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 <[email protected]> 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 <[email protected]> wrote: > > > > > > How do SuperCaps compare with electrolytics noise-wise? > > > > Didier KO4BB > > > > On Sun, Aug 25, 2019, 9:04 AM Gerhard Hoffmann <[email protected]> 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 > > > > > > > > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > > and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
