Pages

▼

Monday, 7 January 2013

Pearl/Vorg Warp Sound Filter

Per request. This one is buffered effect, so you'll need just 2PDT stomper. Original unit has two NEC C251Cs in it and if you really want, you can score those for ~6 USD a piece from evilbay. However, the build reports state that any dual op-amp will work just as well. It should work just fine with JRC4558, TL072, NE5532 and so on.
---
Note thte double links. Those are the blue dots. You know the deal...






at

32 comments:

  1. visualdistortion7 January 2013 at 08:50

    THANKS a lot Miro, I waited so long for this pedal!
    I need to build it next week.
    I think you forgoted cuts behind the ICS

    ReplyDelete
    Replies
    1. mirosol7 January 2013 at 09:38

      Aaaahrgh. So i did.. :) I'll fix it tonight. This is exactly what happens when you draw 50+ layouts per month :)
      +m

      Delete
    2. mirosol7 January 2013 at 17:02

      Fixed.
      +m

      Delete
    3. visualdistortion7 January 2013 at 22:30

      Thanks Miro, you made my day! Hope to do soon! I need to use a rev log pot!

      Delete
    4. mirosol10 January 2013 at 07:01

      Just noticed that fixing the IC cuts - i made a new error in there. There's no double link marks. I'll fix that tonight.
      +m

      Delete
    5. mirosol10 January 2013 at 19:18

      And fixed.
      +m

      Delete
    6. visualdistortion10 January 2013 at 22:13

      And I don't find what you fixed between the last version or the 7 january

      Delete
    7. mirosol11 January 2013 at 05:47

      Blue dots on the cut board. Component layout is the same, but the cut guide..
      +m

      Delete
  2. Milkit7 January 2013 at 11:09

    You're allowed the odd brain fart now & again Miro, we all have them! ;0)

    The demo, sounds like a lot of the effect happens in the last 3rd of the pot rotation, would using a log pot help it sweep better?

    ReplyDelete
    Replies
    1. mirosol7 January 2013 at 11:27

      Way i see it, it may be the best to use rev log...
      +m

      Delete
  3. Dave7 January 2013 at 14:06

    I have a good idea for a mod. If you used a DPDT on-on switch, you could switch between using the pot to control envelope or using a 10K LDR to effectively make it a wah pedal. I will give this a go when i have the parts. If anyone else tries it let me know.
    Thanks
    Dave

    ReplyDelete
  4. Goldenmonkeycolor7 January 2013 at 15:54

    So I remember reading that the 100k trimmer here controls the amount of fuzz? Is that true?

    ReplyDelete
    Replies
    1. Dave9 January 2013 at 12:08

      I think that is correct but i'd wait for Mark or Miro to chime in.
      Thanks
      Dave

      Delete
  5. visualdistortion9 January 2013 at 21:56

    If we want use with true bypass, what we have to remove?
    Thanks

    ReplyDelete
    Replies
    1. mirosol10 January 2013 at 07:03

      Simplest way would be to use SW1 as output. Removing the buffer components - not so simple.
      +m

      Delete
    2. visualdistortion21 January 2013 at 21:26

      And SW3 is unused?

      Delete
    3. mirosol21 January 2013 at 21:36

      Treat the input jack, green wire as board input and then, treat the SW1 wire from board as board output and omit all other switch connections. Then wire it per: http://tagboardeffects.blogspot.fi/2012/02/offboard-wiring.html
      +m

      Delete
    4. visualdistortion21 January 2013 at 21:48

      It's what I thinking, thanks for your confirmation!
      I've made the board, and drill the enclosure, I just wait the 50K rev log and the 10K lin pot

      Delete
  6. NIAB16 January 2013 at 04:34

    Hello guys, Without including extra modifications, could be this project consider as verified?

    ReplyDelete
    Replies
    1. mirosol16 January 2013 at 05:37

      If someone builds is successfully :)
      +m

      Delete
    2. Anonymous20 January 2013 at 01:49

      I plan on building it tomorrow, I actually bought the original ICs a while ago :) Will report back!

