Modding a Boss CE-3 to CE-2 possible?

[Darxide]

Hi folks,

I have an old ACA powered Boss CE-3 which I want to mod to give back the warmth of the CE-2. So using all of my inexperience I came up with simply swopping the BBD and driver chips (MN3207, MN3102) with the older CE-2 BBD and driver (MN3101, MN3007). Looking at the circuit diagrams for both the circuits look very similiar so I thought it might work, however after making the swop the CE-3 now has no chorus, just a small volume drop when the effect is engaged.

Anyone done this mod or have any idea if you can do a like for like replacement of those chips with the CE-2 versions?

Warm regards,

Chris

[zeeman]

Chris,

I compared the two schematics a couple of years ago, and from what I recall, there are differences. You cannot simply swap chips as you did.

I suggest you go back and re-examine the schematics.

In addition, since you already have the ICs required for a CE-2 (i.e. MN3101 and MN3007) and assuming that they were not damaged due to the swap, you can build your own CE-2 by using the PCB available at TonePad. Here is the link.

Good luck.

zeeman

[Mark Hammer]

The "warmth" of the CE-2 is unrelated to the chips used, but rather with the delay range and accompanying filtering.  There is nothing that the MN3007 does that the MN3207 cannot do, save for operate at other supply voltages.

[Darxide]

Excellent and many thanks guys, yeah there are differences which I had hoped to be able to ignore. Thanks for the link, I am likely to pursue that route instead and revert the CE-3 back to the original chips.