A long time ago, PCBMan wrote the following: > The 'good' emate has a 1N713 in it. This is a 9.1V zener. That's much > better. An Apple supply @7.5V nom. won't cause the zener to conduct > under normal conditions. I'd strongly recommend not to use a zener with a voltage less than that. Frank -- Newton software and hardware at http://www.pda-soft.de