[sdiy] Tantalum caps and power supply filtering

Roman Sowa modular at go2.pl
Tue Sep 7 13:37:46 CEST 2021


Ceramic one would work better here, as long it's not cheap junk part 
from unknown source. The advantage of tantalum over ceramic is that if 
the tant cap shows 10uF it also has 10uF when biased at 12V. It's not 
the case with 10uF ceramic. That one may be aywhere between 8uF and 1uF 
depending on actual ceramics used.
You canuse regular aluminium electrolytic there too, or better any low 
ESR model, or if you want really cool stuff, try polymer OsCon 
electrolytics.

Roman

PS, the cap is probably dead after experiencing reversed polarity of 
power cable, caused by unshrouded umarked power header.

W dniu 2021-09-07 o 13:01, Jean Bender via Synth-diy pisze:
> Hi all,
> I'm fixing an eurorack module which has a dead tantalum capacitor (the 
> one between +12v and ground rail).
> I gonna change this one and also the other filtering the negative rail, 
> but i'm wondering if replacing them with ceramic capacitor or 
> electrolytic ones wouldn't be a better choice.
> If so, do i have to find exact capacitive value or should i take care to 
> use a bigger capacitance ?
> 
> Thanks a lot for your advices !
> Best
> J.
> -- 
> Jean Bender <https://hearthis.at/jean-bender/>
> 
> Hak Lofi Record <http://h.a.k.free.fr/>
> 
> 
> 
> 
> 
> 
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