Repeaters & Radiophone

• Helpful for mobile devices that don’t have much power → repeater boosts the signal
• Advanced license required to set one up
• Uses duplex communication, transmitting on one frequency and retransmitting on another
• You can’t retransmit below 29.5 MHz without the Basic w/Honours or Advanced Qualification
• Basic allows you to be retransmitted in 29.5-29.7 MHz and anything above 30MHz
• Radio telephony/repeaters are very popular and heavily shared
  • Unmodulated signals to repeaters are only allowed for brief tests up to 148 MHz
  • Good frequency stability & overmodulation protection is required to limit bandwidth
    • Use the full 100% of the bandwidth, but no more