Salocin
New member
- Joined
- Aug 8, 2009
- Messages
- 3
Hi,
First post. How daunting!
I'm currently building my first piece of 'recording gear' after dabbling in effects pedals, amps and other miscellaneous electronics for the past couple of years. The project- a Green Pre and What Compressor in a single unit, as a front end for my four track. The pre will be on all the time but I want to be able to switch the compressor on and off.
The difficulty I'm having stems from the fact that the pre has a balanced input/output but the compressor does not.
The schematics I'm working from are:
http://1176neve.tripod.com/sitebuildercontent/sitebuilderpictures/gren_pre_cct4.gif
http://dt.prohosting.com/hacks/what1.gif (Although this is a stereo/dual unit I only intend to use half of it)
What I've concluded from the Green Pre schematic is that the negative portion of the balanced output is the output of the amplification stage/s (IC2a output) run through a unity gain inverting stage (IC2b). Is this correct?
If so, I'm thinking that I can insert the compressor at the output of IC2a and have the IC2b inverting section after the compressor. Possible?
Now, if I'm on the right track so far, I want to be able to switch the compressor on and off. To do this I'm planning to use a DPDT switch, with the poles on one side jumpered together, and the other side being the input/output of the compressor. I'm thinking that I could (perhaps would be better to) insert the compressor at the output of the pre's C11 capacitor and remove the compressors c3 capacitor (at its input). Would this be a good way to do this?
Thanks to anyone who can offer some advice.
First post. How daunting!
I'm currently building my first piece of 'recording gear' after dabbling in effects pedals, amps and other miscellaneous electronics for the past couple of years. The project- a Green Pre and What Compressor in a single unit, as a front end for my four track. The pre will be on all the time but I want to be able to switch the compressor on and off.
The difficulty I'm having stems from the fact that the pre has a balanced input/output but the compressor does not.
The schematics I'm working from are:
http://1176neve.tripod.com/sitebuildercontent/sitebuilderpictures/gren_pre_cct4.gif
http://dt.prohosting.com/hacks/what1.gif (Although this is a stereo/dual unit I only intend to use half of it)
What I've concluded from the Green Pre schematic is that the negative portion of the balanced output is the output of the amplification stage/s (IC2a output) run through a unity gain inverting stage (IC2b). Is this correct?
If so, I'm thinking that I can insert the compressor at the output of IC2a and have the IC2b inverting section after the compressor. Possible?
Now, if I'm on the right track so far, I want to be able to switch the compressor on and off. To do this I'm planning to use a DPDT switch, with the poles on one side jumpered together, and the other side being the input/output of the compressor. I'm thinking that I could (perhaps would be better to) insert the compressor at the output of the pre's C11 capacitor and remove the compressors c3 capacitor (at its input). Would this be a good way to do this?
Thanks to anyone who can offer some advice.