Originally Posted by
Light Dependant Resistor
How wrong you are, 0v in the Crown iC150 is not zero volts as stated, as 0v is always in series
with C40. Connect 2 capacitors in series you get voltage at their junction... no mystery to that.
C40 is on the schematic is a capacitive connection to chassis ground,
hence a zero volt reference up to the currents involved with a preamp.
Crown's mistake was to take the floating ground concept a bit too far by relying on capacitors
alone. Two diodes should retain Crowns concept and allow connection at a semiconductor junction
at the same time, allowing residual voltages to properly dissipate.
Cheers / Chris