General notes to the Band Plan
ITU-R Recommendation SM.328 (extract)
Necessary bandwidth: For a given class of emission, the width of the frequency band which is just sufficient to ensure the transmission of information at the rate and with the quality required under specified conditions.
The use of Amplitude Modulation (AM) is acceptable in the all modes segments but users are asked to consider adjacent channel activity when selecting operating frequencies.
Foundation and Intermediate Licence holders are advised to check their licences for the permitted power limits and conditions applicable to their class of licence.
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6m (50 MHz)
Frequency | Bandwidth | Preferred Modes and Usage |
---|---|---|
50.000 – 50.100 MHz | 500 Hz | CW Only (except for Beacon Project – Note 2) 50.050 MHz: Future International Centre of Activity 50.090 MHz: Intercontinental DX Centre of Activity (Note 1) |
50.100 – 50.200 MHz | 2.7 KHz | SSB/CW – International Preferred 50.100-50.130 MHz: Intercontinental DX CW & SSB (Note 1) 50.110 MHz: Intercontinental DX Centre of Activity 50.130-50.200 MHz: General International CW & SSB 50.150 MHz: International Centre of Activity |
50.200 – 50.300 MHz | 2.7 KHz | SSB/CW – General Usage 50.285 MHz: Crossband Centre of Activity |
50.300 – 50.400 MHz | 2.7 KHz | MGM/Narrowband/CW 50.305 MHz: PSK Centre of Activity 50.310-50.320 MHz: EME (Earth Moon Earth) 50.320-50.380 MHz: MS (Meteor Scatter) |
50.400 – 50.500 MHz | Propagation Beacons Only | |
50.500 – 52.000 MHz | 12.5 KHz | All Modes 50.510 MHz: SSTV (AFSK) 50.520 MHz: Internet voice gateway (10 kHz channels), (IARU common channel) 50.530 MHz: Internet voice gateway (10 kHz channels), (IARU common channel) 50.540 MHz: Internet voice gateway (10 kHz channels), (IARU common channel) 50.550 MHz: Image/Fax working frequency 50.600 MHz: RTTY (FSK) 50.620-50.750 MHz: Digital communications 50.630 MHz: Digital Voice (DV) calling 50.710-50.890 MHz: FM/DV Repeater Outputs (10 kHz channel spacing) 51.210-51.390 MHz: FM/DV Repeater Inputs (10 KHz channel spacing) (Note 4) 51.410-51.590 MHz: FM/DV Simplex (Note 3) (Note 4) 51.510 MHz: FM calling frequency 51.530 MHz: GB2RS news broadcast and slow CW 51.650 & 51.750 MHz: See Note 5 (25kHz aligned) 51.770 & 51.790 MHz: See Note 5 51.810-51.990 MHz: FM/DV Repeater Outputs (IARU aligned channels) |
Notes
- Only to be used between stations in different continents (not for intra-European QSOs)
- 50.0-50.1MHz is currently shared with Propagation Beacons. These are due to be migrated by Aug-2014 to 50.4-50.5 MHz, to create more space for CW and a new Synchronised Beacon Project
- 20 kHz channel spacing. Channel centre frequencies start at 51.430 MHz
- Embedded data traffic is allowed with digital voice (DV)
- May be used for Emergency Communications and Community Events
- 51.0-52.0 MHz Available on the basis on non-interference to other services (inside or outside the UK)
4m (70 MHz)
Frequency | Bandwidth | Preferred Modes and Usage |
---|---|---|
70.000 – 70.090 MHz | 1 KHz | Propagation Beacons only |
70.090 – 70.100 MHz | 1 KHz | Personal Beacons |
70.100 – 70.250 MHz | 2.7 KHz | Narrow Band modes 70.185 MHz: Cross-band activity centre 70.200 MHz: CW/SSB calling 70.250 MHz: MS (Meteor Scatter) calling |
70.250 – 70.294 MHz | 12 KHz | All Modes 70.260 MHz: AM/FM calling 70.270 MHz: MGM centre of activity |
70.294 – 70.500 MHz | 12 KHz | All modes channelised operations using 12.5 kHz spacing 70.3125 MHz: Digital modes 70.3250 MHz: DX Cluster 70.3375 MHz: Digital modes 70.3500 MHz: Internet voice gateway (Note 2) 70.3625 MHz: Internet voice gateway 70.3750 MHz: See Note 2 70.3875 MHz: Internet voice gateway 70.4000 MHz: See Note 2 70.4125 MHz: Internet voice gateway 70.4250 MHz: FM simplex – used by GB2RS news broadcast 70.4375 MHz: Digital modes (special projects) 70.4500 MHz: FM calling 70.4625 MHz: Digital modes 70.4875 MHz: Digital modes |
Notes
- Usage by operators in other countries may be influenced by restrictions in their national allocations
- May be used for Emergency Communications and Community Events
