i have a uniden pc68xl when I tune the tx cans for max power on 20, I'll have 4w key with 16w modulated. Then when I go to channel 40 or 1 I'll get like 1.5w with very little forward power. The rf meter on the radio also swings backwards on 1 and 40, and when on 20 operates normal. Is there something else that needs adjusting to even power on both ends of the band?