VHF & UHF IARU Band Plans - G7SYW's amateur radio bits & bobs...
 
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VHF & UHF IARU Band Plans

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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

  1. Only to be used between stations in different continents (not for intra-European QSOs)
  2. 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
  3. 20 kHz channel spacing. Channel centre frequencies start at 51.430 MHz
  4. Embedded data traffic is allowed with digital voice (DV)
  5. May be used for Emergency Communications and Community Events
  6. 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

  1. Usage by operators in other countries may be influenced by restrictions in their national allocations
  2. May be used for Emergency Communications and Community Events
  3. 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

  1. Meteor scatter operation can take place up to 26kHz higher than the reference frequency
  2. 12.5kHz channels numbered RV48-RV63. RV48 input = 145.000 MHz, output=145.600 MHz
  3. 12.5kHz simplex channels numbered V16-V46. V16=145.200 MHz
  4. Emergency Communications Groups utilising this frequency should take steps to avoid interference to ISS operations in non-emergency situations
  5. Embedded data traffic is allowed with digital voice (DV)
  6. Simplex use only – no DV gateways
  7. EME activity using MGM is commonly practiced between 144.110-144.160 MHz
  8. 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
  9. In other countries IARU Region-1 recommend 145.375 MHz
  10. May be used for Emergency Communications and Community Events
  11. May be used for repeaters in other IARU Region-1 countries
  12. DV users are asked not to use this channel, and use 144.6125 MHz for calling
  13. 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

  1. 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.
  2. ATV carrier frequencies shall be chosen to avoid interference to other users, in particular the satellite service and repeater inputs.
  3. In other countries IARU Region-1 recommend 433.450 MHz for DV calling
  4. 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
  5. 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.
  6. May be used for Emergency Communications and Community Events
  7. IARU Region 1 recommended maximum bandwidths are 12.5 or 20 kHz
  8. Embedded data traffic is allowed with digital voice (DV)
  9. Simplex use only – no DV gateways
  10. QPSK 2 Mega-symbols/second maximum recommended
  11. Exclusion: 431-432 MHz not available within 100km radius of Charing Cross, London
  12. Power Restriction: 430-432 MHz is 40W erp maximum