Scanned Antennas book by Kraus
 

On Sun, 29 Apr 2007 23:24:30 -0400, "Jimmie D"
wrote:


"Cecil Moore" wrote in message
t...
Dave (from the UK) wrote:
http://www.pmillett.com/Books/Kraus_antennas.pdf (7.9 MB)

This is great, Dave. Everyone who wants to see the standing
wave phase shift up and down a 1/2WL antenna can look at
page 239. Kraus shows a ~3 degree phase shift all up and
down the antenna. EZNEC shows the same thing. Now how did
Roy use this current to determine the phase shift through
a loading coil if it cannot be used to determine the phase
shift through a wire?
--
73, Cecil http://www.w5dxp.com

A real shame you cant copy and paste text from a pdf file.

Jimmie


You can, but in the case where a book is scanned the pages are handled
as graphics and not text. To do so all pages would have to be
processed using OCR software after scanning which is a major pain and
very time consuming.

Danny, K6MHE

Scanned Antennas book by Kraus
 

"Cecil Moore" wrote in message
t...
Jimmie D wrote:
A real shame you cant copy and paste text from a pdf file.

Will the full-featured Adobe Acrobat do that?
--
73, Cecil http://www.w5dxp.com

You can copy and paste TEXT from the pdf file. As mentioned the Kraus book
is scanned in the gif fromat and the text you are seeing is actual an image.
To get part of the text out of the gif that is in the pdf file , you have to
treat it as a picture and use the snapshot tool and cut out what you want to
paste into another documment.
What you have done is move part of an image file and not part of a text
file.

Atleast that is how it works with the Adobe Reader 7 and MS word.

Scanned Antennas book by Kraus
 

Jimmie D wrote:

Cecil Moore wrote:
Dave (from the UK) wrote:
http://www.pmillett.com/Books/Kraus_antennas.pdf (7.9 MB)

This is great, Dave. Everyone who wants to see the standing
wave phase shift up and down a 1/2WL antenna can look at
page 239. Kraus shows a ~3 degree phase shift all up and
down the antenna. EZNEC shows the same thing. Now how did
Roy use this current to determine the phase shift through
a loading coil if it cannot be used to determine the phase
shift through a wire?
--
73, Cecil http://www.w5dxp.com

A real shame you cant copy and paste text from a pdf file.

Jimmie

You can, IF the document page(s) wasn't/weren't scanned as an image. For
text to be searchable, the scanning device would need to have "Optical
Character Recognition" capability.
Bryan WA7PRC

Scanned Antennas book by Kraus
 

Dave (from the UK) wrote:
There is a scanned copy of a book you may find interesting:

----
Antennas, John D. Kraus, Ph.D.., 1950, 553 pages

This book is a college text and engineering reference on antennas. A
pretty thorough theoretical treatment along with practical information
on antenna design.
-----

See

http://www.pmillett.com/Books/Kraus_antennas.pdf (7.9 MB)

More books at

http://www.pmillett.com/technical_books_online.htm

Apparently the copyright has expired on these books, so they are not
pirated. I actually own a copy of the Kraus book, but it is attractive
to have a copy on my laptop.


--
Dave (from the UK)

Please note my email address changes periodically to avoid spam.
It is always of the form:
Hitting reply will work for a few months only - later set it manually.

http://chessdb.sourceforge.net/ - a Free open-source Chess Database

Dave,
That is a most welcome collection, and very worthy of bookmarking. Thank
you!
73,
Bryan WA7PRC

Scanned Antennas book by Kraus
 

OCR = Optical Charactor Recognition

recognises charactors in a graphics file/picture and can pull them
out..........P


"Cecil Moore" wrote in message
...
Dave (from the UK) wrote:
http://www.pmillett.com/Books/Kraus_antennas.pdf (7.9 MB)

This is great, Dave. Everyone who wants to see the standing
wave phase shift up and down a 1/2WL antenna can look at
page 239. Kraus shows a ~3 degree phase shift all up and
down the antenna. EZNEC shows the same thing. Now how did
Roy use this current to determine the phase shift through
a loading coil if it cannot be used to determine the phase
shift through a wire?
--
73, Cecil http://www.w5dxp.com

Scanned Antennas book by Kraus
 

"Jimmie D" wrote in message
...

Everyone who wants to see the standing
wave phase shift up and down a 1/2WL antenna can look at
page 239.

A real shame you cant copy and paste text from a pdf file.

If your needs are modest, you can, at least in Windows.

(1) Get the desired text as large as you can on the screen.
(2) Press the Print Scrn key
(3) Open the "Paint" program
(4) Click File NewEditPaste
(5) Trim and resize as desired, using the few available features in Paint.
(Too much increase will start to show jaggies, as this is a primitive
process.)

Admittedly, the result is not editable, but it might work for you.

Scanned Antennas book by Kraus
 

"Sal M. Onella" wrote in message
...

"Jimmie D" wrote in message
...

Everyone who wants to see the standing
wave phase shift up and down a 1/2WL antenna can look at
page 239.

A real shame you cant copy and paste text from a pdf file.

If your needs are modest, you can, at least in Windows.

(1) Get the desired text as large as you can on the screen.
(2) Press the Print Scrn key
(3) Open the "Paint" program
(4) Click File NewEditPaste
(5) Trim and resize as desired, using the few available features in Paint.
(Too much increase will start to show jaggies, as this is a primitive
process.)

Admittedly, the result is not editable, but it might work for you.





I was thinking in terms of posting excerpts on the newsgroup. Binaries are
frowned upon here

Jimmie

Scanned Antennas book by Kraus
 

Jimmie D wrote:
I was thinking in terms of posting excerpts on the newsgroup. Binaries are
frowned upon here

OCR software could be used for ASCII text but without the
equations and graphics, excerpts are of limited usefulness.
Here's how I solved the quoting problem:

http://www.w5dxp.com/krausdip.jpg

http://www.qsl.net offers free web pages to amateur radio
operators.
--
73, Cecil http://www.w5dxp.com

Scanned Antennas book by Kraus
 

Danny Richardson wrote:

You can, but in the case where a book is scanned the pages are handled
as graphics and not text. To do so all pages would have to be
processed using OCR software after scanning which is a major pain and
very time consuming.

Danny, K6MHE


I used the OCR software in Adobe Acrobat (version 8 came on my laptop).
Of all the free programs that came on my laptop, that is by far the most
useful one. Many are not worth the disk space they take up.

Acrobat 8 did a pretty good job of the OCR. It increased the file size
dramatically from about 8 to 17 MB, but it seems to have converted it to
text OK. A search on "maxwell" showed 20 references and each line of
text the search found looked fine, with no misspellings.

You can download a free 30 day trial of Acrobat 8 (I use the standard,
not pro version). Give it a try - I think you will be impressed.


--
Dave (from the UK)

Please note my email address changes periodically to avoid spam.
It is always of the form:
Hitting reply will work for a few months only - later set it manually.

http://chessdb.sourceforge.net/ - a Free open-source Chess Database

Scanned Antennas book by Kraus
 

Cecil Moore wrote:

...
Here's how I solved the quoting problem:

http://www.w5dxp.com/krausdip.jpg

http://www.qsl.net offers free web pages to amateur radio
operators.

Cecil:

I expected a textual description.

You copied the "image" from adobe, then pasted that image into a image
handling application and saved it as a jpeg image???

By the way, "Fine Reader" is the best OCR application--in my humble
opinion ... it seemingly works like "magic." :-)

Regards,
JS