13.12.2005, 11:38 PM
Rumgucker:
I am a bit unsure of how to describe my problem, couldnt you please draw how the earth is to be drawn for a stereo amplifier with common power supply where the earth from the pre amplifier is common to both channels?
In my imagination at least, the only way to accomplish this is to build both amplifiers on the same PCB with both amplifiers sharing the same star earth (and to take a common input earth directly at the star earth), so every part of both amplifiers stay on the same potential to avoid ground current circulating at the inputs through the pre amplifier.
I am a bit unsure of how to describe my problem, couldnt you please draw how the earth is to be drawn for a stereo amplifier with common power supply where the earth from the pre amplifier is common to both channels?
In my imagination at least, the only way to accomplish this is to build both amplifiers on the same PCB with both amplifiers sharing the same star earth (and to take a common input earth directly at the star earth), so every part of both amplifiers stay on the same potential to avoid ground current circulating at the inputs through the pre amplifier.