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Subject: Re: [motm] substitute non-polar caps

From: Richard Brewster <pugix@...>
Date: 2007-03-31

I don't think WIMA MKS come as big as 33uf, 16V (C6 in the 485).

You can substitute two polarized electrolytic caps for one non-polar.
Wire them in ∗series∗ with the '+' terminals tied together and using the
two '-' terminals in the circuit. In series the capacitance is halved
and the voltage doubled. So, two 68 uf 16V polars in series approximate
one 33 uf non-polar 32V. No problem that the voltage is doubled. The
main problem with this is just physical space. Be creative.

Richard Brewster

ilanode wrote:
> Hello list, I'm reading here for a while but this is my first post.
>
> I'm the happy owner of bare MOTM pcb.s (190 and 485). However shopping
> for appropriate sized non-polar caps seems to be impossible overhere
> in Germany. Even though I'd like to stick slavishly to the BOM I'm
> tempted to substitute them for WIMA MKS. Do you think it a good idea?
> Alternatives? Any help is highly appreciated! Regards, Ingo
>
>
>