Boss - CE-1 Chorus Ensemble  [schematic]

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.

Re: BOSS CE-1

Postby pf_fan » 05 Oct 2009, 16:51

borislavgajic wrote:pf_fan...this is music for my eyes!

many thanks :applause:

You're welcome but I just found those pics somewhere online and reposted them here. That's all :)
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Re: BOSS CE-1

Postby borislavgajic » 05 Oct 2009, 20:34

pf_fan wrote:
borislavgajic wrote:pf_fan...this is music for my eyes!

many thanks :applause:

You're welcome but I just found those pics somewhere online and reposted them here. That's all :)



never mind......pics are great...again thank You!!!
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Re: BOSS CE-1

Postby borislavgajic » 07 Oct 2009, 10:25

what is difference between TA7504s and TA7136p.........?
which one to use?

could BBD be subbed with MN3007 ???
wher in europe can I find original BBD?

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Re: BOSS CE-1

Postby borislavgajic » 07 Oct 2009, 10:45

little something to warm up your imagination...........it looks like no problem to make! :wink:


boris
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Re: BOSS CE-1

Postby quarara » 07 Oct 2009, 11:22

borislavgajic wrote:
wher in europe can I find original BBD?

boris

try vintage planet ;)
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Re: BOSS CE-1

Postby Rocket Roll » 08 Oct 2009, 14:49

I think you'll find this link very informative: http://www.bossarea.com/forum/topic.asp?TOPIC_ID=8049

borislavgajic wrote:it looks like no problem to make! :wink:


Retro-Sonic clone of CE-1 would be much easier to make - no transformer (charge pump), fits in 1590BB, and it's guitar-friendly (original CE-1 was designed with keyboard players in mind).

Retro-Sonic CE-1 clone: http://gtrgear.com/Retro-Sonic/Chorus.htm
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Re: BOSS CE-1

Postby borislavgajic » 08 Oct 2009, 18:40

Rocket Roll wrote:I think you'll find this link very informative: http://www.bossarea.com/forum/topic.asp?TOPIC_ID=8049

borislavgajic wrote:it looks like no problem to make! :wink:


Retro-Sonic clone of CE-1 would be much easier to make - no transformer (charge pump), fits in 1590BB, and it's guitar-friendly (original CE-1 was designed with keyboard players in mind).

Retro-Sonic CE-1 clone: http://gtrgear.com/Retro-Sonic/Chorus.htm


Yes I red about that,but after Youtube demo of both pedals side by side.........keyboard version is my favourite............and transformer is not a problem :block:

and you can see for yourself :arrow: .... http://www.youtube.com/watch?v=qeKon5JC ... re=related

much brighter sound...and nicer(I think)

boris
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Re: BOSS CE-1

Postby Rocket Roll » 09 Oct 2009, 00:48

There's a very slight difference, I agree. But try listening while not looking in the monitor - I couldn't tell which pedal plays in that particular moment. Eyes are so much easier to convince than ears :D

RetroSonic mods to CE-1 are relatively small, not linked to tone & most probably reversible - ask Mark H, he helped with the design.

Anyway, the first layout posted is verified & working:
http://www.diystompboxes.com/smfforum/i ... ic=64736.0
http://www.diystompboxes.com/smfforum/i ... ic=65367.0
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Re: BOSS CE-1

Postby borislavgajic » 09 Oct 2009, 10:06

RetroSonic mods to CE-1 are relatively small, not linked to tone & most probably reversible


..... I still hear the difference...... :D ...
.....never mind....ce-1 is a legend, and want to make clone of CE-1.........
.....it would be nice to have propper designed PCB...and complete project here.....


cheers
boris
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Re: BOSS CE-1

Postby Rocket Roll » 09 Oct 2009, 11:37

Just to explain why I would prefer RetroSonic's version - I've got one with me right now (revision D, fully operational but needed a cap job), and it's pretty much unusable for guitar:

- Bloody thing just won't stop distorting, no matter what you do. God forbid that you use "High" mode.
- The owner added a mains out cable, so after removing it I had the place to install R11 mod without any further drilling (replacing R11 with 470K pot). Doesn't really help with distortion, it just makes the pedal quiet - CE-1 just can't cope with attack portion of the guitar note.
- Does it get brighter with a buffered pedal in front? Not really, you have to install 500K pot on the input for that.
- Does it do something that other choruses don't? A matter of taste, I suppose. I share Mark's opinion on that one - you plug it in and go "Oh, it's a chorus". Also, having only the "Intensity" control for the chorus is IMHO not enough.

Couple more pics, just in case:

IMG_0003.jpg

IMG_0007.jpg
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Re: BOSS CE-1

Postby borislavgajic » 10 Oct 2009, 09:52

nice pictures.......could you make some more......wires,pots and jack connections?

thanks

boris
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Re: BOSS CE-1

Postby Rocket Roll » 10 Oct 2009, 12:13

Sure.
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Re: BOSS CE-1

Postby Rocket Roll » 10 Oct 2009, 12:20

Another angle.
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Re: BOSS CE-1

Postby Rocket Roll » 10 Oct 2009, 12:31

Notes: all electrolytics replaced (0.47uF's with 'styrenes and WIMA). Everything else on the PCB's stock. Do not overlook the 220K resistor mounted on the Vibrato Rate pot. Transformer secondary switch replaced with the closest one I could find on such a short notice (the unit goes back to the owner over the weekend). Thick black wire that goes on the PCB is part of the R11 mod. Level Control pot replaced with 500K pot. Peak Level diode removed for inspection, then re-glued back in.
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Re: BOSS CE-1

Postby borislavgajic » 10 Oct 2009, 18:14

thanks a lot.....

borislav
:thumbsup
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Re: BOSS CE-1

Postby yeeshkul » 27 May 2010, 09:16

Guys what transformer is that? It seems to be 220V/ 2x18V but i need VA - i have one unit here and the transformer is dead, i have to replace it ....
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Re: BOSS CE-1

Postby Fastnet » 29 May 2010, 09:51

Way back when (20 years ago ish) I bought mine from the classifieds in Guitarist mag for 40 quid I think. The guy who sold me the pedal included a full set of schematics... Although I haven't seen them for a while it's not something I would ever have thrown away so I'll have a look and post them if it would be of interest...
He said in his cover letter that "If you're any way technical and own an osiliscope, there's a pot that can be adjusted to give a lusher sound...."
Anybody seen or heard of this before?
........I've always wondered......
Re: distortion mentioned in an earlier post, my level is no more than a quarter turn up. I set mine so the level led lights gently.... Clean sounds are still clean just warm, obviously in an analogue manner, and yes forget the high position!
Cheers,
J.
"After silence, that which comes nearest to expressing the inexpressible is music." Aldous Huxley
or...
"Pog mo thoin!"
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Re: BOSS CE-1

Postby Alex Frias » 03 Jun 2010, 23:20

More pics. My CE-1...

IMG_0141.JPG


IMG_0147.JPG
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Re: Boss - CE-1 ( Chorus Ensemble )

Postby Angle Loss » 29 Jul 2011, 17:15

Does anybody know the delay time for the CE-1? I was kind of surprised by some the Maxon/Ibanez stuff, and though one of you might know about my favorite chorus, the CE-1.
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Re: Boss - CE-1 ( Chorus Ensemble )

Postby lufox15 » 29 Aug 2011, 03:44

Hi!, looks like my last post was delete jeje, well, again i made one of this, and work fine :D a demo:
http://soundcloud.com/bbpsound/chorus-prueba
Saludos.
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