[time-nuts] Building a DMTD/phase noise set in the 21st century
Gerhard Hoffmann
dk4xp at arcor.de
Thu Aug 29 23:19:42 UTC 2019
Am 26.08.19 um 04:47 schrieb Bruce Griffiths:
> 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.
I had bought some at DK, but 30 Ohms or worse at AC in the source
produce >700pV/rtHz alone.
That would add (geometrically) to the 300 pV/rtHz of one Interfet
IF3601/3602
and spoil the pot, so I stayed with the multiple electrolytics with
milliOhms.
regards,
Gerhard
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