You have been given some good information in these posts. If you want to understand the "why" of all this I will explain. Radio waves travel at the speed of 300 million meters a second (same as light in a vacuum) or 984 million feet per second. Frequency is the measure of how many wavelengths per second. So, if we divide the speed of travel in seconds by the number of waves per second we get the lenght of one full wave (or cycle). Thus 984 (million) divided by the frequency in megahertz (million) gives us the length of one full wave. But antennas are usually a 1/4 wavelength so taking 1/4 of 984 equals 246. Thus 246 divided by the frequency in megahertz gives us the distance for a quarterwave antenna in feet. Simple
Last edited by northzone; 08072005 at 4:00 PM..
