Power Supply Question

[skypn]

Thank You for your fast response.

[aion]

A thing to note... R7 and R8 should be matched for identical value. This creates the biasing voltage for the op amps

This isn't necessary - it's just the difference of the bias voltage being 1% above or below half the supply voltage, as opposed to exactly 50.0%. The bias voltage is just a virtual ground and slight variances in the actual voltage won't make a difference as far as the rest of the circuit is concerned. Don't get hung up on it!

Also, practically speaking, resistors from the same manufacturer & series are often matched much more closely than the tolerance would indicate, just as a byproduct of the manufacturing process. So if you pull two 10k resistors from the same bag, and they have nominal +/-1% tolerance, it's likely they'll actually be within 0.1 to 0.5% of each other. The 1% is just a guaranteed maximum but they usually don't get anywhere close.