- View SourceHi,

I don't talk about the geometry of the lines up in the air.

Your photo shows a 3 phase supply system.

We need to look at the voltages only: in a 220 kV system we have

pahse A : u(t) = sqrt(2)*220000 * sin ( 2* pi*50 *t )

pahse B : u(t) = sqrt(2)*220000 * sin ( 2* pi*50 *t + 120 degrees)

pahse C : u(t) = sqrt(2)*220000 * sin ( 2* pi*50 *t + 240 degrees)

These phase offsets do have a prominent influence on the far field E vector.(a distance large in comparison to the distance between the lines - this is where geometry really counts)

Likewise for the current under your assumption of purely resistive load.

I think you do it right only the text was misleading to me.

Walter - View SourceA new article is on line:

"A High Bandwidth, Low Noise Optical VLF Link"

This article describes the design, characteristics and use of a high bandwidth, low noise optical system for connecting a VLF receiver to a data sampling system. This easy to build, inexpensive system has a flat response to over 200KHz, and a noise curve well below the VLF band.

by Mike Smith

73, Renato Romero