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Originally Posted by Assasin-uk
... Ive orderd my wireless nic card from ebay..
Link , It is running the Herms chipset and not the proxim one so hopefully it will be ok.. Comments? |
That should be fine.
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Originally Posted by Assasin-uk
... One other thing, the pci converter, on http://www.fab-corp.com/ website they show 2 types of converter.. a cardbus on and a generic ricoh one which one am i after for my new nic?... |
The Ricoh has the best compatibility, and since the ORiNOCO is a 16-bit card, it will be fine.
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Originally Posted by Assasin-uk
... The pig tail for this, i need an N type female right? ...
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Typically you need an MC (ORiNOCO) to N-Male pigtail. Although the Ebay link shows an antenna that doesn't require a pigtail at all.
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Originally Posted by Assasin-uk
... And when it comes to cableing... Whats the best low loss cable to use with this type of equipment? ive seen some LMR900 on fab corp again and it says "boasts an incredible 2.92 dB of loss for every 100 foot at 2.4 GHz!"
Is it my or is that alot of loss for 100foot? ...
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Actually that is VERY low loss.
Here's a quick repeference:
Attenuation (dB at 2.5GHz per 100 ft.)
Code:
LMR900 LMR400 LMR200 LMR100A
2.98 6.8 16.9 40.0
You can look up the full chart at the
Times Microwave site.
You probably don't actually want LMR900. It's really made for things like microwave or cellphone towers. It is almost 1 inch in diameter, and very had to work with. The connectors cost about $50USD (about £90 at the currect exchange rates)
each.
As any FYI, most WISPs typically never use more than LMR400.
All of this cable requires special tools. You really need the proper tools to work with this stuff, or you'll introduce loss when you attach the connectors. Can you do it with a jackknife, a pair of dikes, and a pair of pliers? Sure you can. You can also do surgery with those same tools, but either way you won't like the results.
Here's what you'll need:
- Crimper with a full set of dies
- Coax stripper
- Coax cutter
This will cost about $100-$200USD (£180-£360.)
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Originally Posted by Assasin-uk
... And last but not least the antenna..
I was originaly thinking of fitting some type of yagi on a rotator on my roof, but after reading about radial patterns and not being able to find a real high Db yagi im thinking of looking for the highest Db omni i can find..
I just want to make the best possible range i can from my static location without having nasa on my roof.. anyone know of a 20Db omni? or is this unrealistic. ...
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It's unrealistic. You might find one, but the pattern would be so flat as to be unusable. A 12dBi omni typically has a horizontal pattern of only 15º. A 20dBi omni would only have a pattern of 2º-3º. If this make no sense, look at page 18, Figure 1.12 of
WDDD, which explains this concept of omni patterns. The Antenna FAQ also has some information on patterns.
I'm not sure what you consider "high" gain. Here's a quick chart showing some typical gains for the standard antenna types:
- Omni: 3dBi to 12dBi
- Yagi: 8dBi to 15dBi
- Panel: 13dBi to 19dBi
- Sector: 13dBi to 19dBi
- Dish: 19dBi to 24dBi
Obtaining "super" high gain is impossible, or so impractical as to amount to the same thing. Just as an example: The Radio Telescope at Arecibo has a gain of about 70dBi at 2.5GHz, but you probably can't afford that.
