Turing
Head-Fier
- Joined
- May 22, 2004
- Posts
- 94
- Likes
- 10
i'm not using any jacks right now, just clips.
Originally Posted by Pars Hmmm, 10mA sounds reasonable I think for an OPA2132. Do you have an LED in yet? I would suspect not. Does your meter have a mA range? Also, try measuring V+ and V- with the opamp out, but phones plugged in (check the output DC offset BEFORE you plug phones in... output L to ground, output R to ground... anything over 20mV or so DO NOT plug the phones in unless they are expendable!). If the DC offset is OK, do your V+ and V- behave the same without the opamp in? Did you use the stock PS component values of 4.7K resistors and 220uf caps? Increasing the cap size to 470uf may help some. |
have you ever heard of a bad opamp causing the poor voltage split? |
When the input unplug, The inputs grounded, so no hiss at all. |
I'm still looking the way to remove the noise completely. |
Originally Posted by Kenny12 hm.. i can't see a ground out or in? |
Originally Posted by Pars That's a damn good observation Kenny... you must have the input and output grounds referenced (as in connected) to your virtual ground down the center of the board. |
Originally Posted by Kenny12 hm.. i can't see a ground out or in? |