Friday, 9 May 2014

Skrydstrup R&D Overdrive ODR-2

May as well add this one too :o)  The layout actually ended up looking quite different but this is very obviously a Cornish SS-2 clone, at a similar sort of price.  There are some differences which I expect will make them noticeably different, so this is probably still worth building even if you build the SS-2 as well, but I certainly wouldn't expect them to be worlds apart in tone.  It would be nice to critically compare the two though.

The same applies as with the SS-2, this is designed with true bypass switching in mind, but if you do want to build it with the buffered bypass, then make a daughterboard of the Cornish Buffer.  The input socket connects directly to the input of the bypass buffer.  The output of the bypass buffer then goes to ODR-2 input and daisy chains to the 3PDT stomp switch, lugs 1 and 4.  The output of the ODR-2 will go to 3PDT lugs 3 and 6, and the output socket connects to 3PDT lugs 2 and 5.

The third pole of the 3PDT is used for LED switching as usual.

Info about the original Cornish copy:

Skrydstrup R&D Overdrive ODR-2
The ODR2 is a smooth, dynamic overdrive unit designed to emulate the overdrive sounds of our highly recognized OD50 Tube Amplifier.

This unit is perfect for overdrive tones ranging from a semi-cranked AC30 to the sound of Hendrix.

The TONE control is not a traditional tone control, but a High Frequency Damping control. Turned all the way up the TONE control is not active.





Posted by at 12:56
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11 comments:

  1. johnk9 May 2014 at 17:49

    it sounds great, but IMO, that's that's some really super crappy playing. ;-)

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    Replies
    1. IvIark10 May 2014 at 16:42

      No, Steve Vai probably isn't feeling too threatened :o)

      Delete
  2. Rockhound11 May 2014 at 19:43

    Now would be fantastic the Skrydstrup BR-1!

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  3. Unknown1 June 2014 at 20:12

    Thanks a lot for this. I built it and it sounds great. However I'm getting quite a bit of hiss and the tone control is overly bright. Any ideas?

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    Replies
    1. Unknown11 July 2014 at 17:43

      Please ignore the above (my bad). This pedal sounds really great. I was wondering what's the difference between the Cornish buffer and the Skrydstrup one. Is there a schematic for it?

      Delete
    2. IvIark11 July 2014 at 17:49

      The Skrydstrup is a copy of the Cornish, if you do a search for this pedal on FSB you'll see the buffer at the top of the schematic, where it is used as a bypass buffer.

      Delete
    3. IvIark11 July 2014 at 17:50

      And it's just occurred to me that you're the first person to post a successful build for this, so thanks for verifying! :o)

      Delete
  4. Unknown1 October 2014 at 12:26

    On the FSB schematic the 1u is an electrolytic cap. I don't know if it makes any difference but I thought it should be mentioned.

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  5. Unknown13 October 2014 at 17:29

    I'm getting switch pops at high volumes (buffered version -Switching off is the loudest). Is there any remedy? Thanks.

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    Replies
    1. Zach13 October 2014 at 21:43

      i don't have a schematic for this, so i'm not sure if there's one on the layout already, but you can run a 1M resistor from the input of the circuit to ground to act as an anti-pop resistor, which is known as a pull down resistor.

      Delete
    2. Unknown14 October 2014 at 13:04

      The (Cornish) buffer does have a 10M pull down resistor on the input (http://tagboardeffects.blogspot.co.uk/2012/02/cornish-buffer.html). It's not a led problem either. Tried several switches (mechanical and electronic ones, 3pdt being the most quiet) and the behaviour is the same.

      Delete

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