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Component C29 is backwards on all TB-303's... (more inside)
Moderators: Altitude, adafruit_support_bill, adafruit, phono, mome rath

Re: Component C29 is backwards on all TB-303's... (more inside)

by cleaninglady on Sun Jul 29, 2012 8:04 pm

Hey Tim

Yes now you mention it , i have seen that capacitor symbol with the hatching between before. Just a theory , ( i didn't look at the entire thread either ...) :)
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Re: Component C29 is backwards on all TB-303's... (more inside)

by darffader on Sun Dec 09, 2012 10:56 am

Hmm

Still in doubt if it makes any sense to perform this mod.

The cap is SMT on my x0x btw: http://i.imgur.com/Gdu6I.jpg

But I could replace it for an older cap if that makes sense
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Re: Component C29 is backwards on all TB-303's... (more insi

by samuel94 on Sun Nov 23, 2014 7:45 pm

I just just registered to share my results and imo it’s totally worth doing this mod.
I added a switch to change between c29 fwd only + 10k res on r97 and c29 fwd & 30k res + 10k trimpot on r97 (to compensate lower resonance).
The difference is pretty subtle but noticeable. Accent becomes slightly softer, more fluent like in original 303.
Also Envelope mod becomes slightly greasier like in original 303.
Generally x0xb0x’s sequencer sounded more stiff to me imo but thanks to this mod it feels a little groovier and closer to original 303 now.

30k:
http://samuel94.npage.de/get_file.php?id=28005688&vnr=742401
original:
http://samuel94.npage.de/get_file.php?id=28005691&vnr=919074

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