Ok, got the KPA100 working today. Made contact with KB8ZYH in Ohio on 20m.. Everything seems to be working fine except like one of the posts earlier this week. No sidetone. Any ideas. I did the A/B mods (sidetone) on the Rev A board, rechecked them and they appear to be ok. John KE4D K2 #2985 Cannonville, UT for the summer www.TheRollingHome.com