[sdiy] What is this capacitor in the JP8?

[Rob Keeble]

Hi
I use high quality 1uf polarised capacitors here, as in the AM8109 Eurorack module. Can be any voltage above 16v, I use25v to keen the size down.

Rob

> On 14 Oct 2013, at 14:35, Neil Johnson <neil.johnson71 at gmail.com> wrote:
> 
> Hi,
> 
> Jack Jackson wrote:
>> Thanks. Is the 50v an important factor here, or was it just specified so people wouldn't use something too low like 16v for example? I've found some cheap 100v ones here.
>> http://www.hificollective.co.uk/catalog/rbd030-047uf-100vdc-elna-bipolar-capacitors-p-9449.html
> 
> It depends. Maybe that's what they had in stock?  Maybe that's what
> was on special at the time?  You need to understand the circuit to see
> what the maximum voltage across it could be, including startup and
> shutdown conditions, and possible latchup.  The voltage rating will
> also affect the case size, and also other electrical parameters like
> ESR.
> 
>> Also why they choose to use an electrolytic over a polyester?
> 
> Cheaper?? Smaller?? Adds to the J8 "sound"??  Dunno.  Try replacing it
> with a polyester and hear what the difference is.
> 
> Neil
> --
> http://www.njohnson.co.uk
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