antennas

I want to transmit a sine wave signal at the frequency of 5KHZ to a distance of 1 kilometer or maybe a little less. Can someone tell me if this is possible and if it is possible can you suggest me the required amplifier and antenna?

I have got stuck on the theory around the matter of tweaking the electrical length of an antenna by adding L or C somewhere along the transmission line. From transmission theory, the phase velocity in a conducting medium is 1 over the square root of the L and C values per meter, as in the...