      Delete
  7. Dave30 January 2013 at 00:02

    I'm going to build this tomorrow evening so hopefully I'll have a possible verification for you. I'm looking to build more filter type effects so this should be a nice start.
    thanks
    Dave

    ReplyDelete
  8. Dave30 January 2013 at 22:43

    WOOHOO my 2nd verification, you can tag this one. I used tl072s for the opamps and its a really nice sounding thing. One mod, use a C5k instead of B10 for the envelope pot, with a b10 there is too much low end and a funny sweep, c5k cuts some of the bottom end and makes the sweep much more useful.
    Thanks for an excellent layout.
    Dave

    ReplyDelete
    Replies
    1. IvIark30 January 2013 at 22:55

      Awesome thanks Dave :o)

      Delete
    2. Dave4 February 2013 at 13:55

      If anyone is interested i came up with a mod for this which i shall try and describe. You will need a dpdt on-off-on toggle switch and an ORP12 LDR (or anyone with a very small light resistance, the smaller the better). I will be describing the dpdt switch wiring using this as a lug numbering system:
      1....4
      2....5
      3....6

      Firstly, the wires that connect the envelope pot to the board, dont connect them to the pot, instead, solder one to lug 2 and one to lug 5. Then solder a small piece of wire to connect lugs 3 and 6. Next, take one leg of the ldr and solder it too lug 1 and solder the other leg to lug 4.
      Now you will have a normal warp sound pedal in one position, using the pot to control envelope, in the mid position the pedal becomes a strange bassy synnthy fuzz pedal and in the other position the envelope is controlled by the ldr. Et voila!
      Thanks
      Dave

      Delete
  9. Anonymous24 March 2013 at 23:26

    Hi there, really looking forward to building this - just a little confused as to the LED wiring which shows as a red LED + coming off the board. Should that in fact be connected to the LED minus on the foot switch?

    Cheers

    ReplyDelete
  10. Anonymous25 March 2013 at 18:21

    Am now so far into the build - the more I look over the layout, the more confusing it becomes :/ is the LED in the bottom right actively used as a Diode? and an additional LED to be wired between the Red LED+ to the SPDT Black LED- on the foot-switch for on/off indication? ... a brain racking arrrggg! - Mirosol please help!

    ReplyDelete
  11. Synsound9 March 2015 at 21:52

    Need a little help. I built it and the filtering / envelope is working but the signal is only the slightest bit distorted. It's almost clean. In what I've read there is a lot of mention of driving this with another pedal like a distortion and when I do that it sounds like the demos.
    What I want to know is:
    If used by itself will this act as a fuzz or just a supplemental filter?

    ReplyDelete
    Replies
    1. Unknown10 March 2015 at 10:32

      I'm pretty sure it's just a weird autowah effect, I think it's meant to be used with a fuzz to get that Shieldsy sound. I heard someone plugged it into their Meatball clone to get wild soundz...

      Delete
    2. Synsound11 March 2015 at 01:43

      Ok, if it doesn't generate fuzz then it works fine. Although, I don't believe it's an auto wah. The filter doesn't oscillate. It remains in a fixed position.
      I'm thinking about making a multi filter unit with this, a harmonic energizer and maybe a sound saw.
      Thank you for clearing that up.

      Delete
    3. Unknown21 September 2015 at 05:31

      Yeah my bad, not an autowah, just a filter. Kinda like a fixed wah but more synthy filter style. It can be fuzzy when you crank the trimpot. Ideally, put it out as a full pot and you can control it.

      Delete
  12. Zombie1120 February 2016 at 23:52

    The no-brainer mod for this one is an expression pedal for the envelope. A Roland EV-5 has a 10K pot so it works perfectly, just connect the two envelope connections to the middle of a dpdt, then have it choose the lugs of the pot or the + and - of a mono jack.

    Adds so much to the pedal, i'd never even want to play it without an expression pedal.

    ReplyDelete