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Originally Posted by kithylin
Possible ideas: this card (already at 24.5dbi output) + 2 200mW/300mW powered amplifed antennas, possible 73.5dbi wardriving setup ?
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First of all, most amplifiers sold for Part 15 use contain internal regulators which are limited to the rated output, no matter what the input level is to the unit. This keeps people who don't know about RF from causing too much damage.
Secondly, that kind of output would be clearly illegal. Under FCC/Can regulations for 802.11 the maximum legal Point-to-Multi-Point (omni) use is 36dBm and Point-to-Point (directional) use is 48dBm*. Under most other regulatory bodies it's even lower.
Finally, 73.5dBm =
35,000 watts ERP, way past what microwave ovens put out (the typical microwave is 500W to 1kW). It's doubtful that such power loads could be sustained which causing some major equipment failures. I suspect that if you were ever able to actually cobble together such a rig, it would be about the last thing you'd see. At the very least you could kiss your eyeballs and gonads goodbye.
If you have a desire to use higher powered equipment, you should consider getting your Amateur license and learn what is possble, what is not possible, and what could be dangerous to youself and other people. Dave Anderson (KG4YZY) of Fab-Corp has a good page summarizing the Amateur limits here:
http://www.fab-corp.com/db.htm
*In theory you can go to a higher power level PtP, if you can find a higher gain antenna. However, but it's typically hard to find one over 24dBi.