Use a resonant antenna and don't use an amplifier.
If you amplify crap - all you will have on the other end is a bigger pile of crap.
Many people tries to overcompensate for a lack of antenna by using a amplifier.
Antenna tuners / trickers, does not make the antenna resonant, it just tricks the radio into thinking that the antenna is resonant..
Sounds like you have a antenna problem...
www.hypowerantenna.com
Try their ocfd - 80 meters..
It will work everything from 440 mhz to 80 meters, ex 15, 30, 60 - since they are not a harmonic of 10 / 20 / 40 meters..