"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.

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

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

On Fri, 08 Apr 2005 06:05:49 -0700, Wes Stewart
wrote:


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

http://www.qsl.net/n7ws/Sterba_Openwire.pdf

Wes Stewart wrote:
http://www.qsl.net/n7ws/Sterba_Openwire.pdf

There seems to be a dotted line for feedline
radiation going to zero as feedline length
goes to zero. :-)
--
73, Cecil http://www.qsl.net/w5dxp


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On Fri, 08 Apr 2005 10:19:31 -0500, Cecil Moore
wrote:

Wes Stewart wrote:
http://www.qsl.net/n7ws/Sterba_Openwire.pdf

There seems to be a dotted line for feedline
radiation going to zero as feedline length
goes to zero. :-)

So it would seem. QRX, Reg will explain. :-)

On Fri, 08 Apr 2005 06:42:05 -0700, Wes Stewart
wrote:

On Fri, 08 Apr 2005 06:05:49 -0700, Wes Stewart
wrote:


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

http://www.qsl.net/n7ws/Sterba_Openwire.pdf

My first scan didn't have the appendix.

It's there now.

On Fri, 08 Apr 2005 08:54:11 -0700, Wes Stewart
wrote:

On Fri, 08 Apr 2005 06:42:05 -0700, Wes Stewart
wrote:

On Fri, 08 Apr 2005 06:05:49 -0700, Wes Stewart
wrote:


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

http://www.qsl.net/n7ws/Sterba_Openwire.pdf

My first scan didn't have the appendix.

It's there now.

Hi Wes,

Could I trouble you for a copy of section IV that continues on beyond
page 1180? I am interested in the discussion relating to Figure 12 so
you can restrict your efforts to that if this section runs on too
long.

Thanks,
Richard, KB7QHC