303 revision kit contains 4 4700uF 100V capacitors

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27-Dec-2019 01:47 PM

Frank

Frank

Posts: 38

Hello Dada electronics,

I am a bit confused about the revision kit I just received. The kit contains 4 4700uF 100V capacitors but the revision manual I downloaded only shows to use 3. Can you tell me if I am misinterpreting things wrong?


Kind regards,

Frank

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27-Dec-2019 03:42 PM

FBatista

FBatista

Posts: 131

The 4th capacitor (C3) is supposed to be in parallel with the main filter(c2) capacitor, the same way the original schematic does (C2//C3), so avoiding an empty hole in the chassis. 


It's great that DADA included it.
However, despite the possibility of a lower ESR, the main purpose in this model is looks.


Some people don't like the empty hole left in the chassis, from two 2000uF original caps to a single new 4700uF EPCOS.




I used to have 4 caps in total in my 303, but within months of the upgrade, removed and saved it to another 303 that came around.
The change in sound was none to my ears.


Someone will have some fun, upgrading his 303 :)


Happy 2020
Fbatista


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27-Dec-2019 04:00 PM

Stefaan

Stefaan

Posts: 628


For logistic questions please send an e-mail to info@dadaelectronics.eu and we'll check it out.

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27-Dec-2019 04:00 PM

Frank

Frank

Posts: 38

Thank you fbatista. I have another 303 upgraded before using only three caps. I am using both as monoblocks. Would there be a difference in sound in this case. I read that you cannot hear a difference but I want to be sure.


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27-Dec-2019 04:27 PM

FBatista

FBatista

Posts: 131

Hi Frank,

For the sake of simplicity and control over carried out modifications, I'd mirror the upgrades on both 303's.

But, to the my best knowledge, pick the upgraded 303 you already have and conveniently (i.e. securely and safely) stuff the extra 4700uF cap in, by paralleling with the existing one (watch polarity).

Try it yourself throughout some days, before deciding.



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