walkie-talkie

Learned a little bit about two ways radio lately. I visits some forums, websites and ask dad about communication since he is working in that particular field.

Using walkie talkies normally need license because we are using the frequency to transmit wave except Personnel Radio Service at 477 Mhz in Malaysia. Every country had their own frequency for public usage. In US, this is called GMRS, FRS in Singapore and PRS in Malaysia.

Distance of transmitting is affected by a few factors: power output, antenna quality and frequency. Higher the frequency, shorter the distance and vice versa. "Repeater" is used to further up the distance of frequency transmission.

Cheap walkie talkie sold in town is majority illegal because they are not using 477 Mhz and some are more than 4Watts power. Walkie talkie offered by Aztech with SIRIM sticker is legal because it is programmed at 477Mhz and using 0.5W output. But pity it can't transmit very far, plus the effects of buildings and trees. "Spectrum Analyzer" is used to analyse the frequency used by certain radio.

For public to use walkie talkies, we should go to Communication and Multimedia Commission of Malaysia to take examination and obtain licences for Class A and B in order to communicate. We must also need Apparatus Assignment to use the radio equipments. These people obtained licences usually join Amateur Radio Club and participate in their activities.

This is all i can share with you guys. I can't guarantee everything i shared is true because I'm not an amateur radio user either... Hehe...