 ```...................... I found a FS of 370 microvolt/metre. From this follows an impressive ```radiated power (EIRP) of 52 milliwatt. I guess). what program did you use ? ``` You don't need a programme, just work from basic theory ...... ``````From Ohms law E^2 / Zo (of free space = 377 ohms) = Watts / m^2 ``````At a distance R from an omnidirectional radiator (the definition of EIRP), ```all the transmitted power is spread out over a sphere of surface area 4 * PI * R^2, which is equal to your measured power density in W/m^2 ```So EIRP of Tx = (Watts / m^2) * 4.PI.R^2 = E^2 / 4 * PI * R^2 where E isthe measured field strength in Volts / metre Then if you really want it in terms of dipole ERP, just subtract the magic figure of 2.14dB ( or divide by 1.64) , ie. the gain of a dipole. Andy G4JNT -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). ```For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is ```prohibited and may be unlawful. ```