Hi guys Thanks to those that responded to my question regarding the VSI, it is now zero'd and works just fine. Along with the VSI, I also got an XCOM760 radio. I managed to get it powered up today to see if it worked properly. Well to say I was impressed is an understatement! This thing can pick up aircraft still on the ground at our local airport about 50 km away.This is with a dipole antennae that I made and taped to an old fishing rod, This is no big deal unless you know that I live at the foot of a mountain that stands between us. I have an old king valve set that can't even pick up the tower at the airport from here. I can't wait to get two headsets plugged into it to test the VOX intercom and the aux music input. Regards Dene Collett KR2SRT builder South africa Whisper assembler See: www.whisperaircraft.com mailto: av...@telkomsa.net