Saturday, 21 January 2017

Ceriatone Klein-ulator

Here is something a bit different and maybe useful!
It's an "effects loop buffer".
There isn't a schematic for it but you can find the original layout on Ceriatone's forum here.
You can also find all infos on their original manual here.
12/03/17 Layout updated! Moved 220K resistor and link from S to G on the top J201.

19 comments:

  1. I was working on that last week. You were faster.

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  2. Thanks Alex!!I actualy have a Ceriatone amp and i needed that!!

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  3. Great post, you have pointed out some excellent points, I as well believe this is a very superb website.
    Plastic Flow Meter

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  4. Perfect for my Orange OR80. Thank you!

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  5. You guys are the best! I was just gonna make one of these! Thank you so so much!

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  6. Thank you so much for the great post! I have a question though. If I am not mistaken, according to the original layout on Ceriatone's forum (see the link above in the post) there are nine 100µF capacitors, and no 10µF electrolyitc caps. Can I use 100µF caps instead of 10µF? Thank you for the answer!

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    Replies
    1. Those are just for filtering.
      You can use 100uF if you want.

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  7. Thank you very much, Alex!

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  8. I had no luck so far, maybe I messed up the jack wiring, I don't know. I think I built it just like the layout but it has no sound at all. Has anyone tried to build this?

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  9. My build of this has sound until you get all the way to the top of the 220K at the top row (off Ret 2). Looking at the original K-lator layout, I think the layout around the upper J201 is not correct. The 220K connects to the S on the layout, but looks like it connects to the G on the orig K-lator layout. I don't see a path to get the signal from Ret2 to the G on that J201.

    What am I missing?

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  10. I think the fix is the link on the left side of the J201 needs to go to the G, not the S on that transistor, and the 220K needs to go to the same row. Looks like I'll need to route it behind the transistor, because there isn't room otherwise (given the cut to the right of the J201 G lead).

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  11. OK, 2 changes and it seems to be working now. I'm still getting some whine (charge pump?), but perhaps it's just all the wires I have flying around connecting 4 jacks and ground. Here are the 2 changes:

    1. Link on left side of the upper J201 (just to the left of the 500pF cap) goes to the G row, not the S row.
    2. Bottom of the 220K connects to the top of that link. Or, remove the existing 220K and put it to the left of the 500pF cap, running from the top row (like the current 220K does) down to the 3rd row down. In other words, 220K across the 500pF cap.

    I'm almost ready to say verified with those 2 changes.

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  13. It was a bad charge pump causing the whine.

    Warning, the voltage on the lower J201 is 31V with 8.6V input. Don't use low voltage electrolytics here. There's a reason the original Ceriatone layout used 50V electrolytics, it seems.

    I'm still not quite ready to declare total victory - the bright switches didn't seem to do anything. But all 3 pots work properly. And it passes sound just as you'd expect it to. So call it "mostly verified" for now.

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  14. Replies
    1. Thanks Michael.
      I've fixed it.

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    2. Thanks again for the layout. I've built/played Dxmble amps for several years, and always wanted an external -lator for the effects loop. This is better than anything else because I could fit it in a 125B case. Perfect!

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  15. Thank you folks! In the meantime I've built a PCB version based on the original K-lator layout. Here are some pictures:
    https://drive.google.com/open?id=0BzwSfU-PQgNRVGhNWlc3emVtRW8

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