antenna Amp Booster?

[Guest]

Hi guys:i got a 10db antenna amp booster but it only covers Freq.50-450MHZ
and i guess only good for VHF,i got it in the flee market for 3 bucks,i did not see the frequency cause the price sticker was covering it,so i guess waisted 3 bucks ,unless i come up with a change in the circuit if that's possible!
anybody knows if there's a way,thanks in advance.