K1 activates, K2 doesn't. Voltage across D4 = 0V (so that's where the problem is).
Q3 base voltage = 40mv (relative to gnd)
Q3 emitter = 25V
Q3 source = gnd
Can you confirm the correct Q3 base voltage?
I have moved the forum to an another web hotel and at the same time done some housekeeping. All zero-posters are removed. Feel free to register again.
This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.