27.305 MHz
31 - 27.315 MHz
32 - 27.325 MHz
33 - 27.335 MHz
34 - 27.345 MHz
35 - 27.355 MHz - Unofficial LSB Call
36 - 27.365 MHz
37 - 27.375 MHz
38 - 27.385 MHz
39 - 27.395 MHz
40 - 27.405 MHz


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