Saturday 26 July 2014

Klon Centaur Silver Edition

Keith at BYOC reverse engineered a silver edition Klon when developing a PCB and noticed an error on soulsonic's 2009 schematic which was a couple of swapped resistor values around the Treble pot.  He also noticed a few value discrepancies which probably just amount to the difference between the gold and silver Klons.  The swapped resistors have been corrected in all Klon layouts on this site but I didn't want to just make the other changes to the existing layouts as I would like to keep the gold version up for those who would prefer to build it, and so I thought this version deserved its own thread. 
If you prefer to build this kind of circuit on PCB then the BYOC kit can be found here:

http://buildyourownclone.com/effects-pedals/silverpony.html

I don't know if they are going to start selling the PCB separately but you can of course enquire if you'd prefer to go that route.

Now I can hear some subtle differences when at the upper and lower end of the Treble pot, which will very probably be down to tolerance differences in the pot itself which could be as much as +/-20%.  I have to say in the more central positions I can't really hear any significant difference at all. At most  of the demo settings they sound identical to me, and at some the Silver Pony sounds a bit fuller.  Personally I preferred the Silver Pony.  Great job Keith.







and the corrected schematic



112 comments:

  1. Damn. I had the Klon board on my bench for at least a month and just populated all the resistors last night

    The whole reason I built it was because I was inspired by the sound of my friend's silver "no horse" Klon, so I gotta change my board now

    ReplyDelete
    Replies
    1. Did the version you built have the 1K8 resistor at Treble 1 or 3?

      Delete
  2. Replies
    1. Do these changes and it will be a silver:

      1K8 at Treble 3 should be 4K7
      4K7 at Treble 1 should be 1K8
      2K at Gain1-3 should be 47R
      27K at Gain2-2 should be 10K
      12K at Gain2-2 should be 4K7
      820p cap should be 560p
      Volume pot is 10K Log

      Delete
  3. Thanks dude! I looked through and found the changes but your list makes it easier

    Gotta say I'm really excited to finish this build now. The demo sounded spot on, I know this will sound glorious in my rig

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  4. I see that you also rejigged the 100K going to the 3n9 and it's link but it looks like the connections remain exactly the same

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  5. Great layout! Thank you for all your work!
    Can you please post the schematics? At BYOC cannot be accessed.
    Regards
    Coi2001

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  6. Thank you for the schematic. I built it and it works, but I noticed that is less loud than another Klon that I built, I am going to have to test it with the audioprobe to see if there is signal loss somewhere. i'll keep you posted...
    coi2001

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    Replies
    1. Same with mine. It's working, but it does not have the normal amount of gain. Its acting more like a clean boost.

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    2. Strange because it's basically the same as the other layout but with just a few tweaked values. I'll go over it to check

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  7. Wow....what a great layout. Still waiting for verification before I start building.mmmm

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  8. It'll be good to go. It's based on my Rev 2 layout with just a few value changes, so I know the main layout is correct

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  9. Niceeeee! Now I'm really curious about the D9B. They are rated reverse voltage max at 10 V

    ReplyDelete
    Replies
    1. I've got some D9B's and they're fine. Used is the way we do in these circuits there is never anything like 10V on them

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  10. Just ordered some Russian D9Es from an online vendor. I figure I can use 'em for other projects if they don't pan out for the Klon...

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    Replies
    1. By the way, I am planning to build a Klone using the Aion Electronics PCB, which I purchased a while back. It's a wonderful PCB and the instructions from the website are superb.

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  11. This is no longer on hold?

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    Replies
    1. No, there were a couple of errors in the BYOC schematic which i've confirmed is the case so I'm confident the layout matches the schematic

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  12. Should this be good to go? I'd love to take a stab at verifying this if the corrections have been made

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    1. The original BYOC schematic had a couple of incorrect part values and one connection was different but that turned out to be an error so this should be good to go. It is based obviously on the last Klon layout which was verified by a few people and the changes aren't great so although at least one person doesn't seem to have got it sounding as it should, I'm pretty confident it matches the schematic.

