rbarreiros
Member
- Joined
- Jul 31, 2012
- Messages
- 14
Hello,
I've come across this weekend while at work on a concert, with this wonderful little box that is simply a 5 in 1 out fixed gain mixer with phantom power.
I had the opportunity to take 2 quick pictures of it, which are in the links below.
This box is fed through it's output XLR (it's a 5 pin XLR) that carries the power and returns the summed output.
It seems to be a simple inverter summing op-amp setup, with phantom power. I managed to get the schematic from most of it but there are some key points I haven't been able to, like the positive op-amp input schematic part, and the op-amp supply part. I can't see and have no means to figure out what that regulator is, or if it's even a regulator (I'm assuming it is).
Could one of you reverse engineering gurus make the schematic out of this ?
https://docs.google.com/open?id=0B_uvQNnYMhv2NmV3cVBYVUphVkk
https://docs.google.com/open?id=0B_uvQNnYMhv2UE5ZaG9IclJjc28
I've come across this weekend while at work on a concert, with this wonderful little box that is simply a 5 in 1 out fixed gain mixer with phantom power.
I had the opportunity to take 2 quick pictures of it, which are in the links below.
This box is fed through it's output XLR (it's a 5 pin XLR) that carries the power and returns the summed output.
It seems to be a simple inverter summing op-amp setup, with phantom power. I managed to get the schematic from most of it but there are some key points I haven't been able to, like the positive op-amp input schematic part, and the op-amp supply part. I can't see and have no means to figure out what that regulator is, or if it's even a regulator (I'm assuming it is).
Could one of you reverse engineering gurus make the schematic out of this ?
https://docs.google.com/open?id=0B_uvQNnYMhv2NmV3cVBYVUphVkk
https://docs.google.com/open?id=0B_uvQNnYMhv2UE5ZaG9IclJjc28
