I believe that out to 15 miles or so you can treat the earth as "close"
to flat. No, it's not flat, but the difference is not worth talking
about. Beyond that, and you have to take earth curvature into account.
bp
<part15sbs{at}gmail{dot}com>
On 6/10/2016 2:05 PM, Ken Hohhof wrote:
So you are a flat earth believer?
*From:* [email protected] <mailto:[email protected]>
*Sent:* Friday, June 10, 2016 1:12 PM
*To:* [email protected] <mailto:[email protected]>
*Subject:* Re: [AFMUG] Downtilt Calculator
Seriously, take the height of the antenna divided by the distance to
the area you want to focus the energy.
If that is one mile away, and the antenna is mounted at 100 feet,
100/5280. = .189
Hit the ARCTAN button or the inverse TAN button and we get 1 degree of
downtilt.
TAN = Rise over Run.
Arctan = degrees of Rise/Run
To me that is easier and quicker than going on line and finding a
calculator web page etc.
With an HP calculator it is 3 key strokes in addition to the numbers.
*From:* [email protected] <mailto:[email protected]>
*Sent:* Friday, June 10, 2016 12:03 PM
*To:* [email protected] <mailto:[email protected]>
*Subject:* Re: [AFMUG] Downtilt Calculator
<snark>
Look for a button called TAN on your calculator.
</snark>
*From:* Brandon Yuchasz <mailto:[email protected]>
*Sent:* Friday, June 10, 2016 11:37 AM
*To:* [email protected] <mailto:[email protected]>
*Subject:* [AFMUG] Downtilt Calculator
Looking for a very simple down tilt calculation tool and I am
wondering what most of you guys are using. There has to be an easier
way then using math and my brain every time.
Best regards,
Brandon Yuchasz
GogebicRange.net
www.gogebicrange.net <http://www.gogebicrange.net/>
