What is a VHF Walkie Talkie?
A walkie or a mobile radio is a portable, handheld two-way device that is used to communicate wirelessly. The communication is aided by radio waves that are transmitted on a shared or single frequency band. The radios can either be very high frequency (VHF) or ultra high frequency (UHF)
Walkies look a lot like the cordless mobiles although they also have a body that has a microphone, speaker, and antennae. They are battery powered transceivers; thus they can send or receive radio messages. They are a two-way radio communication device and are common for public safety officials such as police.
A mobile radio is made up of several parts:
- A transmitter or receiver that sends or receives radio waves, hence the name two-way radio
- A loudspeaker that also acts as a microphone when you talk into it
- An LED indicator that shows when the channels are busy
- Transmit call tone that sends a tone signal to other radios on the same channel when you want to talk.
What is the difference between UHF and VHF radio frequencies?
VHF and UHF have their pros and cons depending on your application. Therefore, Your suitable choice will depend on a number of factors. For instance, UHF does not travel as far as VHF, but it has a higher bandwidth occupation.
The radio waves included in this range from 30 MHz to 300 MHz. For example, walkies using the VHF are Kenwood TM-281A VHF mobile two-way and the Kenwood TK-2170 VHF FM transceiver, which are both portable. VHF frequencies are less likely to be affected by noise, and other electrical equipment interferences.
Some popular Kenwood brands of walkie-talkies include:
- VHF TK-2312 portable handheld radio
- The new NX-220 K3 NXDN digital with FM analog 136-174 MHz
- NX-700K two-way radio transceiver NEXEDGE VHF with 136-174 MHz
What do I consider when buying Kenwood walkie talkie?
- Frequency range or bands (VHF, UHF, GSM, or dual band) - Selection of the wrong frequency can be detrimental especially where there are a number of portable radios. When other radios are not a concern, then UHF is a good option and vice versa. The parts are also vital. Some models like the NX-700 have separate parts for the microphone and the transceiver.
- Range - The modern types of walkies have a repeater that can extend transmissions so that they cover a long distance. For example, the Kenwood Tk-3207 16CH UHF has a range of 5 km.
- Output power - A typical two-way radio has power ranging from 0.5 to 5 watts. Some walkies have up to 10 watts of power to achieve long distance range communication. For instance, the TK-790 high power public safety mobile radio. Some mobile radios use electric power and therefore they need to be charged for use. An example is the TK-2180.
- Batteries - A majority of these mobile radios either have NiCad, NiMH or Li-ion. Nickel-cadmium has been around for a long time and has a long life expectancy. Lithium-ion is the most expensive of the three. It does not get a memory burn and is the lightest, which makes the mobile radio lighter and more portable.
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