NewFeatured tool · Terrain & height

ALHP – Antenna Location & Height Projections

ALHP projects your JK model’s elevation pattern and gain at your real tower site, using real terrain along your beam heading. It covers single antennas and stacks of up to four, and compares the result with the same antenna over flat ground.

Open ALHPCovers tower locations in the United States (lower 48, Alaska and Hawaii), Canada, Mexico and the Caribbean.

Your site
Flat ground
Illustration

Calculators

We have added some calculators here to help you get started or validate some of the Mast and Guy clearance calculations.

Please use these calculators at your discretion and double-check your results with other sources or methods.

Calculator 1

Mast

Mast Calculator

Please use this calculator to calculate the survivability of your Mast. There are a variety of masts, such as Chromoly, DOM and Schedule 40/80 masts, used by radio stations. We have provided a standard/conservative rating on the yield PSI. You can choose to alter these at your discretion and for calculation purposes.

Pay close attention to the “DEFLECTION” number. This shows how much the Mast moves laterally during high winds. The higher the number, the more the Mast moves, whipping around.

Open the Mast Calculator

Calculator 2

Tower guys

Guy Clearance Calculator

Please use this calculator at your discretion to calculate your tower guy clearance for your antennas.

Also, double-check the results with other methods to validate the turning radius available to you.

Open the Guy Clearance Calculator