OK there is a "cute" little program that actually comes fairly close to calculating effective radio range based on height, power, line loss(has a cable database), and frequency. Add the cavity losses in with the line loss. Calculate the portable at 6 feet, unity gain, using worst case terrain type scenario. I will send it to you.
--- On Sat, 4/24/10, George <[email protected]> wrote: From: George <[email protected]> Subject: [Repeater-Builder] Re: how far To: [email protected] Date: Saturday, April 24, 2010, 8:43 PM ok the antenna is from cell site 14dbm 4-element in a plastic housing, the amplifier is 600 watts capable linear mosfet 8element hybrid splitters and combiners... but the power supply is up to 65 ampers at 24 volts, driven by a "C" class 130 watt amplifier. the antenna is not on a commercial tower (no luck here). 20 feet above the house. the line is heliax andrew semi-rigid. the repeater is in the attic and the line is 30feet. the duplexer is celwave doesn't like more than 450 watts in. --- In Repeater-Builder@ yahoogroups. com, kevin valentino <kevinvalentino@ ...> wrote: > > Any approximation would depend on the repeater antenna height and the terrain > of the area. > I would hate to see the price tag on an 800MHZ 450W amplifier :-) > I do mean literally "approximation. " Many factors come into play. Especially > at high frequencies. > The length and type of the antenna feedline, gain of antenna used, etc. > --- On Sat, 4/24/10, George <gueorg...@. ..> wrote: > > > From: George <gueorg...@. ..> > Subject: [Repeater-Builder] how far > To: Repeater-Builder@ yahoogroups. com > Date: Saturday, April 24, 2010, 7:24 PM > > > Â > > > > what is the range of a 800mhz handheld 4watts with msf5000 repeater 450watts > on the antena >
