BRATS - Advanced Amateur Radio Tuition Course

Brats club logo 


Syllabus Sections:-

Band Plans

8e.1 Recall that band plans are produced by the IARU.

Recall that the band plans state that:

  • no SSB operation should take place in the 10MHz 30m band

  • no contests should be organised in the 10MHz (30m), 18Mhz (17m) and 24MHz (12m) bands

  • narrow band modes are at the lower end of most bands

  • lower sideband operation normally occurs below 10 MHz and upper sideband above 10MHz

  • transmission on beacon frequencies must be avoided.

  • transmission on satellite frequencies should be avoided for terrestrial contacts.

Questions on beacon and satellite frequencies will be limited to the 14Mhz (20m) and 144MHz (2m) bands and copy of the Band Plans will be provided.


The band plans are an agreed use of the radio spectrum and as such are produced by the IARU (International Amateur Radio Union).

Whilst some band plans are included in the documentation for the exam for the 14Mhz (20m) and 144MHz (2m) bands you need to know that on other band plans it states that:

  • no s.s.b. operation should take place in the 30m band

  • no contests should be organised in the 12, 17 and 30m bands (WARC bands WARC = World Administrative Radio Conference)

  • narrow band modes are at the lower end of most bands

  • The standard operating practice for SSB PHONE contacts is to use LSB below 10 MHz, and USB above 10 MHz. This is not a regulation, nothing forbids you from using the "other" sideband, but then who would you talk to? So LSB operation normally occurs below 10 MHz and USB above 10MHz

    HOWEVER -- Now, with the digital modes old RTTY operators say that RTTY is LSB everywhere, and new PSK operators say that PSK is USB everywhere, and that if things don't work to just use the software "invert" switch!!

  • transmission on beacon frequencies must be avoided.

  • transmission on satellite frequencies should be avoided for terrestrial contacts.

It is also a good idea to be aware of the beacon and satellite frequencies on these two bands.

Frequency MHz

Mode

UK Usage

144.400 - 144.490 Telegraphy, MGM = Machine Generated Morse Beacons only
144.490 - 144.500 Guard Band
145.200 FM Space communication eg. ISS
145.800 FM Space communication eg. ISS = International Space Station
145,806 All modes Satellite exclusive

14.000 - 14.250
Amateur Satellite Service - Primary user.
14.099 - 14.101
IBP - reserved exclusively for beacons

Note: IBP = International Beacon Project


brats copyright logo