Tests
I did some testing with an Intaride A80 and a kenwood 3107 last night. The results were confusing... I'll explain why...
The format of the test was a basic transmit and receive between the two units with an increasing distance and obstacle range between them.
In a hand hel configuration, both units had clear reception of the other in an urban environment up to a 600m range with at least two streets of houses providing the obstacles.
Beyond that distance or with the introduction of another row of buildings the reception of both units deteriorated, although initally speech was still clear enough to understand there was intermitant "noise" in the back ground of each transmission.
Eventuall (at the 800m mark) the reception was poor enough to be difficult to make sense of the speech.
Confusing because the 3107 should have been transmitting at the advertised (but illegal) 4 watts, whilst the A80 was still on it's unlocked .5 watt setting.
I will carry out the tests again tonight, but this time, when reception deteriorates, I'll up the power output on the A80 and see if it can manage any increased distance/obstacle.
For interest the Intarides cost about £150 each including either battery or bike power and Autocom patch leads. The Kenwood work out at about £100 each for the same setup.....