[tbdoah]

Yeah, but I'm not going to want the resistors for all of my output, just the output for the 4P. So how could that work.

OR/OL -> Switch -> Output 1 / 75R Resistor -> Output

Would that work? Thanks for the correction JMT.

 

[tbdoah]

And um, some recommendations on resistors for a gain of 10 would be helpful

.

 

[JMT]

Quote:

OR/OL -> Switch -> Output 1 / 75R Resistor -> Output

Something like that would work, or you could utilize two seperate headphone jacks...the output going directly to one jack, and then another jack with the resistors.
Quote:

And um, some recommendations on resistors for a gain of 10 would be helpful

Check the original schematic, I believe that would give you a gain of around 9.

 

[tbdoah]

Yes, two jacks is what i was thinking, and i'd utilize an additional switch to change the output between the two jacks.

Gain of 9 would be great, but i'd still like to take a stab at 10.

 

[myself, aka me]

I'm not sure there is too great a difference between 9 and 10, especially without crossfeed.

Hmm, gain of 10

This gives you near enough.. gain of 10.094942324755988

R3 - 680R
R4 - 6.8K
R5 - 6.8K
R6 - 820K

R5 and R6 give an inner loop gain of 121. Odd, I guess. I'm not sure what inner gain to use with an AD823 - mines about 180 or some weird number like that.

 

[tbdoah]

Thanks me.

Anyway, I was thinking about it, and JMT, since you knew about that self switching jack for the DC input, do you know if there's a similar one that I could use for the headphone i/o?

 

[JMT]

Here is a 1/8" mini jack from Digi-key.

 

[tbdoah]

Thanks JMT. That will be really helpful.

Hrmm, I think I've gotten all my parts figured out, now all I have to do is start ordering things.

Thanks to every body that helped

.