In the UK max Power is 100mW. I am yet to find one that actually has an EIRP
of 100mW. Most are 16dBm (40mW) with 2dBi antennas.

Does anyone do one that actually transmits 100mW? I want to get a decent
range in a Bath Stone house

TheDragon wrote:
Look at the link to Demarctech in my post in the thread
"Satellite to Outbuildings" from yesterday. They go that high and a lot
more.

TheDragon wrote:
Linksys WRT54G can do it with the proper firmware.

Mads Bahrt wrote:

But you should be aware that you will need an equally powerfull access
point - the connection needs to be both ways.

Mads Bahrt wrote:

Show quoteHide quoteNot necessarily true. the connection needs to be both ways, but just as
some transmitters are more powerful than others so some receivers are
more sensitive. If the router has a more sensitive receiver than the
other device then it may be capable of receiving a much weaker signal
than the device at the other end of the connection. In that case
increasing the router power may increase range.

I don't know how the receiver sensitivities compare, but it would not
suprise me at all if the WRT54G had a much better receiver than a
typical laptop card. A Google search finds comments such as:

"Initial tests show a much higher RX sensitivity than most cards"

or:

"The little Linksys WRT54G box is a terrific generic Linux platform to
run just about any networking code on. I have found that the radio on it
when cranked up to its full 84mw is better than any of my pcmcia cards
including the 100mw Cisco-350 I normally use when I need to pick up some
distant signal. I have this 5dbi Maxrad antenna I normally use with the
Cisco card and even with that it doesn't match the sensitivity of the
WRT54G with the stock antennas."

Show quote Hide quote Many thanks for these links, I did see your thread on the 500mW variant AP,
however at $799 its a bit pricy.

The Link SYS looks good, also looking at www.signal-seeker.com looks pretty
good, If its claims are correct

TheDragon wrote:
For clarity's sake, assuming you were referring to my post, I wasn't
talking about one of the $800 AP's, it was $179. And Ed Williams' Signal
Seeker may very well be a good or even the best solution, but he's
reluctant to describe the product in actual specifications instead of
advertising lingo. He has offered one to a senior "member" of the group
for testing, but I've not seen the offer go anywhere yet.

Note to Ed: all your picture links are broken except the main one on
your eBay ad. Might want to check on that.

Show quote Hide quote I recognised the name and remembered the 500mW AP I saw.
http://www.demarctech.com/products/reliawave-rwg/reliawave-rwg-id-gbridge-ap.html

On 23 Mar 2005 15:42:50 GMT, Duncan Booth
<duncan.booth@invalid.invalid> wrote:

This might help:
  http://freenetworks.org/moin/index.cgi/ReceiveSensitivity


Sigh.  I kinda like numbers.  I especially like numbers that are
reproduceable.  I *REALLY* like numbers that came from proper bench
tests, using standardized proceedures, and calibrated equipment.
I'll even tolerate wrong numbers as long as they're consistantly wrong
in the same reproduceable way.

I've found that the measured sensitivity of most receivers using a
given chipset are about the same at a given speed and modulation.
What makes a difference is the obstacle course of circuit board
traces, connectors, adapters, test switches, pigtails, and coax.  Such
losses vary between perhaps 1dB for receivers with very little between
the receiver and the antenna, and 5dB for some rats nests with lossy
circuit boards.  To put it in perspective, 6dB loss cuts your range in
half. 

However, the biggest effect is from board and chip layout noise.  The
way sensitivity is measured is by sending random data and measuring
either the bit error rate (BER), or the packet error rate (PER).  They
are related but not neatly.  It's easiest to measure PER.  For OFDM,
10% PER is commonly used.  That's 10% of all packets sent (at the MAC
level) arrive with errors.  All of these errors come from normal
receiver noise, but there are ways to make things worse.  Rotten board
layout, excessive noise coupling across the chips, and locally
generated garbage all add noise which will affect the sensitivity.

