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<DIV><FONT face=Arial size=2>Thanks for the reply, but i'm not sure you get
exactly what i mean</FONT></DIV>
<DIV><FONT face=Arial size=2>What im thinking of building is a passive repeater,
one end with a dish type antenna pointing at the nearest mobile tower, and the
other end a small omni antenna in the middle of the house (hopefully) supplying
the house with optus reception</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Kieran</FONT></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=tlangdon@atctraining.com.au
href="mailto:tlangdon@atctraining.com.au">Tony Langdon</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=slab@flashmail.com
href="mailto:slab@flashmail.com">'Kieran Seal'</A> ; <A
title=melbwireless@wireless.org.au
href="mailto:melbwireless@wireless.org.au">melbwireless@wireless.org.au</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, October 17, 2002 8:59
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> RE: [MLB-WIRELESS] Mobile Phone
towers and the such</DIV>
<DIV><BR></DIV>
<DIV>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2></FONT></DIV><FONT face=Arial size=2>Gday people</FONT></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">
<DIV><FONT face=Arial size=2>This is a bit off topic from wireless data
networks, but it's on the topic of wireless anyway so i thought i'd ask a
few questions anyway</FONT></DIV>
<DIV><FONT face=Arial><FONT size=2>I was thinkin the other day, my house is
on one side of a hill, where we get telstra and vodafone reception, but no
optus at all. Well, there is one scenario where you get pissweak optus. When
the phone is held up against the window pane. Which made me think, does
glass (or a specific size of glass) resonate at the frequencies mobile
phones transmit at? Or am i way off here.. I think i might be partially
right, coz in the middle of the house there's no reception, but at either
sides (20m apart) on windows, there is reception.<SPAN
class=618525222-16102002><FONT
color=#0000ff> </FONT></SPAN></FONT></FONT></DIV></BLOCKQUOTE>
<DIV dir=ltr><FONT face=Arial><FONT size=2><SPAN
class=618525222-16102002><FONT color=#0000ff>Domestic glass shouldn't cause a
problem. The tinted glass used in commercial offices does do horrible
things to RF (I know, I've tangles with it many times on many bands :)
).</FONT> </SPAN></FONT></FONT></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">
<DIV><FONT face=Arial><FONT size=2>Anyway, that's a bit off topic again. I
was thinking, if i get a galaxy antenna, and mod the dipole so that it's the
right length for mobile phone frequencies, and then connect that to an omni
in the middle of the house, would this passive repeater give me reception?
Or would the signal be way too weak to use a passive transmitter? If it was
too weak, would i be able to use a low power amplifier?<SPAN
class=618525222-16102002><FONT
color=#0000ff> </FONT></SPAN></FONT></FONT></DIV></BLOCKQUOTE>
<DIV dir=ltr><FONT face=Arial><FONT size=2><SPAN
class=618525222-16102002><FONT color=#0000ff>At 900 MHz, a Galaxy antenna is
not goint to be really effective. a "24 dBi" with a 900 MHz feed
would give reasonably good (arounf 12-15dBi) gain at these
frequencies, but it would be less trouble to do one of two
things:</FONT></SPAN></FONT></FONT></DIV>
<DIV dir=ltr><FONT face=Arial><FONT size=2><SPAN
class=618525222-16102002></SPAN></FONT></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial><FONT size=2><SPAN
class=618525222-16102002><FONT color=#0000ff>1. Buy a GSM omni
antenna. They can be bought from DSE or some
mobile</FONT> <FONT color=#0000ff>phone
retailers.</FONT></SPAN></FONT></FONT></DIV>
<DIV dir=ltr><FONT face=Arial><FONT color=#0000ff size=2><SPAN
class=618525222-16102002>2. Build an antenna. Either an omni (I'm sure
Troy could knock one up ;) ) or a Yagi.</SPAN></FONT></FONT></DIV>
<DIV dir=ltr><FONT face=Arial><FONT color=#0000ff size=2><SPAN
class=618525222-16102002></SPAN></FONT></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial><FONT color=#0000ff size=2><SPAN
class=618525222-16102002>Adding an antenna is probably legal (afterall, some
are available aftermarket). Adding an amplifier can incur _very_ severe
fines (> $100,000), unless they are ACA approved. Your biggest
challenge in getting an antenna working is finding the right connectors.
:)</SPAN></FONT></FONT></DIV><BR>
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