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That is for one station to horizon, if both stations have their antenna up at 60 feet it is different as i said above.
Result
Line of Sight distance (dl)
km 15.2669
Radio horizon - Service range (dr)
km 17.619
X 2 for both station.
So direct line of sight 30.5 KM and service range 35+ Km
In most cases running 100 watt and good 5/8 antenna range is a bit better in most cases, above are the worst case distances.
Line of Sight Calculator | Online Line of Sight Calculator App/Software Converter – CalcTown

Experimenting on 10 i found out the distances are mostly better, certainly if your antenna is free, no obstructions in sight, and then good signal reports are possible over a bit larger distances as calculated.
Maybe my 3000 feet radial field under my antenna's plays a role including good ground.
Anyway, that is what i see here daily on 10 with local qso's.
Not much difference between 10/11 there.

<blockquote data-quote="Justme" data-source="post: 776811" data-attributes="member: 6187">That is for one station to horizon, if both stations have their antenna up at 60 feet it is different as i said above.ResultLine of Sight distance (dl)km 15.2669Radio horizon - Service range (dr)km 17.619X 2 for both station.So direct line of sight 30.5 KM and service range 35+ KmIn most cases running 100 watt and good 5/8 antenna range is a bit better in most cases, above are the worst case distances.<a href="https://www.calctown.com/calculators/line-of-sight" target="_blank">Line of Sight Calculator | Online Line of Sight Calculator App/Software Converter – CalcTown</a>Experimenting on 10 i found out the distances are mostly better, certainly if your antenna is free, no obstructions in sight, and then good signal reports are possible over a bit larger distances as calculated.Maybe my 3000 feet radial field under my antenna&#039;s plays a role including good ground.Anyway, that is what i see here daily on 10 with local qso&#039;s.Not much difference between 10/11 there.</blockquote>

[QUOTE="Justme, post: 776811, member: 6187"] That is for one station to horizon, if both stations have their antenna up at 60 feet it is different as i said above. [SIZE=3][B]Result[/B][/SIZE] Line of Sight distance (dl) km 15.2669 Radio horizon - Service range (dr) km 17.619 X 2 for both station. So direct line of sight 30.5 KM and service range 35+ Km In most cases running 100 watt and good 5/8 antenna range is a bit better in most cases, above are the worst case distances. [URL='https://www.calctown.com/calculators/line-of-sight']Line of Sight Calculator | Online Line of Sight Calculator App/Software Converter – CalcTown[/URL] Experimenting on 10 i found out the distances are mostly better, certainly if your antenna is free, no obstructions in sight, and then good signal reports are possible over a bit larger distances as calculated. Maybe my 3000 feet radial field under my antenna's plays a role including good ground. Anyway, that is what i see here daily on 10 with local qso's. Not much difference between 10/11 there. [/QUOTE]

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