Quote:
Originally Posted by jonfields45
While I don't think I can eliminate a ground loop, I think his problem is more likely common mode noise between two devices each using their own switching power supply.
When he takes the AC33 off batteries and onto its wall power adapter, he is making it solidly grounded which exposes the PC's much more powerful common mode noise.
The right solution is a DI between the AC33 and PC. The cheap solution might be floating the wall adapter's ground to the AC33. However it is only a cheap experiment and no guarantee.
|
I had a noise issue trying to use an A/B switch to switch headphones between my PC and mixer. I used something similar to this:
https://www.amazon.com/Xinsany-Compa...%2C131&sr=8-76
I built mine using a component that had two isolation transformers on a PC board, but I suspect this device works in a similar fashion. Unfortunately I can't find a link to the component I used.