On the tmv7a I can reverse but I cant seem to find a way to change from plus to minus to simplex. Which buttons do I need for this? Ray T. Mahorney WA4WGA --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.768 / Virus Database: 515 - Release Date: 9/23/2004