If you don't have the A99 yet, check into the 8101B antenna from the same company. I am told it works on 40 and 80 but better on 20, 15 and 10. A dealer has told me the antenna has some problems lately, so check with a dealer first. Look at this site for more info: http://anttron.tripod.com
As an alternative, look into a 5BTV vertical. I have been using one of those for over twenty years. The SAME one!