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CE-2

Chorus

Courtesy/Thanks to: Boss

Description: The following description is taken almost in full from www.bossarea.com
The CE-2 was the first compact pedal chorus from Boss. The CE-2 builds on the legacy of the CE-1 but isn't identical. The middle region is boosted in the CE-2 compared to the CE-1. According to the design engineers this may be because the CE-1 had a lower input impedance.

Roland says that they stopped marketing the CE-2 November 1982. The pedal was however still produced and sold at least out 1990. The label changed from black to green 1984. The CE-2 was produced in Japan up until 1988 when production moved to Taiwan. The CE-2s circuit changed very little over its more than 10 years in production.

Version differences
-The CE-2 exists in both silver screw and black screw versions.
-The font used on the "Chorus" label is wider on some versions. This results in the C in CE-2 to be located under the r in Chorus on -the earliest models while it later ended up under the u.
-The circuit has gone through some minor changes but nothing significant. All versions of the CE-2 are designed around the MN3007 BBD using MN3101 clock driver.

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Files
boss_ce2.gif
   Schematics for the Boss CE-2 Chorus.
ce2.jpg
   Picture of the Boss CE-2 Chorus guitar pedal
Links
http://www.bossarea.com/
   BossArea - Boss Product Reference
Manufacturers
Boss
   
Parts used
TL022
   Dual Low-Power General-Purpose Operational Amplifier
4558
   DUAL OPERATIONAL AMPLIFIER
2SK30A
   Silicon N-channel Junction Field Effect Transistor
2SC945A
   NPN SILICON TRANSISTOR
MN3101
   Clock Generator/Driver Cmos LSI for BBD
MN3007
   1024-Stage Low Noise BBD (Bucket Brigade Delay)
2SC732
   Silicon NPN Epitaxial type (PCT PROCESS)
Related Products
CE-3
   Chorus