Which type of modulation is commonly used for VHF and UHF voice repeaters?

Frequency Modulation (FM) and Phase Modulation (PM) are the standard modulation types used for VHF and UHF voice repeaters. These modes are highly resistant to static and interference, providing clear, high-fidelity audio for local communications. Phase Modulation is very similar to FM and can be received on standard FM equipment without issues. Modes like AM or SSB are more susceptible to noise and are typically reserved for aviation or weak-signal work, while PSK is a digital data mode, not a voice mode.