I am DUMB when it comes to these "NEW" technological wonders in radio amps....HOW can I determine what type of amp and how much minimum and maximum dead key from each particular radio to use on the proper amp...I am told to put in no more than 1 1/2 DK on this and then, no put 4 to 5 watts DK for the same radio...yet no one will tell me WHY and WHAT determines the amount and what to look for when buying an amp for a particular radio. IE one radio will dead key from 0 to 20 watts, depending on how I set the RF Variable. Another one I have will DK no less than 15 watts with max 150 watts...I know I won't need an amp on this one much if at all but I want to know the reasoning behind this and in layman's simple terms PLEASE....Thank You all for any good information you can give to me...I am so darned confused by all these people who obviously do not know what they are talking about....