In message <3A531C89.2032.BB2276@localhost>, Mike Dennison
<[email protected]> writes

But of course the statement is true. 1W ERP from a dummy load inside a Faraday screeen inside lead-lined container will also radiate as well as 1W ERP from a full sized dipole. The key word is Radiated (the R in ERP). You will need an awful lot of megawatts (gigawatts?) to get 1W ERP from such a dummy load but once that watt is radiated there is no difference.

Hello Mike and others,

Am I correct in thinking that because a full-sized dipole or other very
large antenna, at a sufficient height, will have a different radiation
pattern from a short monopole, 1 watt ERP from each antenna judged by
field strength measurement at the same location will give rise to
different field strengths at various other distances because the sum of
sky and ground wave effects changes differently with distance for the
two antenna types?

73, Alan, G3XZX