[MLB-WIRELESS] Success with GHO

[Brenton D.]

ah okay cool, yeah my link to gho is down atm, as its still running in ap 
mode to see if you can get a signal.


----- Original Message ----- 
From: "Peter Berrett" <berrettp at optusnet.com.au>
Cc: <melbwireless at wireless.org.au>
Sent: Sunday, September 30, 2007 3:27 PM
Subject: [MLB-WIRELESS] Success with GHO


> Hi all
>
> I have modified the 24db Galaxy dish I purchased off Peter B. and
> created a new dipole to drive the antenna. I compared it to my cantenna
> (estimated gain 12 db) and there is definently an improvement of 8-10 db
> over the cantenna.
>
> One interesting discovery was the polarisation of the feed.  The
> reflector is like a series of copper pieces each about 1.5 cm wide with
> a similarly sized gap between each. These gaps are quite long (>10 cm).
> Initially I polarised the feed perpendicular to the copper strips  but
> the results were disappointing. When however I polarised the feed
> parrallel to the strips the results were significantly improved. Thsi
> seems counter-intuitive to me.  I suspect that if I was to put some
> aluminium fly screen over the gaps berween the strips I would get even
> more gain. Because the gaps exceed 1/10 of a wavelength it probably is
> not a perfect faraday cage.
>
> I had no problem logging in to GHO although I noted that several nodes I
> had bookmarked on my laptop were unavailable.  This may be due to the
> cloud that has been hanging around Mt Dandenong affecting some of the
> links?
>
> I shall try and see if I can get through to FUT today with the Galaxy
> Antenna from my location (JXG) . It would be tempting to go up to Mr
> Dandenong and see what kind of range one can get with an antenna like 
> this.
>
> cheers Peter
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