Gets a "little complicated.." ??? Amen! The laws have been more like
"totally subverted" from their original intent.
Strange there is no way to search the database, specifically, for expired
copyrights! Huh, almost enough to trigger my "conspiracy theory"
tendencies! Of course, perhaps Micro$oft developed the database--that would
be one acceptable explaination...

Regards,
John

--
I would like to point out, I do appreciate the "Been there--done that!"
posts. Indeed, now your observations, comments and discourse should be
filled with wisdom--I am listening!!!
"Dee Flint" wrote in message
...

"Hal Rosser" wrote in message
. ..

"John Smith" wrote in message
...
To all:

It is my understanding that all gov't materials, since paid for by
taxpayers, are non-copyright.
Also, any material before 1923 would have expired copyrights and,
undoubtably, a significant amount of material will have been published
"public domain";

So, you're saying that anyone could republish a book like "Moby Dick"
and sell it as their own since it was published before 1923 ?
I'm no lawyer, but I believe copyright live on. Patents expire.
If you're just wanting to build an antenna that someone else thought of
first
then you just 'do it' - just be careful about patent infringements if you
try to sell those antennas.



There are several websites addressing copyright. Here in the US,
copyrights before 1923 are indeed expired. Some copyrights after this
date are also expired depending on renewal status at the times of various
copyright law changes but that gets a little complicated. No they cannot
publish the material as their own as that is plagiarism but they can
publish it without permission of the original copyright holder and do not
have to pay anyone for the right to print it. When a publishing house
prints a new edition of "Moby Dick", all the money goes to the publishing
house. None goes to the author's estate or heirs.

On Mon, 11 Apr 2005 22:22:59 -0700, "John Smith"
wrote:

Gets a "little complicated.." ??? Amen! The laws have been more like
"totally subverted" from their original intent.
Strange there is no way to search the database, specifically, for expired
copyrights! Huh, almost enough to trigger my "conspiracy theory"
tendencies! Of course, perhaps Micro$oft developed the database--that would
be one acceptable explaination...

Regards,
John

More to your original question, the Government Printing Office has a
website and a search engine -- but it brings up only some rather
mundane papers when searching for "antennas"...

bob
k5qwg

More to your original question, the Government Printing Office has a
website and a search engine -- but it brings up only some rather
mundane papers when searching for "antennas"...

bob
k5qwg

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

Before anybody can get anything out of the Internet somebody has to be
paid to put it in.

Radio amateurs are but a small proportion of the world's population.
I'm for ever surprised at the quantity of information which is
availble.

Tthe big question mark hanging over 'information" is Reliability? Can
you believe it? Google is anything but the Bible. Much information is
from sources as trustworthy as where the weapons of mass destruction
came from.

But searching is a pleasant pastime, is it not? And it's seldom a
matter of life or death.
----
Reg, G4FGQ

Reg Edwards wrote:
But searching is a pleasant pastime, is it not?

I was at work (GED teacher) the other day and wanted to
gin up an Excel program for converting series impedances
to parallel impedances and vice versa. I wanted to verify
my memory on those equations. I spent two hours trying to
find them on the web and never did. That search was not
pleasant. 99.9% of series to parallel stuff on the web
is digital.
--
73, Cecil http://www.qsl.net/w5dxp


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On Tue, 12 Apr 2005 10:38:53 -0500, Cecil Moore
wrote:

converting series impedances
to parallel impedances and vice versa. I wanted to verify
my memory on those equations. I spent two hours trying to
find them on the web and never did.

Google: converting series impedances
second response points at:
http://www.cebik.com/trans/zcalc.html

2 minutes tops

Richard Clark wrote:
Google: converting series impedances
second response points at:
http://www.cebik.com/trans/zcalc.html

2 minutes tops

The firewall at the GED office doesn't allow access
to Google. I was using the Netscape search engine
searching for "series to parallel impedance conversion"
which yielded http://www.cebik.com/gup/gup23.html. Those
equations are NOT on that page.
--
73, Cecil http://www.qsl.net/w5dxp


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On Tue, 12 Apr 2005 13:29:10 -0500, Cecil Moore
wrote:
The firewall at the GED office doesn't allow access to Google.
Google Education Deficient?

In article , Cecil Moore wrote:

I was at work (GED teacher) the other day and wanted to
gin up an Excel program for converting series impedances
to parallel impedances and vice versa. I wanted to verify
my memory on those equations. I spent two hours trying to
find them on the web and never did. That search was not
pleasant. 99.9% of series to parallel stuff on the web
is digital.

The easiest way I found to figure this out, is to start from the
basic Ohm's Law formula for two impedances in parallel:

Zt = (Z1)(Z2) / (Z1 + Z2)

Let Z1 be a purely real impedance (Rp + j0) and Z2 be a purely
imaginary impedance (0 + jXp) and calculate from there.

It was a fun bit of scratchpad-and-pencil-in-the-afternoon to start at
Ohm's Law, and end up with a pretty decent understanding of how L- and
T-match antenna tuners (transmatches for the purist) actually do what
they do.

--
Dave Platt AE6EO
Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!