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RE: Which 0.1uF polypropylene bypass caps?

I have no practical experience here but I think it depends on what you are trying to achieve. In general bypassing the circuit is better than bypassing the power supply, i.e. apply bypassing close to the circuit.
If your goal is to lower the power supply impedance across a range of frequencies then you can make some reasonable calculations knowing the ESR & SRF of the electrolytic and the bypass caps and an estimate of the wiring inductance in the loop of interest (1nH per mm. is a good estimate).

If you have no objective goal in mind then you will have to sift the answers to find one you like.

Regards
13DoW

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