On 8 Jan 2010, at 21:09, Grant wrote:
I'm extremely sceptical of these cheap external aerials. If it were
expensive one from a specialist supplier then I might have higher
expectations, but I'm pretty sure a customer of mine used one
yours, and they used to use a book to balance it at an angle to try
reception. This was between offices on adjacent floors, almost one
above the other (surely less than 20' sideways).
Can you recommend a specialist supplier, especially in the US?
I had to google for recommendations to pass on to you, but found:
I've had great results mesh networking with 15dbi omnis
available from http://www.wlanparts.com. With line of
sight I can connect to these from over 1/2 mile a way with
my laptop. Watch your transmit power as with high gain
antennas its easy to venture in to illegal power levels.
See: http://www.rflinx.com/help/calculations/ Remember high
transmit powers only increase range if both ends increase
their power. In most cases increasing power does little
good at just one end of the link.
Indeed wlanparts.com would appear to be the kind of folks I had in
mind (they look to me like the kind of people you could email for
advice - if you were to email them the question you originally posted
to this list, maybe they could suggest a replacement?) but it might
also be worth searching openwrt.org & it's forum for aerial or antenna
and take a look at few more of the results there (i.e google "aerial
or antenna site
penwrt.org" will include the forums).