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  13. Thanks Mark. I populated all of the resistors on my board according to the changes you specified in your previous comment from July 26th

    Where any changes made since then? I'll be looking over my board now

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    Replies
    1. I haven't made any since then. The resistor error in the BYOC schematic was a 100K instead of 10K at IC1 pin 5 which I think I always had as a 10K anyway. The cap error was an 82n at Treble 2 which I definitely never had in. My main concern when I saw the BYOC schematic is that they were showing the 15K at IC2 pin 2 connecting at the other side of the 47K at the same pin. But that was confirmed to be an error too.

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  14. You can tag this one. My board is working properly and sounding fantastic

    Thanks for the layout and all of the help Mark!

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  15. I've been playing with this circuit for hours and it sounds amazing :D

    It's pretty tight with great clarity and smooth sustain and dynamics. Buffered bypass sounds great too.

    I'm going to build the OD-820 next since I know some of you guys say it sounds even better than the Klon

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  16. I still haven't boxed this one (enclosures are in the mail), but I took it to rehearsal like this :P

    http://i825.photobucket.com/albums/zz176/Dub-T-123/92A13814-9CD7-4887-89FC-77C3BBBA3090_zpseobczexa.png

    It works amazingly well boosting my ac30 and I left it on the whole time! Even messily wired to my breadboard and cranked up loud this adds almost no noise, just like my friend's original silver Klon :D

    I really recommend this build. The max gain setting isn't quite as good as some other ODs but the low-medium gain settings are glorious!

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  17. And here's my finished build
    http://i825.photobucket.com/albums/zz176/Dub-T-123/290B1FE6-73E2-449C-BA05-6E084F530784_zpspe2jvhdc.jpg

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  18. Not the prettiest shot ever, but here are the guts (I ran out of all wire except red and black at the time lol)
    http://i825.photobucket.com/albums/zz176/Dub-T-123/9E3359F0-8355-4DE1-8364-9DC02693ECAC_zpspbtsndol.jpg

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    Replies
    1. Great job, thanks for the pic matey

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    2. Heeeeeey, these are the f*ckin' knobs i need! Can you tell me where did you get them? Thanks!

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  19. Thanks

    The knobs are Davies. You can get them from smallbear and probably mouser, etc

    If you find the real Davies in that oxblood or white you have to tell me though :P

    ReplyDelete
    Replies
    1. Yeah, sadly on Smallbear they are out of stock as in Musikding or Retroamplis :( I've only seen'em on ebay with massive s&h to Europe, or in Banzai Music (Germany), but these ones are very prone to sell what they don't have in stock and put the item on backorder for several weeks, plus, s&h costs are very high too being in Europe. I'll keep on searching, as Mouser ant their crazy minmums in order not to pay 25$ for s&h are out of scope for me :P

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  20. I got a quote from Davies about getting a batch of oxblood 1470 knobs made. The minimum order is 100, and the price for that is $3.617 each

    So that's not a great deal.

    For 250 the price drops to $2.17 each

    Finally, for 500 knobs the price is $1.428 each.

    So for $500 you're paying about the same per knob as you would for the black ones from smallbear. But I guarantee you could sell a lot of Klones with those oxblood knobs, and I'm sure people would gladly pay $5 each for them. Personally I just want the knobs for looks, and would sell some to cover the cost

    If anyone wants in on a group buy, those are the numbers.

    ReplyDelete
    Replies
    1. I think I'll stay with the Banzai - Smallbear black ones. These prices for a bulk order are crazy, if we don't find 98 people more :P

      J.

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  21. I have a couple of 1N60s from the early 1990s, forward voltage measuring 0.32v. Are these close enough?

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  22. those should be fine. supposedly the russian d9e's are almost dead on to the original. i just measured some of mine and i got forward voltage readings of .45-.55V. the tone may be similar, but the output will be a little lower then if they were the original diodes or d9e's, but it should still sound great. if you want you can put a socket in place of the diodes, and try different diodes until you get something you like.

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  23. Attention: there's an error with a cut, in the image of the empty board:
    Follow the longest link, in the 12th column, down to the 8th row. The cut to the right is 3 columns away in the board with the components, but 4 columns away in the empty board. Right where one of the diodes should go... :(

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  24. Since I verified this with a fixed version of Mark's first layout I didn't notice that mistake with the cut

    You can easily still make this board work though. Put the diode right through the cut and bend the lead so that it lays on the right side of the track when you solder it in

    Or you can move the 47r and diodes over to the right one space

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  25. The top right cut is also differant?

