by **k8jd** » Sat Mar 12, 2011 2:20 am

If you use the formula; L=468/F. the L is the entire length from one loop at the end insulator to the other end loop around the other end insulator.

Each wire from the coax connection to one end insulator is 1/4 wave.

The entire dipole length is 1/2 wavelength.

This formula is an aproximation. The exact length is arrived by using your SWR meter and trimming the wire for a fine adjustment .to get the minimum reflected power.

You may want to start a foot longer than the formula length and trim equal amounts off each end after measuring the reflected power and repeat the trimming a few inches at at a time until a minimum SWR reading is attained..

Raising and lowering the antenna for trimming sounds tedious but the result is quite rewarding.

The length will vary according to; the height above ground, the ground conductivity in your location and surrounding objects.

Have Fun

73 from K8JD, SKCC 1395, Centurion 18, Tribune 12, Band Endorsements; 160, 80, 60, 40, 30M, 20, 17, and 10M

Ham radio is real Radio, CW is real Hamming!