RC Radios, Transmitters, Receivers, Servos, gyros Discussion all about rc radios, transmitters, receivers, servos, etc.

help , calculation

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Old 05-28-2003, 05:08 PM
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leectus
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how can i calculate the distance of a certain frequency transmitter . for example 75mhz is available for the controlling of the distance of 100 metres . can anyone tell me . thank u
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Old 05-28-2003, 09:44 PM
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Steve Lewin
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The maximum range of a radio has almost nothing to do with the frequency. It is affected by the power output and how efficient the receiver front end is...at any frequency.

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Old 05-29-2003, 03:00 AM
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Lynx
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Higher frequencies are more easily absorbed by obstacles. Lower frequencies have a higher noise floor though because the earth is noisy in the low RF bands. All of this is pretty irrelevant to RC'ers though. Power is more important, RC's limited to 3/4 watt I believe which is enough for line of site (much more than 100 meters) but your surrounding environment is more important, natural/artificial sources of RF noise are a problem more than the transmitter frequency or power is. There is no way to substantiate this. RF mechanics propagation is at best, a good guess.
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