Find the total wire length and side length of a full-wave loop, as a triangle (delta loop) or a square (quad), for any frequency.
A full-wave loop is one wavelength of wire. Total length in feet = 1005 / frequency in MHz. A delta loop is a triangle (each side is a third of the total); a quad loop is a square (each side a quarter). Loops are quiet on receive and have useful gain over a dipole.
Total length in feet is 1005 divided by the frequency in MHz, which is one wavelength of wire allowing for the loop. At 14.2 MHz that is about 70.8 feet (21.6 m) total.
A delta loop is a triangle and needs only one support, so it is popular for wire antennas. A quad loop is a square and is the basis of the cubical quad beam. Both are full-wave loops with similar performance for a single element.
Feeding at the bottom or a side corner gives horizontal polarisation; feeding a quarter of the way around gives vertical polarisation. A full-wave loop has a feed impedance near 100 to 120 ohms, so a quarter-wave 75-ohm matching section is common.