Hacking a new output to mixer

[Tribat]

I just bought the Numark CM200 19" DJ Rack mixer and noticed that there is only one PFL output.
The Headphone jack at the front panel. Now I want to add another PFL line level output to the
backpanel of the mixer. Also the "Cue/Mix/PGM" crossfader meant for the headphone PFL output
should not affect this new output. So only the PFL (Cue) signal will be coming out this new output.



So heres the steps I was thinking about:
1. I open the mixer
2. I switch it on and route few channels to the PFL
3. I try to find a spot (with headphones) from the PCB where the mixed PFL signals can be stolen

Am i gonna find a spot like this?

So if there is a spot like that I was thinking of hooking a buffered op-amp amplifier to it.
Then I would drill a few holes to the backpanel for some new RCA connectors and hook the output of the
op-amp circuit to them.

I probably also need to drill a hole for a DC jack so i can power the 4 new op-amps?

So what do you think?

[gain-wire]

I would try to get a schematic, it would be easier. But if not then as you mentionned, it seems logical. But I think you should be able to steal from the mixer's power supply if it uses the same power scheme (bipolar, or unipolar, doubtful they would have done that). good luck!

[Tribat]

Originally posted by gain-wire
I would try to get a schematic, it would be easier. But if not then as you mentionned, it seems logical. But I think you should be able to steal from the mixer's power supply if it uses the same power scheme (bipolar, or unipolar, doubtful they would have done that). good luck!

I don't think they release schematics.

The mixer's PSU looks awfully tiny, I found a picture of it from the Numark replacement parts shop. I don't wanna overload it

[Frank Berry]

You may find the Cue audio at one end of the Cue/Program fader.
Add a simple Opamp and feed the output of the opamp to a connector on the rear panel.

[Tribat]

Originally posted by Frank Berry
You may find the Cue audio at one end of the Cue/Program fader.
Add a simple Opamp and feed the output of the opamp to a connector on the rear panel.

Yes this is what I'm hoping to find 8)
Is there a reason to use two op-amps? First one to buffer and the second one to amplify the signal to line level?

Does anyone by the way know anyone who has done something similar? I couldn't find anything

[Frank Berry]

There is really nothing to be gained by using two Opamps.