rcamp, the point was that this isn't engineering and 100% accuracy isn't required. Hence the comparison between types of meters. Our club doesn't require 100% accuracy, just a reference, something to show members an indication of sound levels and a way to identify the obviously too loud planes to members who say things like "How can you say my plane is too loud when there is not a reference to go by" If the $49.00 Rat Shack meter is good enough for the AMA, and the AMA guidelines are in place on how to perform the test using that meter, (and they are) then I am sure that it is good enough for us. I appreciate your viewpoint but our needs are more then satisfied by the one I purchased.

By the way, out of the box & measured against a lab standard, it was within +/- 1 db from 75 to 110 db consistantly. No adjustment required. Good enough for me.

*edited 'cause I spelled your name wrong.*