Long Range Walkie Talkie

www.mcgyver.com

2007-07-14 11:56:32 by evil dude technoid

Using normal walkie talkies and a special switch, I made a long range wireless camera trigger that can fire a remotely mounted camera at distances ...

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

2008-08-10 06:38:50 by sureshbabusintst

Price: $79.99

22 channels each with 121 privacy codes for superior interference protection
11 weather channels (7 NOAA) with alert features
Pair of two-way radios with up to 35 mile range
VibraCall vibration alert or 20 different call tones
iVOX hands-free communication without the need for an audio accessory

Army surplus stores.

2007-06-14 10:29:19 by GARY E

Price: $59.99 $42.61

Pair of two-way radios with up to 23 mile range
11 weather channels (7 NOAA) with alert features
22 channels each with 121 privacy codes for superior interference protection
iVOX hands-free communication without the need for an audio accessory
10-hour alkaline or 8-hour rechargeable battery life

you can get, Whats the best long range you can buy..

the best will give a good range of a few miles, though will have trouble in built up areas or where there are serious obstructions like hills or cliffs in the way. They are seriously expensive though!
Have a look at this one (£190 for one, not a pair!) on amazon
http://www.amazon.co.uk/exec/obidos/ASIN /B000A63IVC/?yah.007-21

Alternatively if your budget is a bit tighter these ones are pretty good and have a range of about a couple of miles

http://www.amazon.co.uk/exec/obidos/ASIN /B0007VZ6WE/?yah.007-21

2007-07-15 13:49:24 by Martin K

No problem with the brand! Almost any work fine.
But... how much it`s long distance? 1 ... 2 ... 3 miles?
In the city with a Handie if you get more than 1 mile you win the lottery! Think about 2 to 3 or maybe 4 city blocks. It`s a real distance to be covered with a radio that put out less than 1 watt into the antenna. BUT! if you get a radio with 4 or 5 watts and get a very well matched antenna you can win more distance. Good luck!!

2007-03-09 21:44:15 by Nablus