2.8 Frequency Bands and Power Output

Under an Amateur Licence, operation is limited to specific frequency bands, and the transmitter output power is regulated to ensure safe and effective use of the radio spectrum. For Foundation Licence holders, these regulations are particularly important to understand and adhere to.

Frequency Bands

• Authorised Bands: Amateur radio operators are permitted to use certain frequency bands that are allocated specifically for amateur use. These bands are designated to facilitate non-commercial communication, experimentation, and emergency services.
• Foundation Licence Bands: Foundation Licence holders in Australia have access to a range of HF, VHF, and UHF bands. The specific bands available are detailed in the Radiocommunications Licence Conditions (Amateur Licence) Determination 2015.
  • HF Bands: Common HF bands available to Foundation Licence holders include portions of the 80m (3.5 MHz), 40m (7 MHz), 15m (21 MHz), and 10m (28 MHz) bands.
  • VHF Bands: The 2m band (144-148 MHz) is typically available for use.
  • UHF Bands: The 70cm band (430-450 MHz) is accessible for Foundation Licence holders.

Power Output

• Maximum Power Limit: The Foundation Licence restricts transmitter output power to a maximum of 10 watts pX (peak envelope power). This limit is in place to minimise the risk of interference with other radio services and to ensure safe operation.
• Compliance: Adhering to the power limit is crucial for maintaining your licence and avoiding penalties. Operators must ensure that their equipment is configured correctly to not exceed this power limit.

Change of Address Notification

• ACMA Notification: Foundation Licence holders are required to notify the Australian Communications and Media Authority (ACMA) of any change of address. This ensures that the ACMA’s records are up to date and that the licence holder can be contacted if necessary.
• Procedure: The notification process typically involves completing a form or updating details online through the ACMA’s website. It is important to do this promptly to remain compliant with the regulations.

Practical Considerations

• Understanding Your Bands: Familiarise yourself with the frequency bands available to you under the Foundation Licence. Use band plans and charts to ensure you are operating within the authorised frequencies.
• Monitoring Power Output: Regularly check your transmitter’s power output to ensure it does not exceed the 10-watt limit. Using a power meter can help you stay within the permissible limits.
• Updating Contact Information: Keep your contact details current with the ACMA. This includes promptly notifying them of any changes in your residential address to avoid any lapses in communication or compliance issues.

Examples of Frequency Band Usage

• Daytime and Night-time Use: Different HF bands have varying propagation characteristics, making some more effective during the day and others at night. For example, the 40m band is often good for both day and night use, while the 80m band is typically better at night.
• VHF/UHF Use: VHF and UHF bands are ideal for local communications and are commonly used for repeaters and simplex contacts within a local area.