On 7/28/22 8:01 AM, N0YWB wrote:
The formula (feet)=234/MHz for a quarter wavelength is just a rough starting point.
The resonant length is affected by many variables, like conductor diameter and
the placement of nearby conductors within 2 wavelengths, including other antennas and the earth.
It usually comes down to:
measure in place, then take down and adjust length. Repeat.
Or use a tuner at the feedpoint. Small changes in resonant frequency (10%) are easily tuned out with minimal loss. Even with a feedline, and tuner at the radio end, the losses are small.
