Posts Tagged ‘amateur radio’

Radio Repeaters Extend the Range of VHF and UHF Two Way Radios

To get the maximum possible range for a radio transmitter, the radio's antenna should be up as high as possible. That is why professional radio installations, business, government agencies, police fire and emergency services all have their radio antennas placed up as high as possible. And they often use radio repeaters as well.

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Be the first to comment - What do you think?  Posted by Admin - July 11, 2010 at 06:35

Categories: Long Distance Radio   Tags: 2 way radio, ACMA, amateur radio, cb radio, duplex channels, emergency radio, fcc, frs radio, government radio, ham radio, longer distance radio, mobile radio, portable radio, public service radio, radio repeaters, radio towers, simplex channels, two way radio

Long range, handheld radio question

How do I set-up a long range, portable (handheld) VHF radio system?

I have several questions on how am I going to set-up a portable vhf radio system. I am really not that into amateur radio.

1. I’m planning to buy a 2.5w Kenwood TK-1118 portable VHF radio
- what is the coverage of this radio if id like to communicate with another portable radio of the same unit?
- is there a way for me to extend the coverage by changing the antenna or something?
2. How do repeaters work?
- I have read somewhere on the net that if you are on an area that has a repeater on it, the transmit/receive coverage of your handheld will be wider. In that case, should I also be on the same frequency as the repeater for this to work?
3. Communicating with the a base unit

- I have a base unit at home, 80w VHF. I seldom use this but it has a really long antenna. let say if im 20km away from that station, will I be able to contact that if I am using the Kenwood 2.5w portable VHF radio?

I will appreciate all of your answers. Ill be glad to talk to someone over the yahoo messenger to make each detail clear. Here’s my id. rnld(underscore)1 .. again, Thank you very much!
additional question:

How far can I communicate with a 75w VHF mobile base (installed on a car) if I’m using a 2.5w portable handheld? (note: point to point connection, no repeaters or something, straight handheld to mobile base with 5 feet antenna)

2 comments - What do you think?  Posted by Admin - July 23, 2009 at 01:05

Categories: Radio Q&A   Tags: amateur radio, antenna, Kenwood portable, mobile base, portable radio, radio system, repeaters, vhf radio

Homebrew a Half-Wave Dipole Antenna

Here is a simple dipole antenna that costs very little to make and which can built and put up in a day. And it helps if you have two or three treees or supports to hang the antenna from.

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4 comments - What do you think?  Posted by Admin - April 3, 2009 at 02:21

Categories: radio antennas   Tags: amateur radio, cb antenna, dipole antenna, half-wave antenna, Half-Wave Dipole Antenna, ham antenna, ham radio, homebrew, shortwave antenna, two way radio