33 centimeters band
33 centimeters is a US-centric experimental UHF band shared with other services, popular for digital links, mesh networking, and point-to-point experimentation.
Propagation & character
Line-of-sight and relatively short range, but excellent for high-speed data with dish or horn antennas.
What 33 centimeters is used for
Digital links, AREDN mesh networking, some repeaters, and microwave experimentation.
Operating tips
- It is shared with unlicensed Part 15 devices, so expect some background noise.
- It is a favorite for ham mesh (AREDN) and microwave experimentation.
- It is not allocated to amateurs in many countries.
Antennas for 33 centimeters
A half-wave dipole for 33 centimeters is about 0.5 ft (0.2 m) end to end. Work out an exact starting length with the antenna calculator, then trim for lowest SWR.
33 centimeters band FAQ
What frequencies is the 33 centimeters band?
The 33 centimeters band covers 902–928 MHz — part of the ultra high frequency (UHF) spectrum. Common modes are Digital, data/mesh, experimental.
What is the 33 centimeters band used for?
Digital links, AREDN mesh networking, some repeaters, and microwave experimentation.
What license do you need to use 33 centimeters?
All classes, including Technician.
How long is a dipole for 33 centimeters?
A half-wave dipole for 33 centimeters is about 0.5 ft (0.2 m) end to end, with each leg half that. Use the HamDaily antenna calculator for an exact starting length, then trim to resonance.