Bandplanning between 3.500 and 3.800 MHz
3.5 MHz Band
Intercontinental operations should be given priority in the segments 3500-3510 kHz and 3775-3800 kHz.
3510-3600 kHz may be used for unmanned ARDF beacons (CW ) (Davos 2005).
DEFINITIONS
Narrow band modes All modes using up to 500 Hz bandwidth, including CW, RTTY, PSK etc.
Digimodes Any digital mode used within the appropriate bandwidth, for example RTTY, PSK, MT63 etc.
(*) Lowest dial setting for LSB Voice mode: 1843, 3603 and 7053 kHz.
NOTES
CW QSOs are accepted across all bands, except within beacon segments. (Recommendation DV05_C4_Rec_13).
Contest activity shall not take place on the 10, 18 and 24 MHz bands.
The term “automatically controlled data stations” includes Store and Forward stations.
Unmanned transmitting stations:
Sideband Usage Below 10MHz use lower sideband (LSB), above 10 MHz use upper sideband (USB).
IARU REGION 1 HF BAND PLAN – Effective 29th March 2009
HF Managers Handbook
| FREQUENCY (kHz) |
MAX BANDWIDTH (Hz) |
PREFERRED MODE AND USAGE |
| 3500 - 3510 | 200 | CW, priority for intercontinental operation |
| 3510 - 3560 | 200 | CW, contest preferred, 3555 kHz - QRS Centre of Activity |
| 3560 - 3580 | 200 | CW, 3560 kHz - QRP Centre of Activity |
| 3580 - 3590 | 500 | Narrow band modes - digimodes |
| 3590 - 3600 | 500 | Narrow band modes - digimodes, automatically controlled data stations (unattended) |
| 3600 - 3620 | 2700 | All modes - digimodes, automatically controlled data station (unattended), (*) |
| 3600 - 3650 | 2700 | All modes, 3630 kHz - Digital Voice Centre of Activity, SSB contest preferred, (*) |
| 3650 - 3700 | 2700 | All modes, 3690 kHz - SSB QRP Centre of Activity |
| 3700 - 3800 | 2700 | All modes, SSB contest preferred, 3735 kHz - Image Centre of Activity 3760 kHz - Region 1 Emergency Centre of Activity |
| 3775 - 3800 | 2700 | All modes, priority for intercontinental operation |
Intercontinental operations should be given priority in the segments 3500-3510 kHz and 3775-3800 kHz.
Where no DX traffic is involved, the contest segments should not include 3500-3510 kHz or 3775-3800 kHz. Member societies will be permitted to set other (lower) limits for national contests (within these limits).
3510-3600 kHz may be used for unmanned ARDF beacons (CW ) (Davos 2005).
Member societies should approach their national telecommunication authorities and ask them not to allocate frequencies to other than amateur stations in the band segment that IARU has assigned to intercontinental long distance traffic.
DEFINITIONS
All modes CW, SSB and those modes listed as Centres of Activity, plus AM (Consideration should be given to adjacent channel users).
Image modes Any analogue or digital image modes within the appropriate bandwidth, for example SSTV and FAX.
Narrow band modes All modes using up to 500 Hz bandwidth, including CW, RTTY, PSK etc.
Digimodes Any digital mode used within the appropriate bandwidth, for example RTTY, PSK, MT63 etc.
(*) Lowest dial setting for LSB Voice mode: 1843, 3603 and 7053 kHz.
NOTES
Amplitude modulation (AM) may be used in the telephony sub-bands providing consideration is given to adjacent channel users. (NRRL Davos 05).
CW QSOs are accepted across all bands, except within beacon segments. (Recommendation DV05_C4_Rec_13).
Contest activity shall not take place on the 10, 18 and 24 MHz bands.
Non-contesting radio amateurs are recommended to use the contest-free HF bands (30, 17 and 12m) during the largest international contests. (DV05_C4_Rev_07).
The term “automatically controlled data stations” includes Store and Forward stations.
The frequencies in the bandplan are understood as “transmitted frequencies” (not those of the suppressed carrier!).
Unmanned transmitting stations:
IARU member societies are requested to limit this activity on the HF bands. It is recommended that any unmanned transmitting stations on HF shall only be activated under operator control except for beacons agreed with the IARU Region 1 beacon coordinator, or specially licensed experimental stations.
Sideband Usage Below 10MHz use lower sideband (LSB), above 10 MHz use upper sideband (USB).
IARU REGION 1 HF BAND PLAN – Effective 29th March 2009
HF Managers Handbook
