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Resonance Mod
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Resonance Mod

by isak on Fri May 17, 2013 3:56 pm

Hi Guys.

just wanted to share a some kind of a mod to the reso for those who dont want to do the reso boost mod and still want the gentle whistle that close to the 303 reso sound.
while building a x0x (the 10th x0x i think :) ) i always pic R97 (10k) to be the lower i can find among the 10k's batch to have a the famous whistle of the 303.
so i was thinking that i'm wasting time checking etch resistor, i put a trimmer instead R97 and fine tune it to the exact position before the hard whistle.
very happy with the results.

thats it, hope it can help some one.

cheers,
Isak E.

isak
 
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Re: Resonance Mod

by Gaetano on Tue May 21, 2013 1:15 am

Yes that does work, I can verify also; ironically I tried a 20k pot and the best result I got was a metal film 9.09k! Although a trimmer is a better idea, as all 303/x0xen will vary somewhat.
To make your own x0xb0x the 'Rare' parts are here: viewtopic.php?f=29&t=5526
(BA6110, AN6562, 2SC2291, 2SC1583, 2SK30AO, 2SK30AY, LA4140, 2SC945P or 2SC536F, 2SA733AP)
All the other parts are easy to get.


Gaetano :)
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Please be positive and constructive with your questions and comments.