> From: btmckee9@...
>
> https://www.digikey.com/product-detail/en/nichicon/QYX1H333JTP/493-3461-ND/2117750
>
> I bought some caps that are the same material as the existing
> caps, but they are too big to actually fit easily into the board.
>
> I'm wondering if these polyester caps are good enough.

I'd stick to polypropylene ones, at least for the 6.8nF caps, because they have lower equivalent series resistance and lower dielectric absorption, resulting in less ripple at the 50Hz sample frequency. It's not hard to find ones that will fit. Kemet PFR5682J63J11L4BULK and WIMA FKP2C016801D00JSSD look like they'd fit, although you might have to splay the leads a little to line up with the holes. The 33nF ones aren't as critical, because any ripple on them is reduced somewhat by the 1M resistors and 6.8nF caps.

--

Ciao, Paul D. DeRocco
Paul mailto:pderocco@...