[time-nuts] Building a DMTD/phase noise set in the 21st century

[Didier Juges]

Thank you Bruce,

I have a couple of bags of small supercaps (1 to 3F range). The ESR is not
negligible (50 to 60 Ohms) but for applications where you need a very low
cutoff in an A/C coupled circuit, they will do a good job, or to replace
battery backup in some applications. For bypass, they will need help with
lower ESR conventional electrolytics.


On Sun, Aug 25, 2019, 10:16 PM Bruce Griffiths <bruce.griffiths at xtra.co.nz>
wrote:

> I've only used an ultra low esr 33F supercap made in Korea in the source
> circuit of the input JFET on a preamp.
> Down to 10Hz at least it didn't appear to add significant noise to the
> 4nV/rtHz @10Hz preamp.
>
> Bruce
> > On 26 August 2019 at 13:52 Didier Juges <shalimr9 at gmail.com> wrote:
> >
> >
> > How do SuperCaps compare with electrolytics noise-wise?
> >
> > Didier KO4BB
> >
> > On Sun, Aug 25, 2019, 9:04 AM Gerhard Hoffmann <dk4xp at arcor.de> wrote:
> >
> > >
> > > Yes, these electrolytic capacitors can produce ugly effects.
> > >
> > > The winner is clearly the cheap
> > >
> > > < https://www.digikey.de/products/de?keywords=1189-1056-ND      >
> > >
> > >
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