Gear

IN Motorola T5522 Talkabout Radio Set 3 km range will be provided sois it with this 3 Km range ok or may be getting prolbem up to that far level... ?......because of as per my knowledge this been very wide range, so may the disturbance problem will arise up to thare......!

Given the Frequency and Power output of the Consumer Level PMR radios you will find the 1/10th rule applies in he real world in normal use in wet woodland or Granite strewn hills you can pretty much guarantee that and other people transmitting on the frequency you are using 300-500 mtrs is more the norm even on the 8Km units the power is not much more and 800 mtrs - 1.2Km will be more realistic the only time you may get the full range of these radios will be line of sight from summit to summit.

and yes ive been using radio communications for a fair few years now so this is from using not googling

yeah, zooma as per my knowledge 3 km the bigger as well as the good one....but now from the more clarification from the actionman what happen in the reality.....

Thanks buddy this been much more healthy knowledge from my side....!

PMR radios in the UK are no more than "toys" and are not intended for "serious" R/T communication work.

They are very limited by being on the UHF band which is a short wavelength which needs a larger output wattage for any usable distance.

By virtue of the fact that they do not require a license, their output is limited to 1/2 a watt which serverly restricts their range.

A good engineer could "tweak" the output  (illegally) to slightly higher wattage, but that would have an adverse effect on the battery life.

For any "serious" R/T communications in the hills, you should really be considering buying or hiring professional licenced radios in the HF or VHF bands.

Hmm PMR with UHF frequenties are "toys"? Nope they are most definetly not if used properly. If you keep in mind that the PMR's without the need for licences are limited in distances they can be used for serious ventures as well.  As long as you use your head... You never should rely for your safety on technology, it helps but that is all.

You must always make sure you do not venture far enough from eachother to loose contact or make a good schedule when you expect to be out of range and when in range again and make your route known (for example half of the party rounds an obstacle right the other half on the left). This way if something goes (the expected time is long overdue) wrong a search party can easily move in a direction where they can become quick in range again (route is known, expected time to be out of range etc.) 

I have used pmr446   since they become legal about 11 years ago or so for skiing, cycling and walking with groups that usually end up split up and I think they are very useful and very helpful. The  5522 and 5523 's have now been replaced  by a later model, i have the T7 ones at the moment,  that claim about 10k??  As others have explained they are generally line of sight, a couple examples of how far i have used them for are : From the top of Ben Nevis to the campsite whilst doing the 3 peaks Challenge to radio the driver at the bottom . Also recently the top of Glyder Fawr to Nant Perris (3 miles) both examples very loud and clear. Most of my walking mates have also purchased these now and wouldn't be without them. The only thing with the later T7 motorola is that you cant scan the sub channels like you can with the earlier ones, that is presuming Motorola haven't  realised this draw back and now corrected this on later models which means its harder to locate people in the time of an emergency as you would not know which sub channel they were on to contact them.

James

"Hmm PMR with UHF frequenties are "toys"? Nope they are most definetly not if used properly. "

yeah zuma i agree with you the above that UHF "ultra high frequencies" not to categorized like as toys....but the use of it's is the imporatnat facor, how you can use that type such a resources on your way.....

You are completely missing the point.

The reason that they are "generally line of sight" is because they are in the UHF band, and anything using these higher frequencies are by the very nature of the band intended for very localised communication.

I am not suggesting that use of these 446 PMRs is frivolous, what I am saying is that the UK licensing authorities regard them as nothing more than "leisure toys," which is why they are restricted to 1/2 watt output which SERIOUSLY depletes their range.

Prior to the UK emergency services moving over to TETRA (a trunked cellular network service similar to the mobile phone network) they used UHF for hand held local communications, but the difference was that the sets were rated at 4 watts output, which gave them a range of around 5 miles.

The higher the frequency, the larger the output wattage has to be to transmit any distance, therefore a unlicenced 446PMR restricted to half a watt will ALWAYS be severely hampered by lack of range and therefore very unreliable for any SERIOUS use.

Anyone needing R/T communications as a SERIOUS tool in the hills needs to consider obtaining/hiring properly licenced VHF hand helds which rated at 4 watts will give a range of around 10 to 20 miles, and will (subject to localised conditions and by the very nature of the shorter wave length) also be able to transmit past most obstacles that 446PMR would find impossible.

Another and perhaps cheaper option might be to obtain a couple of 4 watt Citizens band hand helds.

They operate at 27 mhertz and therefore as they operate in the HF band (a very long wave length) they would by their very nature have a much better range than 446PMR!

Haven't you just retired from "The Bill!"

yea after crashing all them police cars......... unlike Graham Cole i am the real Tony Stamp and boy dont it get me into a bit of stick with various police forces,let alone the following questions they ask me