Dipole Length Calculations 

length (metres)=150/frequency in MHz 

length (inches)=5905/frequency in MHz 

length (feet)=492/frequency in MHz

To allow for 'end factor' multiply constant  by 0.95 for example 492*0.95= 468 (rounded figure)


Loop Calculations

Full-wave loop in feet = 1005 / frequency in MHz. 

Full-wave in meters = 306 / frequency in MHz.

Line of Sight.

To horizon

D(km)=3.57√ H(m) 

D(mi)=1.22√H(ft) 

Horizon to Horizon =D1+D2