Today i tried mounting one channel of api312 together with one channel neve 1272 using the same psu.
I tried experimenting alot with different grounding schemes, but i couldnt get the neve to be quiet. Together with the api theres a slight groundhum. Alone the neve is totally quiet.
Any ideas on how to solve this problem?
Connecting a wire from the input transformer Mumetal case to the star ground point seemed to lower the groundloop noise a bit, but it was still there (the transformer can is already grounded to the pcb audio ground, but grounding it with another wire seemed to lower the noise anyway)
The Api didnt seem to care either way, and was quiet together with the neve.
Do i need to build another psu for the neve channels to get this to work, or is there anything else i can try??
/Jonas
I tried experimenting alot with different grounding schemes, but i couldnt get the neve to be quiet. Together with the api theres a slight groundhum. Alone the neve is totally quiet.
Any ideas on how to solve this problem?
Connecting a wire from the input transformer Mumetal case to the star ground point seemed to lower the groundloop noise a bit, but it was still there (the transformer can is already grounded to the pcb audio ground, but grounding it with another wire seemed to lower the noise anyway)
The Api didnt seem to care either way, and was quiet together with the neve.
Do i need to build another psu for the neve channels to get this to work, or is there anything else i can try??
/Jonas