Colin, You are correct. This one I think just crunches the basic numbers and gives you a text output of the distance. Dave Marthouse N2AAM [log in to unmask] On 1/2/2016 3:47 AM, Colin McDonald wrote: > that's a bit of a tall order if you are looking for something that gives > some kind of textual representation of the lines and colors on the map the > way most calculators do. > What kind of info would you want from this kind of calculator? Where you > would enter coordinants of each station and then ask the calculator to spit > back a yes or no answer to weather this is a practical communications path? > The way all the calculators that I know of are set up is to show a foot > print map, and different color representations of fixed station, mobile and > handheld coverage out from a specific point. > I'm not sure anything exists that will give you some kind of text feedback > if you plug in a fixed point or something and tell you what the max range > is...there are allot of variables involved in that such as turraine, height > of the transmitting antenna and height of the receiving antenna, power > output, antenna gain and of course frequency. > Altitude, weather and humidity also play factors in VHF and UHF line of > sight communications. In perfect conditions, line of sight is nearly > unlimited on both frequency bands. > IE satellite communications is essentially line of sight without any RF > sucking obstructions and those are up to 13000KM away. > > > 73 > Colin, V A6BKX > -----Original Message----- > From: Jim Gammon > Sent: Saturday, January 2, 2016 1:29 AM > To: [log in to unmask] > Subject: Re: Accessable VHF/UHF Line of Sight Calculator > > Oh thanks Dave, I just couldn't imagine what kind of calculator > it might be. I was thinking it was a hardware box like a > Calculator you do math with. 73, Jim > > ----- Original Message ----- > From: Dave Marthouse <[log in to unmask] > To: [log in to unmask] > Date sent: Sat, 2 Jan 2016 02:48:58 -0500 > Subject: Re: Accessable VHF/UHF Line of Sight Calculator > > Jim, > > This calculator will plot the line-of-sight signal distance > between two > stations on VHF or UHF. In other words the typical non-enhanced > communications path over which the two stations can have good > reliable > communication. > > > Dave Marthouse N2 > [log in to unmask] -- Dave Marthouse [log in to unmask]