Hi guys just wondering where i can get a booster from and what it does.

I installed a uhf aerial on my house for freeview HD it works but the signal on the channels are quite low, Channel 33 has 34% signal strength Channel 35 has about 15% signal strength and channel 37 has about 9% signal strength.

I am in wanganui i do not have line of sight of the towers but i have aligned it the best and this is the best signal strength i could get.

What do i need to make the signal better.

Currently i only have 1 tv plugged into it but i would like to add a second if possible?