Equations to calculate range?

Oh, these this was the antenna I was eyeballing:

(I'd get two, of course.)

The Ham Radio folks know how to do this and there are charts in one of the handbooks. If youir numbers are sccurate you get genuine results.

Google for "pass loss calculation". There are all sorts of solutions. SOme may work for you.

No way today. Billing, taxes, one crisis, and a evening antenna project in the rain.

Start here: |

are at least a dozen posting in the last few months where I've walked someone through the link calculations. Any one of these can be used as an example: | it a try, post your calcs, and I'll check your work (later).

There are at least a dozen posting in the last few months where I've

Give it a try, post your calcs, and I'll check your work (later).

Thanks.

You got me pointed in the right direction.

I definetly will read everything, starting off there. I'm planning on weather-proofing and mounting the AP's as close to the antennas as possible, hopefully right on right on their "support structures", to minimize cable-loss as much as possible.

Wow, don't know if I'm doing the numbers completetly correct yet (I will be familiarizing myself), but some playing around is showing that 32 dBi gain gives much more range than I thought. I would guessing like maybe a mile and a half. LOL

Thanks, I'll google that and lurk around Ham radio sites as well!

> There are at least a dozen posting in the last few months where I've

> Give it a try, post your calcs, and I'll check your work (later).

Oh, pretty cool too, springboard'd from there to a site that calculates azimuth/elevations based on two Lat/Longs. Didn't even think about that. That'll give me an excuse to finally do something worthwhile with my GPS. :^)

I use a map, SA Topo! program, Delorme Street Atlas, Topozone, Google Earth, or anything else that gives Lat-Long. There are lots of web sites that will calculate distance:

's the easy part.

Next, you get to calculate the Fresnel Zone clearance to make sure there's nothing in the way. Minimum is 0.8 times the Fresnel Zone clearance. I suggest downloading and doing battle with Radio Mobile:

do the point to point freznel zone calcs, see: sure to use the SRTM maps and NOT the DEM/DTEM maps. This is a bit of a learning curve, but methinks well worth it. The nice part is that it's free.

Incidentally, I don't think you're going to like the 32dBi 5.7GHz dish antennas. The solid dish is about 3 ft across and weighs about 25lbs. The fiberglass radome doubles the weight. Add another 5-10 lbs in brackets. It took two of us on the tower to muscle it into place. Alignment was successfully accomplished after removing the feed and shooting a green laser through the feed mount.

antenna is not counterbalanced and will require a rather substantial mounting pipe.

I don't know the numbers, but based on my own experience and Jeff's "6dBi doubles the range" I'd have to guess that's achievable. Remember though that the Fresnel zone is quite wide at that range. You need not just line of site, but no obstacles in the Fresnel zone.