On Fri, 11 Dec 2009 15:51:04 -0800, Jeff Liebermann
wrote:

On Sat, 28 Nov 2009 19:02:45 -0800, Jeff Liebermann
wrote:

I did some cleanup, error correcting, and tinkering with the model of
the MFJ-1800 2.4GHz Yagi-Uda antenna. Mostly, I tried to make the
model as close to the original antenna as possible and recovering the
macros to make it easier to tweak:
http://802.11junk.com/jeffl/antennas/mfj1800/
The NEC2 file is under the "main" mfj-1800.jpg page. Cut-n-paste
works.

Data sheet, of sorts:
http://www.mfjenterprises.com/Product.php?productid=MFJ-1800

Duz this construction look familiar?
http://microblog.routed.net/2008/05/31/howto-make-a-simple-and-cheap-yagi-antenna-for-wifi-applications/
Note the driven element construction:
http://microblog.routed.net/wp-content/uploads/2008/05/0531081411.jpg
10dBi gain without the necessary 4:1 balun. Oh well.

More. The original site mentioned in the above article evaporated in
2008, but the contents are still on the Way Back project site at:
http://web.archive.org/web/20080611022024rn_1/www.andrewhakman.dhs.org/yagi/

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# Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060
# 831-336-2558
# http://802.11junk.com
# http://www.LearnByDestroying.com AE6KS