Of course, field testing is the ultimate determination.  However,
there's a problem.  There's no easy way to do a one-way receiver field
test.  One could put an overwhelmingly strong transmitter at the
receiver under test, and assume that the other end will always hear
the acks.  However, most test are done with the 4 unknowns (2
xmitters, 2 receivers).  One never knows which end craps out first, or
whether the transmitter or receiver is lacking.  There are plenty of
other error sources in field tests limited by the test location.  For
example, some receivers are more/less sensitive to reflections and
multipath.  If the test were conducted "down the street", reflections
off the road will cause all manner of erratic results.

Jeff Liebermann wrote:

It might if it included the wrt54g.

You'll have no argument from me there. If we had some reasonable figures
it would make it possible to work out by just how much it would be worth
increasing the power since I would expect you actually want to balance
the system such that both the router and the clients have a similar range.

Mads Bahrt <mads_ba***@hotmail.com> wrote in
The WRT54GS is probably a better choice since it has more Flash Memory and
RAM.

You can raise the transmit power on both the WRT54G and GS model to 251mw!

Show quote Hide quote WOW 251mW is a lot of power in the UK, Infact with a 3dBi antenna its a
whole 400mW too much. I like it.

Show quote Hide quote The wrt54g might do 251mw but the radio will crap out prematurly. I
read some test
that 56mw is about all it can handle with long term reliability as a
factor. Now you may put some
extra heat sinks and fans and all on it and it may last longer.

I was having trouble getting signals around certain areas of my house and
yard, so I bought a Hawking Signal Booster (which I have turned up to
500mw), connected it to my wireless router, and put a 6dbi Hawking antenna
on the booster. Let me tell you - it works fantastic at enormous distances
through cinder block walls. Booster was about $100 and the antenna was about
$40

Show quoteHide quote

Show quote Hide quote WOW thats 2W of Power, could do some real damage with that. In the UK, i
would get a good slapping for that, (If caught)
Show quoteHide quote

Kick ass output to be sure - hide it well

For your reference, you can use a regular antenna with the signal booster
and it has three settings 100, 300 and 500 mw so you do not have to be as
extreme as my setup.

Check it out at http://www.hawkingtech.com/

Show quoteHide quote

Show quote Hide quote Shame you cant get the booster seperatly, they only sell it with the AP, or
PCI card

Show quoteHide quote

Although their website indicates otherwise, you can buy the components
seperately. Any number of computer stores or places like Office Depot sell
them individually. You do not need to buy bundled sets that include pci
cards or access points, etc.

For example:
http://www.officedepot.com/txtSearchDD.do?uniqueSearchFlag=true&searchTxt=booster
http://www.officedepot.com/txtSearchDD.do?uniqueSearchFlag=true&searchTxt=antenna&x=12&y=7


Show quoteHide quote

If that doesn't work - buy it from Amazon in the States - they'll ship you
one although it will probably cost you more than if you can source one
locally

http://www.amazon.com/exec/obidos/tg/detail/-/B00064FXL6/qid=1111690898/sr=8-11/ref=sr_8_xs_ap_i8_xgl23/104-9591676-4415130?v=glance&s=electronics&n=507846


http://www.officedepot.com/txtSearchDD.do?uniqueSearchFlag=true&searchTxt=booster
http://www.officedepot.com/txtSearchDD.do?uniqueSearchFlag=true&searchTxt=antenna&x=12&y=7
Show quoteHide quote

Yes, already tried Amazon USA. No longer stocked. Amazon UK, never heard of
it. Not available in any UK shop, as its technically illegal in the UK.

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=48700&item=5761434098&rd=1

That will cause injury if used wrongy. Imagine this into a 24dBi Parabolic.
OOOOOCCCCHHHHH

36KW EIRP. Enough to instantly cook yourself

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Satellite to Outbuildings
www.freeantennas.com