[sdiy] Korg SDD-3000 5 volt supply problems
rburnett at richieburnett.co.uk
Wed Nov 14 18:32:43 CET 2018
> Often the reason for using tantalum caps was low ESR...
Yes. And particularly a stable ESR over a range of temperature and
lifetime. Whereas Aluminium Electrolytics display a rising ESR with
decreasing temperature and with increasing aging. (That's why old equipment
with a Switched-Mode Power Supply in it often fails like... "It was fine
when it was on, but there was a power cut or it was turned off for a while,
(it cooled down,) and when the power came back up, it wouldn't switch on
again." Prolonged heat damages electrolytics, but you don't see the full
extent of the ESR increase until they cool down.
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