- 160W Maximum Power – Available on the basis of non-interference to other services (inside or outside the UK)
2m (144 MHz)
Frequency | Bandwidth | Preferred Modes and Usage |
---|---|---|
144.000 – 144.025 MHz | 2.7 KHz | All modes – including Satellite downlinks |
144.025 – 144.110 MHz | 500 Hz | CW (including EME CW) 144.050 MHz: CW Centre of Activity 144.100 MHz: Random MS telegraphy calling (Note 1) |
144.110 – 144.150 MHz | 500 Hz | CW and MGM 144.138 MHz: PSK31 centre of activity EME MGM activity (Note 7) |
144.150 – 144.180 MHz | 2.7 KHz | CW, MGM and SSB |
144.180 – 144.360 MHz | 2.7 KHz | CW and SSB 144.175 MHz: Microwave talk-back 144.195-144.205 MHz: Random MS SSB 144.200 MHz: Random MS SSB calling frequency 144.250 MHz: GB2RS news broadcast and slow Morse 144.260 MHz: USB. (Note 10) 144.300 MHz: SSB Centre of Activity |
144.360 – 144.399 MHz | 2.7 KHz | CW, MGM, SSB 144.370 MHz: MGM calling frequency |
144.400 – 144.490 MHz | Propagation Beacons only | |
144.490 – 144.500 MHz | Beacon guard band | |
144.500 – 144.794 MHz | 20 KHz | All Modes (Note-8) 144.500 MHz: Image Modes centre (SSTV, Fax etc) 144.600 MHz: Data Centre of Activity (MGM, RTTY etc) 144.6125 MHz: UK Digital Voice (DV) calling (Note 9) 144.625-144.675 MHz: See Note 10 144.750 MHz: ATV Talk-back 144.775-144.794 MHz: See Note 10 |
144.794 – 144.990 MHz | 12 KHz | MGM / Digital Communications 144.800-144.9875 MHz: Digital modes (including unattended) 144.8000 MHz: Unconnected nets – APRS, UiView etc (Note 13) 144.8125 MHz: DV Internet voice gateway (IARU common channel) 144.8250 MHz: DV Internet voice gateway (IARU common channel) 144.8375 MHz: DV Internet voice gateway (IARU common channel) 144.8500 MHz: DV Internet voice gateway (IARU common channel) 144.8625 MHz: DV Internet voice gateway (IARU common channel) 144.9250 MHz: TCP/IP usage 144.9375 MHz: AX25 usage 144.9500 MHz: AX25 usage 144.9625 MHz: FM Internet voice gateway 144.9750, 144.9875 MHz: tbd (Note 11) |
144.990 – 145.1935 MHz | 12 KHz | FM/DV: RV48 – RV63 Repeater input exclusive (Note 2) (Note 5) |
145.200 MHz | 12 KHz | FM/DV: Space communications (e.g. I.S.S.) – Earth-to-Space 145.2000 MHz: (Notes 4 & 10) |
145.200 – 145.5935 MHz | 12 KHz | FM/DV V16-V48 FM/DV simplex (Notes 3, 5 & 6) 145.2250 MHz: See Note 10 145.2375 MHz: FM Internet voice gateway (IARU common channel) 145.2500 MHz: Used for slow Morse transmissions 145.2875 MHz: FM Internet voice gateway (IARU common channel) 145.3375 MHz: FM Internet voice gateway (IARU common channel) 145.5000 MHz: FM calling (Note 12) 145.5250 MHz: Used for GB2RS news broadcast 145.5500 MHz: Used for rally/exhibition talk-in 145.5750, 145.5875 MHz (Note 11) |
145.5935 – 145.7935 MHz | 12 KHz | FM/DV: RV48 – RV63 Repeater output (Note 2) |
145.800 MHz | 12 KHz | FM/DV: Space communications (e.g. I.S.S.) – Space-Earth |
145.806 – 146.000 MHz | 12 KHz | All Modes – Satellite exclusive |
Notes
- Meteor scatter operation can take place up to 26kHz higher than the reference frequency
- 12.5kHz channels numbered RV48-RV63. RV48 input = 145.000 MHz, output=145.600 MHz
- 12.5kHz simplex channels numbered V16-V46. V16=145.200 MHz
- Emergency Communications Groups utilising this frequency should take steps to avoid interference to ISS operations in non-emergency situations
- Embedded data traffic is allowed with digital voice (DV)
- Simplex use only – no DV gateways
- EME activity using MGM is commonly practiced between 144.110-144.160 MHz
- Amplitude Modulation (AM) is acceptable within the All Modes segment. AM usage is typically found on 144.550MHz. Users should consider adjacent channel activity when selecting operating frequencies
- In other countries IARU Region-1 recommend 145.375 MHz
- May be used for Emergency Communications and Community Events
- May be used for repeaters in other IARU Region-1 countries
- DV users are asked not to use this channel, and use 144.6125 MHz for calling
- 144.800 use should be NBFM to avoid interference to 144.8125 DV Gateways
70cm (430 MHz)
Frequency | Bandwidth | Preferred Modes and Usage |
---|---|---|
430.000 – 431.981 MHz | 20 KHz | All modes 430.0125-430.0750 MHz: FM Internet voice gateways (Notes 4 & 5) |
