Wednesday, 12 June 2013

Nobels DT1 Distortion

Not too much info around on this beloved cheapo pedal, but it seems to be of fairly good design. For the layout, i've omitted the input buffer to keep the size down. The output buffer has 2SK30-style pinout for couple of reasons. First, the original (schematic states K222E) is not that common. Second, it's just a buffer, so you should have exactly the same results with any NPN BJT in its place. Third, some of you might really want to try this with a BJT instead of JFET to preserve the stock they have. I thought about omitting the output buffer too, but the tonestack has vref voltage in it, so there has to be something to put that out before the output.

Straight-as-straight-can-be Distortion. A must-have for every Hardrock or Heavy Metal player.



10 comments:

  1. How would the BJT be oriented?

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    1. Gate=Base, Drain=Collector and Source=Emitter.
      +m

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  2. do you have the schematics for this pedal? i found realy interesting the clippin' thing on this box.. do you have any demo video too? awesome work! thanks!

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    1. You could try google:
      http://elektrotanya.com/PREVIEWS/63463243/23432455/nobels/nobels_dt1_dist_sch.pdf_1.png
      http://www.youtube.com/watch?v=yUb_mMXa1tw

      Demo vid is with bass and in german, but there doesn't seem to be anything else available. That's why i didn't post a demo video..
      +m

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    2. yeah hard to find a video but seems my next project! ehueheuheuhe thanks a lot!

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    3. Guitar Master, did you build it yet? Is it verified?

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  3. This comment has been removed by the author.

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  4. Finished it today, verified. Actually it is a quite nice distortion. For the buffer at the end I tried 2n3819 and it worked, but then I thought let's give the bjt's a try too. They work ok, tried 2n3904, 2n5088, 2n5089, BF214, hell, I even tried an AC176. The germanium sound was in here with this latter one, but Iiked the 2n5089 the best. With the jfet it was too sterile, with the AC176 the typical Ge-sound came in, but with the 2n5089 I had a nice tight, crispy yet warm distortion.

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