UK PMR 446 FREQUENCIES (AKA UHF CB)

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UK PMR 446 FREQUENCIES (AKA UHF CB)

Postby DX Jim » Tue Feb 12, 2013 1:08 pm

PMR 446 FREQUENCIES (AKA UK UHF CB)

I thought here would be a good place to list all the 446 channels, frequencies and variations

There are three sets of frequencies in use in the uk the main on is the 8 channels for analogue from 446.00625 to 446.09375, there are also 16 channels for digital 446 from 446.103125 to 446.196875 and an unofficial UK UHF CB set of 16 channels as set out in the tables below

Analogue PMR uses eight FM channels separated by 12.5 kHz from each other. Per regulation, maximum power, like FRS, is 500 mW ERP and equipment must be used on a mobile basis. CTCSS is usually used, with more upmarket models also featuring DCS.

Image

MAIN PMR 446 FREQUENCIES ANALOGUE
PMR Channel - Frequency (MHz)
1 446.00625
2 446.01875
3 446.03125
4 446.04375
5 446.05625
6 446.06875
7 446.08125
8 446.09375


Digital FDMA

Digital dPMR446 uses sixteen digital voice channels separated by 6.25 kHz from each other with 4-Level FSK modulation at 3.6 kbit/s.

Image

dPMR 446 FREQUENCIES DIGITAL
dPMR446 Channel Frequency (MHz)
01 446.103125
02 446.109375
03 446.115625
04 446.121875
05 446.128125
06 446.134375
07 446.140625
08 446.146875
09 446.153125
10 446.159375
11 446.165625
12 446.171875
13 446.178125
14 446.184375
15 446.190625
16 446.196875

Digital TDMA
Digital DMR Tier I uses eight digital voice channels separated by 12.5 kHz from each other with 4-Level FSK modulation at 3.6 kbit/s.

DMR 446 FREQUENCIES DIGITAL
DMR Tier I Channel Frequency (MHz)
1 446.10625
2 446.11875
3 446.13125
4 446.14375
5 446.15625
6 446.16875
7 446.18125
8 446.19375


There are also a set of unnoficial channels known as UHF CB which are

UNNOFICIAL UHF CB

UHF CB CHANNELS
UHF CB Channel 01 446.00625 MHz
UHF CB Channel 02 446.01875 MHz
UHF CB Channel 03 446.03125 MHz
UHF CB Channel 04 446.04375 MHz
UHF CB Channel 05 446.05625 MHz
UHF CB Channel 06 446.06875 MHz
UHF CB Channel 07 446.08125 MHz
UHF CB Channel 08 446.09375 MHz
UHF CB Channel 09 446.10625 MHz
UHF CB Channel 10 446.11875 MHz
UHF CB Channel 11 446.13125 MHz
UHF CB Channel 12 446.14375 MHz
UHF CB Channel 13 446.15625 MHz
UHF CB Channel 14 446.16875 MHz
UHF CB Channel 15 446.18125 MHz
UHF CB Channel 16 446.19375 MHz

All 446 frequencies are 12.5k but with an 6.25 step so if your radio or scanner only supports 12.5 and 5 steps but not 6.25 then the closest you can get using 5khz steps is as below

PMR Main 8 Channel 446 frequencies using 5khz step
1 446.005
2 446.020
3 446.030
4 446.045
5 446.055
6 446.070
7 446.080
8 446.095

:geek:
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Re: UK PMR 446 FREQUENCIES (AKA UHF CB)

Postby M3ZZN » Sat Apr 06, 2013 11:24 am

well those freqs you say are "uhf cb" is just pmr 446 there is no such thing as uhf cb in the uk its just called pmr 446 cb is 27mhz thats it
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Re: UK PMR 446 FREQUENCIES (AKA UHF CB)

Postby francis211 » Mon Apr 08, 2013 9:26 pm

M3ZZN wrote:well those freqs you say are "uhf cb" is just pmr 446 there is no such thing as uhf cb in the uk its just called pmr 446 cb is 27mhz thats it


I disagreed there as some DXers use the "UNNOFICIAL UHF CB" as normal PMR446 get very busy in some towns, Just wish ofcom comes with some PMR446 VHF :P
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Re: UK PMR 446 FREQUENCIES (AKA UHF CB)