430.400 – 430.575 MHz | Digital links 430.400-430.775 MHz: UK DV 9 MHz split repeaters – Inputs | |
430.600 – 430.925 MHz | Digital repeaters 430.8000 MHz: 7.6 MHz Talkthrough (Note 6) 430.8250-430.9750 MHz: RU66-RU78 7.6 MHz split repeaters – outputs 430.9900-431.9000 MHz: Digital Communications 431.0750-431.1750 MHz: DV Internet voice gateways (Note 8) | |
432.000 – 432.100 MHz | 500 Hz | CW/MGM 432.0000-432.0250 MHz: Moonbounce (EME) 432.0500 MHz: CW centre of activity 432.0880 MHz: PSK31 centre of activity |
432.100 – 432.400 MHz | 2.7 KHz | CW, SSB, MGM 432.2000 MHz: SSB centre of activity 432.3500 MHz: Microwave talkback (Europe) 432.3700 MHz FSK441 calling frequency |
432.400 – 432.500 MHz | 500 Hz | Propagation Beacons only |
432.500 – 432.994 MHz | 25 KHz (Note 7) | All modes 432.5000 MHz: Narrow band SSTV activity centre 432.6250-432.6750 MHz: Digital communications (25 kHz channels) 432.7750 MHz: 1.6 MHz Talkthrough – Base TX (Note 6) |
432.994 – 433.381 MHz | 25 KHz (Note 7) | FM repeater outputs 433.0000-433.3750 MHz (RB0-RB15) RU240-RU270 FM/DV repeater outputs (25 kHz channels) in UK only (Note 1) |
433.394 – 433.581 MHz | 25 KHz (Note 7) | FM/DV simplex channels 433.4000 MHz: U272 – IARU Region 1 SSTV (FM/AFSK) 433.4250 MHz: U274 433.4500 MHz: U276 (Note 3) 433.4750 MHz: U278 433.5000 MHz: U280 – FM Calling channel 433.5250 MHz: U282 433.5500 MHz: U284 – Used for Rally/Exhibition talk-in 433.5750 MHz: U286 |
433.600 – 434.000 MHz | 25 KHz (Note 7) | All modes 433.625-675 MHz: Digital communications (25 kHz channels) 433.700 MHz: (Note 6) 433.725-433.775 MHz:(Note 6) 433.800-434.250 MHz: Digital communications 433.800 MHz for APRS where 144.800 MHz cannot be used |
434.000 – 434.594 MHz | 25 KHz (Note 7) | 433.950-434.050 MHz: Internet voice gateways (Note 8) 434.375 MHz: 1.6 MHz Talkthrough – Mobile TX (Note 6) 434.475 – 434.525 MHz: Internet voice gateways (Note 8) |
434.594 – 434.981 MHz | 25 KHz (Note 7) | FM/DV repeater inputs (25 kHz channels) in UK only (Note 8) ATV (Note 2) |
435.000 – 438.000 MHz | 20 KHz | Satellites and fast scan TV (Note 2) 437.000 MHz: Experimental DATV Centre of Activity (Note 10) |
438.000 – 440.000 MHz | 25 KHz (Note 7) | All modes 438.025-438.175 MHz: IARU Region 1 Digital communications 438.200-439.425 MHz: (Note 1) 438.400 MHz: 7.6 MHz Talkthrough (Note 6) 438.425-438.575 MHz: RU66-RU78 7.6MHz split repeaters – inputs 438.6125 MHz: UK DV calling (Note 8) (Note 9) 439.600-440.000 MHz: Digital communications 439.400-439.775 MHz: UK DV 9 MHz split repeaters – Outputs |
Notes
- In Switzerland, Germany and Austria, repeater inputs are 431.050-431.825 MHz with 25 kHz spacing and outputs 438.650-439.425 MHz.
In Belgium, France and the Netherlands repeater outputs are 430.025-430.375 MHz with 12.5 kHz spacing and inputs at 431.625-431.975 MHz.
In other European countries repeater inputs are 433.000-433.375 MHz with 25 kHz spacing and outputs at 434.600-434.975 MHz, i.e. the reverse of the UK allocation. - ATV carrier frequencies shall be chosen to avoid interference to other users, in particular the satellite service and repeater inputs.
- In other countries IARU Region-1 recommend 433.450 MHz for DV calling
- Users must accept interference from repeater output channels in France and the Netherlands at 430.025-430.575 MHz. Users with sites that allow propagation to other countries (notably France and the Netherlands) must survey the proposed frequency before use to ensure that they will not cause interference to users in those countries
- All Internet voice gateways: 12.5kHz channels, maximum deviation +-2.4kHz, maximum erp 5W (7 dBW), attended-only operation in the presence of the NoV holder.
- May be used for Emergency Communications and Community Events
- IARU Region 1 recommended maximum bandwidths are 12.5 or 20 kHz
- Embedded data traffic is allowed with digital voice (DV)
- Simplex use only – no DV gateways
- QPSK 2 Mega-symbols/second maximum recommended
- Exclusion: 431-432 MHz not available within 100km radius of Charing Cross, London
- Power Restriction: 430-432 MHz is 40W erp maximum
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