Radio Room

My location   : Melbourne
Radio            : Delta Force, Magnum 30W
Antennas       : 5/8 Ground plane verticle and a Five element Yagi on a 50' or 15.2m tower.

* I will soon be building and installing a three element Delta Loop, gain about 10 dBb.
   Due to close tree problems I need a shorter boom length I am afraid.

Here are some usefull formulae for antenna calculations, if you are thinking building your own antenna.

To calculate a wavelength    300     =   wavelength in meters in free space. eg; 300/28.6 = 10.489m
                                      fq(mHz)

To calculate a half wave dipole in say 19mm aluminium try  300                                  300
                                                                                   f(mHz)  x 0.5 x 0.95   eg;    28.6  x 0.5 x 0.95 = 4.982m