Postby francis211 » Mon Apr 08, 2013 9:34 pm

DX Jim wrote:PMR 446 FREQUENCIES (AKA UK UHF CB)
UNNOFICIAL UHF CB

UHF CB CHANNELS
UHF CB Channel 01 446.00625 MHz
UHF CB Channel 02 446.01875 MHz
UHF CB Channel 03 446.03125 MHz
UHF CB Channel 04 446.04375 MHz
UHF CB Channel 05 446.05625 MHz
UHF CB Channel 06 446.06875 MHz
UHF CB Channel 07 446.08125 MHz
UHF CB Channel 08 446.09375 MHz
UHF CB Channel 09 446.10625 MHz
UHF CB Channel 10 446.11875 MHz
UHF CB Channel 11 446.13125 MHz
UHF CB Channel 12 446.14375 MHz
UHF CB Channel 13 446.15625 MHz
UHF CB Channel 14 446.16875 MHz
UHF CB Channel 15 446.18125 MHz
UHF CB Channel 16 446.19375 MHz

All 446 frequencies are 12.5k but with an 6.25 step so if your radio or scanner only supports 12.5 and 5 steps but not 6.25 then the closest you can get using 5khz steps is as below


Dont forget the "binatone hidden channel 9" on 447.050 MHz

francis211 wrote:
M3ZZN wrote:well those freqs you say are "uhf cb" is just pmr 446 there is no such thing as uhf cb in the uk its just called pmr 446 cb is 27mhz thats it


I disagreed there as some DXers use the "UNNOFICIAL UHF CB" as normal PMR446 get very busy in some towns, Just wish ofcom comes with some PMR446 VHF :P
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Re: UK PMR 446 FREQUENCIES (AKA UHF CB)

Postby JohnUK » Mon Apr 08, 2013 10:26 pm

M3ZZN wrote:well those freqs you say are "uhf cb" is just pmr 446 there is no such thing as uhf cb in the uk its just called pmr 446 cb is 27mhz thats it

He is actually correct in his listing as there is an unofficial but widely recognised pirate UHF CB band on 446 and that is the channel plan that he has posted. it isnt an ofcom arranged thing its a people thing :wink:
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UK PMR 446 CTCSS TONES PRIVACY CODES SUB CHANNELS

Postby Staffs Paul » Thu Jun 27, 2013 7:32 pm

Also here are the standard 38 CTCSS tones/codes also known as privacy codes/sub channels found on most commercial 446 units

Image

:walkietalkie:
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Re: UK PMR 446 FREQUENCIES (AKA UHF CB)

Postby Marcus2013 » Thu Nov 07, 2013 5:18 pm

Help!!!

Can anyone tell me if Baofeng BF-888S VHF/UHF transceiver 400-470MHz hand helds are classed as PMR446.

Unfortunately I'm not an expert in these matters! All I know is that they have 16 channels and they suit my needs down to the ground!

So if anyone out there can help me then I would be very grateful!.
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Re: UK PMR 446 FREQUENCIES (AKA UHF CB)

Postby SilverShadow » Thu Nov 07, 2013 7:29 pm

Hi Marcus2013 and welcome to the forum :wave:

Your Baofeng is not classed as a PMR 446 radio but it can be used as one as it covers the frequency range and steps, it will need to be set to 6.25 steps at Narrow FM using the 8 analogue frequencies above.

The reason it differs from a PMR 446 radio is PMR 446 is limited to half a watt (500mw) with a fixed antenna and limited to the 446MHz (and in some cases 430MHz LPD) frequencies not wide range like the BF, although that doesn't stop most people using Baofengs on 446 which is fairly commonplace.
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Re: UK PMR 446 FREQUENCIES (AKA UHF CB)

Postby Mark5R » Mon Nov 11, 2013 12:51 pm

Can anyone advise me as to why with 3 different good scanners I still cant get the reception as good as I get on my cheap baofeng even when I use a long telescopic antenna on the scanners? I also get 446 channels coming through on 467 frequencies too on 2 scanners but not the other scanner or the baofeng?
Baofeng UV-5R ~ Baofeng UV-3R+
GRE PSR-225 ~ Uniden Bearcat BCT-15X
Cobra 29LTD ~ Cobra MT115
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Re: UK PMR 446 FREQUENCIES (AKA UHF CB)

Postby m0lsx » Mon Nov 11, 2013 1:11 pm

Because the scanner is a jack of all trades, as is the antenna..
Look at this way, would you expect a 4X4 like a Porsche Cayenne to perform as well off road as a vehicle designed or modified to perform only there???
73 De Alan (M0LSX.)
http://www.qrz.com/db/M0LSX"
To save typing it over & over again..The above post has probably been edited because I made a mistake...I normally do....
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