how can i boost the range on these radios?

CRAZYIRISHMAN121 · Post by **CRAZYIRISHMAN121** » 20 Sep 2008, 19:06

Hey guys i found these 30 year old 2 way radios a few years ago and i would like to know how i could boost the range on the tranmission the frequency is at 27.350 Mhz with a RF output power of 500mW here are some pictures

if any of you guys know how to do it plz let me know !

Prime · Post by **Prime** » 21 Sep 2008, 12:58

Ok, sheesh, those look ancient. The frequncy and amplicifcation probably determine the range. If you amplify the signal, you can probably boost the range.

I'm no expert though

WAJeff · Post by **WAJeff** » 21 Sep 2008, 13:00

World War one FTW

Prime · Post by **Prime** » 21 Sep 2008, 13:10

g0ldback wrote:World War one FTW

Lol not quite. Sony is post second world war

CRAZYIRISHMAN121 · Post by **CRAZYIRISHMAN121** » 21 Sep 2008, 13:14

hahahahahahaha they not that old

but @ Prime that is right what you just said but my idea is to make some sort of amp like sound amps but have the ANT wire runing into a Transformer with a 9V BAT but does someone realy know how i can do it

Prime · Post by **Prime** » 21 Sep 2008, 13:32

CRAZYIRISHMAN121 wrote:hahahahahahaha they not that old but @ Prime that is right what you just said but my idea is to make some sort of amp like sound amps but have the ANT wire runing into a Transformer with a 9V BAT but does someone realy know how i can do it

You need a signal amplifier. I don't think an audio amp will work at those sorts of frequencies. I have a book on building FM transmitters, i'll see if there is a suitable amp in it

A transformer won't affect the power, if anything you will have major problems because you are changing the length of the antenna. you'll get inductive and resistive losses. Inductive losses go up with frequency.

CRAZYIRISHMAN121 · Post by **CRAZYIRISHMAN121** » 21 Sep 2008, 13:46

thanks bud ...but i am sure there is someway of doing it !

WiK1d · Post by **WiK1d** » 21 Sep 2008, 17:02

I just want to ask, why? You can buy a pair of 10-12 mile compact radios for like R500-R700.

Prime · Post by **Prime** » 21 Sep 2008, 17:08

WiK1d wrote:I just want to ask, why? You can buy a pair of 10-12 mile compact radios for like R500-R700.

I had considered asking that myself but its the same with modding. You could buy an awesome computer case for a few grand or Mod one and it will probably cost you more.

WiK1d · Post by **WiK1d** » 21 Sep 2008, 17:09

Prime wrote:
WiK1d wrote:I just want to ask, why? You can buy a pair of 10-12 mile compact radios for like R500-R700.

I had considered asking that myself but its the same with modding. You could buy an awesome computer case for a few grand or Mod one and it will probably cost you more.

No, this isn't the same. A nicely modded case is usable, these bricks, are not.

CRAZYIRISHMAN121 · Post by **CRAZYIRISHMAN121** » 21 Sep 2008, 20:04

WiK1d wrote:
Prime wrote:
WiK1d wrote:I just want to ask, why? You can buy a pair of 10-12 mile compact radios for like R500-R700.

I had considered asking that myself but its the same with modding. You could buy an awesome computer case for a few grand or Mod one and it will probably cost you more.
No, this isn't the same. A nicely modded case is usable, these bricks, are not.

@ WiK1d there is no point of doing it i just want to see if i can do it with these "bricks" but the we once got about 3KM out of them

Freakazo · Post by **Freakazo** » 21 Sep 2008, 20:49

go to opencircuits.com and search for a circuit that boosts radio signals or something

Samaya · Post by **Samaya** » 22 Sep 2008, 17:01

The first and probably the easiest way to get better range is to give those radios a better gain antenna. Look for a company called Webb industries, they should be able to help you out. Only other thing you could do is connect a RF Power amp to the output stage with a greater output than what you already have but then limiting the input to that amp with a set of attenuators so you don't blow the input stage <- very expensive...

UrBaN · Post by **UrBaN** » 22 Sep 2008, 17:08

There are cheaper places then Webb Industries, but yest they could do it.

Seriously though, the amount of money you will spend for that negates the purpose completely. May as well get a decent set of CB radios and study up on Ionospheric deflections if you want real range..

CRAZYIRISHMAN121 · Post by **CRAZYIRISHMAN121** » 22 Sep 2008, 19:22

were can i buy a CB radio in south africa?

WiK1d · Post by **WiK1d** » 22 Sep 2008, 19:53

Have a blast

http://www.jump.co.za/category/electron ... adios/237/

Prime · Post by **Prime** » 22 Sep 2008, 20:05

CRAZYIRISHMAN121 wrote:were can i buy a CB radio in south africa?

Don't you need a licence to operate them?

CRAZYIRISHMAN121 · Post by **CRAZYIRISHMAN121** » 22 Sep 2008, 20:09

NO!

UrBaN · Post by **UrBaN** » 23 Sep 2008, 09:08

CRAZYIRISHMAN121 wrote:NO!

Actually....yes, as far as I know you do...because you have to have a call sign so that you can be identified.

Still, not too difficult to get one...hell I could even give you one to use

CRAZYIRISHMAN121 · Post by **CRAZYIRISHMAN121** » 23 Sep 2008, 15:11

ok cool

markman · Post by **markman** » 23 Sep 2008, 15:33

I am in the two-way radio business and you are welcome to pm me with any queries.

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