I don't know the reason but I know that the 92AD gets real hot if you talk to long on Digital. Each level of heat drops the wattage untill it will not transmit. So you have to make your comments quick and to the point. As for the reason I don't know that. I lay mine on the cooling pad that I use for my laptop. Now when I am away from home I am just out of luck until I get a portable fan.,
73's James KDØAJZ
