Kingston said:Looking good. Just a thought, but the (unity or low gain) buffer stage for the input might be unnecessary. Unless perhaps you meant it as a boost for seriously overdriving the input stage. Also why inverting?
Just the one debalancing opamp is plenty for an attenuator pot. You could instead use that "extra" NE5532 half for a servo to take out one of the input stage electrolytics.
etheory said:the original circuit inverts the output, so this does a good job of correcting it.
Kingston said:But also I'm not sure if TS1 might be sensitive to the output impedance of the stage driving it. Would think it's quite a high impedance input, and thus no effect whatsoever.
etheory said:Awesome and bugger at the same time.
You are completely correct and have just saved me another opamp stage from the design (= less parts = less noise), but now I have more board layout work to do (DOH!).
Interestingly, I was sure I had tested this exact suggestion, as it had occurred to me before at one of the early stages of development, but I think there were other issues in the design at that point that got in the way.
If you want to improve the high frequency response of the original, swap C1 from 5uF to 22uF and drop the 220pF C6 entirely. This gives a tad more high end when under compression.
Unfortunately there are two instances of C1.mig27 said:C1 seems to be one of the timing caps and is 50uF, not 5uF.
It's not quite finished yet (damn it's close), but, thank you ;-) It means a lot to know people are interested in my ramblings!mig27 said:Thanks for this awesome project by the way!!
Kingston said:What's the output stage like, by the way? Directly from TS6 or something more?
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