On Thu, 7 Apr 2005 23:27:29 +0000 (UTC), "Reg Edwards"
wrote:


"Wes Stewart" wrote

The line length *is* a factor, however, they give a simplified
approximation for the case of a length more than 20 times the line
spacing and the line spacing less than 1/10 lambda.

P/I^2 = 160 * ( pi * D / lambda)^2

whe

P is in watts

I is the RMS current in a matched line

D / lambda is the wire spacing in wavelengths

===================================

I don't see line length in the formula.


That's because for the condition of length 20 * spacing it drops
out.

What do they say about line lengths less than 20 times wire spacing
for small spacings?

They say a whole bunch of things in a complicated formula full of
cosine integrals, etc. Too complicated to express here in plain
ASCII.

I'll try to scan it to pdf and post is somewhere.

Wes