Have a look at the MiniVNA Pro. Read the reviews on Eham. Cheaper than most and small enough to carry up the tower and use with and Android phone. http://miniradiosolutions.com/minivna Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ Owner - Operator Big Signal Ranch Staunton, Illinois email: bill at wjschmidt.com