Parts to order for prototyping

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Why? I’ve never seen a synth circuit that requires that tolerance. Sometimes you need resistors that match at the 0.1% level, but it’s a lot cheaper to just go through your 1% resistors with a multimeter and pick out matching ones.

The ones I use the most of are 100 nF for bypass, and those can be cheap ceramics. In signal paths I use a lot in the 1 nF– 1 µF range, and those are usually film. Though for breadboarding I’ll grab a ceramic if the film isn’t readily available, it won’t make that much difference.

I don’t think I’ve ever used a log trimpot. Not even sure where to get one.

1M are useful sometimes.

TL07x are about 97% of the op amps you see in synth circuits.

LM4040 is a voltage reference, not a regulator. Use it when you need a precise voltage but don’t need it to supply much current.

LM13700 is in a lot of designs; unfortunately the through hole version is out of production (at least outside of China).

For prototyping, hand matched single transistors may be good enough; if you really need a pair, might be best to order it for that specific project. But I don’t see single transistors on your list. 1N3904 is used a lot, 1N3906 less so.

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