Every ham knows operating UHF & VHF allows wonderful point to point, close range communications, however, effective signal range can be another matter. With handheld radios transmitting with only a few paltry watts, and frequencies which travel line of sight, and often subject to scattering by obstacles like buildings, terrain or vegetation, the distances which UHF & VHF radios can get a signal out, can often be too limited. For the most part, most activity on the upper bands involve using signal boosting repeater operations, where each individual point is actually communicating to a powerful repeater, instead of the intended receive point directly.
It's a system that works like gangbusters. Repeaters allow UHF/VHF communications far past normal ranges...it's THE thing to do. But what of the lowly handheld which, for one reason or another, can hear the repeater, but just doesn't have the stuff to get a signal to the repeater? That's when you need to get cross... as in Crossband Repeat.
|Crossband capable Icom IC-2820H|
|Neat-o Diagram made by yours truely!|
So the next time you can't get your signal into the local repeater, don't get cross... just get crossbanded! '73 from KI4HEE