All,   Since there are a lot of different threads now discussing the different ways to upgrade the Lynx’s power regulation circuits, I thought I’d sum them up here.   Background:   The Lynx has a built in switching regulation circuit that converts the 9V from batteries or AC into 5V for the system to use. There are few key components that make this circuit work, including a MOSFET (Q12 on Lynx II, Q11 on Lynx I), and a Zener diode (D13 on Lynx II, ZD1 on Lynx I). When the MOSFET fa