Quote:
Originally Posted by 2N1305  I know it isn't really my place to answer, but I figure Vince will say the resistors in the EQ circuit or around the Mic opamp, especially the ones that go from + and - inputs to ground. Oh wait, they probably are already 1%.
Nevermind what I said. Let the pro answer, I need my schematic!  |
2N1305, that's what I would recommend too.
These days most resistors are 1% unless otherwise noted. Back in the days when that A&H mixer was made, all resistors were 5% unless otherwise noted.
I breifly scanned your input module schematic and observed, for example, the 6.8K phantom resistors are 2%. Change them to 1% 50ppm.
If you're going to use the mic pre then R1-R6, R12, R13, R16-R18, R20 should be 1%.
Unless I'm missing something, it looks like all summing amp and outputs are unbalanced so you don't really need to worry about resistors in the master section.