My A99 is almost a flat 1:1, not too much spread between 1 and 40 on the CB dial. I had a A99 back around 1989, I used it mounted about 12' off the ground on the side of the house. The one I have in the tree gets me pure solid modulation in the canyons where I live. I can get up the canyon to my water source or I can go cut wood or ride horse and just take my hand held. I have talked to Southern Ca. and as far as Mississippi when the skip is in. Getting the antenna the highest spot I can give me the coverage I need. I can talk to Eureka Ca. which is about 30 air miles away but it is faint. When I get my beam up I should have cleaner transmit and receive. I only have 2 contacts on the coast but if I need help and the cell won't work then it is the radio is what will get me there.