Please give circuits to do long range walkie talkie..

Question

Please give circuits to do long range walkie talkie..

Answer 1

Please define "Long Range"   What distance do you need to cover? That will dertermine the frequency band, power requirements etc.  

Answer 2

In what frequency would you be talking about ..This question I raised would only affect the "long range" part of your question. But lets just use an example for all ...Lets say the 2 meter band is your choice. In most cases the operation of a small handheld transceiver will fall into the double digit wattage area as a maximum and could fall below one watt as a minimum. In the US we use a series of inter-connected towers that receive the signal and boost it on to the next repeater tower until its final destination is reached . Its a lot like a telephone system. That way a HHT only has to key the first tower with minimal wattage.

To increase your HHT  you would have to change the "final's" output wattage of the system. However when you do you'll see very quickly that your reserve (battery) is short lived . So you need to change the Ah (amp hour) rating on the battery system as well. Pretty soon this Long Range HHT weighs 5kilo and your arm hurts to carry it.

Sooooo----Instead of messing with the radio itself patch the output of the radio into an amplifier that is self contained and one that will boost your signal accordingly. THE place to find all this is in the AMATEUR RADIO HANDBOOK....google one up and buy it.. there are probably 10 responsible reasonable application within . Each one will be very similar to my explanation of the solution....Have a good one from the E