hi,

is it possible to boost a walkie talkie's range in transmitting and recieving ?...
extending the antenna ? other amplifier ?

 

You probably need hack the hardware circuit.
It is illegal to boost the power since you might jam other wireless traffic, e.g. fireman's channel or police's channel.

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F.N.

 

but in our contry they have a special frequenti that they work on so we can't cross them

 

Even if you are not on the same frequency you can interfere with their communications by desensitizing their receivers. Fergeddaboudit.

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We never have time to do it right; but we always have time to do it over.

 

A walkie talkie produces ‘energy’ at the frequency you are transmitting on. Most of its power is at 1X. It also transmits at 2X, 3X, 4X ….. A small amount of power is transmitted at even 5 times your frequency. If you mess with your walkie talkie you could get some more power at 1X. You will defiantly get much more power at the harmonics. You could easy send 1/3 of your power out on a harmonic that lands in the middle of the police band. Good luck when type show up at you door.

 

ok then then i will let it like it is now

 

Walkie-talkies are for children.
In North America we can buy very good ones made for adults that have a very far range and work very well. They are inexpensive.

Attached Images

GMRS radios.JPG (24.8 KB, 16 views)

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Uncle $crooge

 

i know , but how come those wouldn't cross service frequenties , and the ones in belgium are secured ...(service ...)

 

They are correctly designed, and meet a low power licence free specification, you're not allowed to put amplifiers on them.

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

 

In the US, GMRS is not license free. See 47 CFR 95.179. But as usual, OP has chosen to conceal location in their Profile. Even a continent would be helpful.

 

I thought the little walkie talkies that Audioguru posted the picture of were licence free?, they are in the UK, which has far stricter radio regulations than the US.

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

 

FRS (Family Radio Service) and GMRS (General Mobile Radio Service) radios are similar. A quick scan of the rules suggests that FRS is unlicensed, low power and GMRS is a licensed higher power version. It appears that both are for family use. The frequencies for both are about 460 mHz - with overlap on a few channels. It appears that one can purchase a tranceiver approved for both FRS and GMRS. I'd expect that device to require a license.

Until this time I had never realized that the FCC's intended use was for communication among family members (per FCC website). Seems that the FRS and GMRS radios are marketed without mention of this.

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stevez

 

it's used profesionaly on almost every building site through out the world

the problem here in cambodia is the licencing fee, not that cheap but still easy to get things going in comparing to Laos

negetive point of having a building project in a comunist country is that wireless comunication (telephone excepted( get scaned also)) is deu to the cost and paperwork in those countrys almost imposible to have

not nice when you building a 12 story building, makes you very tired walking the stairs

Robert-Jan