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copper
Bronze Member
USA
73 Posts |
 Posted - 02/17/2009 : 22:04:35
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I currently have a CE-3 that I did a couple mods to so it would be more like a CE-3. I have a couple questions about the IC's though:
1. I know a straight swap of IC in the CE-3 for the IC in CE-2 is not possible. I noticed that legs 1 and 5 are switched. If I put some sort of jumper to connect the certain legs to the correct position, would I be able to use the MN3007 (CE-2) instead of the MN3207 in the CE-3?
2. If I did this, would I have to swap the IC4 for a MN3101 (CE-2) also?
3. Would just swapping the stock chips with newer/higher-quality ones make a difference other than just being easier?
4. Q7 on the CE-3 is not on the CE-2. If I am able to swap the IC's, would Q7 have to be removed?
Sorry for all the questions. Hope they make sense too. Thank you!!
CE-2 Schematic:
http://audiohi-fi.narod.ru/cxems/Ce-2.gif
CE-3 Schematic:
http://www.synthdiy.com/files/2007/bossce-3.jpg |
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mwichni
Copper Member
Poland
17 Posts |
Posted - 02/17/2009 : 22:10:46
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Why do you want to swap the chips? You can get a pcb for CE-2 from www.tonepad.com BTW CE-3 and CE-2 are almost the same, except the ic chips and values of two or three components.
Cheers |
Edited by - mwichni on 02/17/2009 22:11:08 |
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nathanscribe
Silver Member
United Kingdom
376 Posts |
Posted - 02/18/2009 : 01:05:42
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The BBD ICs used in the CE-2 and the CE-3 have different connection requirements, so can't be swapped directly without also modifying some other components. Note the supply connections, and the connection through pins 7&8 via a 56K resistor to ground/+ve.
Also, look at the modulation oscillator. The LFO in the CE-3 has an extra resistor and cap around the 1st part of the op-amp (but note also the pin numbers are different as the halves of the dual IC are swapped with those in CE-2).
The CE-3 sounds a bit rough in mono, whereas the CE-2 is smooth - but in stereo, I think the CE-3 comes into its own and can sound quite lush. Personally, I'd leave it alone, but I'd still be interested to hear the results. |
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copper
Bronze Member
USA
73 Posts |
Posted - 02/18/2009 : 02:54:09
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| Ahh, ok,it does seem a bit more complicated than expected. Would swapping out the IC's (3 and 4) for higher quality ones be a nice upgrade? I found that Visual Sound makes some of the same type that work with the CE-3. Would the VS ones be considered higher quality? |
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Swapping IC's in CE-3
