To calculate antenna gain needed to achieve a desired ERP:
Transmitter Output Power :	W or kW
Frequency :	MHz
Transmission Line Type :	LMR 400 LMR 600 LMR 900 LMR 1200 LMR 1700 1/2" Foam Heliax 5/8" Foam Heliax 7/8" Foam Heliax 1-1/4" Foam Heliax 1-5/8" Foam Heliax 2-1/4" Foam Heliax
Transmission Line Length :	Feet
Desired Effective Radiated Power :	W or kW
=	dBd