Wavelength & coax stub
Free-space wavelength and physical cable stub length.
Physical coax stub--
--
Wavelength and Coax Stub Length Calculator
Calculate free-space wavelength and physical full, half or quarter-wave coax stub lengths.
About this calculator
How to use it
Enter frequency, cable velocity factor and the required wavelength fraction to calculate a physical coax length.
Understanding the result
Confirm the manufacturer's velocity factor for the exact cable. Connector length and construction can shift the final electrical length.
More ham radio calculators
Use this calculator as a practical starting point. Check critical radio, electrical and installation work with suitable test equipment and current licence requirements.