Meta42 Good values for R3-R6
Jul 17, 2003 at 3:46 AM Thread Starter Post #1 of 5
cello

cello

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Hi - I just bought the parts to build a Meta42 and am now considering what to use for resistor values for R3-R6. I'm planning on use the meta42 initially with HP890 cans, and then I'm going to prolly buy myself some high-end Grado's.
 
Jul 17, 2003 at 9:22 AM Post #2 of 5
What opamp are you using? I have OPA2132 and OPA2228, hoping for a gain of 5 with the first, and 8 with the second. My gain-of-five values are these:

R3 - 470R
R4 - 2K
R5 - 2.2K
R6 - 220K
 
Jul 17, 2003 at 7:30 PM Post #3 of 5
I'm using two OPA134PAs
 
Jul 17, 2003 at 8:37 PM Post #4 of 5
Quote:

Originally posted by myself, aka me
What opamp are you using? I have OPA2132 and OPA2228, hoping for a gain of 5 with the first, and 8 with the second. My gain-of-five values are these:

R3 - 470R
R4 - 2K
R5 - 2.2K
R6 - 220K


Why don't you make R4 = R5 and avoid buying two different resistors of nearly the same value?
 
Jul 17, 2003 at 11:33 PM Post #5 of 5
Because I didn't know I could.
redface.gif
. Thanks for that!
 
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