    ReplyDelete
    Replies
    1. Yes, and I missed the previous correction too. Layout now corrected. Thanks for the heads up all

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  26. Hey all!
    What would adding a 500k dual Lin for the gain do to this? It's all I have! Thnx...

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  27. Or could I split it to two 100k Lin pots?

    ReplyDelete
    Replies
    1. Personally I'd do the 2 x 100K lin pots. Using 500K would change the gain too much and it would sound a different pedal. Using two 100K lin pots allows you to alter the dirt and dry sides independently and so could offer some interesting new tones that you couldn't get out of an original Klon, whilst still having the original sounds available to you by just keeping them both at the same point of rotation throughout the sweep.

      Delete
  28. Awesome thnx Ivlark! As for wiring the two pots. Would I wire gain 1-1 to lug 1, gain 1-2 to lug 2 and so on?

    ReplyDelete
    Replies
    1. yeap. just imagine that gain1 and gain2 are two different pots. go as it was gain pot and drive pot.

      Delete
  29. my take on the hypebox numero uno:

    http://s17.postimg.org/3sm2k52wv/IMG_0526.jpg
    http://s17.postimg.org/b7beciosf/IMG_0525.jpg

    not the best overdrive by far, but what a clean boost, wow, sweet bad mama!! jama :o
    25 bucks for a pedal going for 1500 pistoleros cant be bad either :)

    rockett pedals animal overdrive is the greatest there is ;)

    tagboard effects site is the best, and it has become alive again recetlyso kudos to those too!!

    ReplyDelete
  30. I'm getting ready to build this. I have a lot of tantalum 1uf's and was wondering if I could use them in there? If so, what as the polarity on them? Starting from right to left. Thnx so much everyone!!!

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  31. Also, is that a on/on switch? :)

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  32. Ok, figured out both of the above. Found Answers in post of other klon.

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  33. Hey everyone, I've never wired up a dpdt Ina stomp. Can anyone lead me in a good direction? Thnx!!!

    ReplyDelete
    Replies
    1. maybe this is what you looking for?
      i have no idea :)

      https://tagboardeffects.blogspot.se/2012/02/offboard-wiring.html

      Delete
  34. Hi,

    On the schematic there are two 47uF capacitor (c17, c18), and there's only one on the layout. Isn't it a problem?

    Thanks

    ReplyDelete
    Replies
    1. The layout uses a 100uf instead for extra power filtering.

      Delete
  35. Hey Mark,

    This one might be a stupid question, but is there an easy way to modify this layout for true bypass?

    Thanks,
    Almos

    ReplyDelete
    Replies
    1. Yes. Ignore the Sw1, Sw4, Output & Sw5 and Volume 2 & Sw6 wires completely. Omit the two 68K and the 100K resistors at the bottom left of the layout. Also ignore the stomp switch notes shown in the layout.

      You then wire up the stomp switch normally as shown in the offboard wiring layout. The green input wire to the circuit is self explanatory as per the offboard layout, the circuit output then goes directly from Volume 2 to the stomp.

      The LED+ wire can then go straight to the LED, with the other side going to the stomp for indication. Again as per the offboard wiring layout.

      Delete
    2. This comment has been removed by the author.

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    3. Hey Mark,

      Thanks for the layout and the short guide for tbp wiring, after correcting a few bugs it works fine. Since I can't a/b test it with the original I don't know if it's a problem or not, so here's a thing:

      With drive at min and max, it sounds pretty transparent, but in between it sounds a bit darker to my ears. Is it normal, or should I look after some kind of problem in the wiring?

      Thanks a lot again!

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  36. This comment has been removed by the author.

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  37. How would I test this circuit on the test box that is on the site?
    What would I do with the switch wires?

    ReplyDelete
    Replies
    1. You would solder the buffered bypass switch to the ciruit and take the in/out lead to the test box.
      +m

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    2. Any alternative to 1N4742? I have BZV85C 12V zeners, how about these?

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    3. Any 12V zener will be fine.

      However. i'd also suggest taking 100-150R resistor in series with the supply wire. I recently repaired one KTR which had received 12V supply voltage - burning the zener and pump chip with it. One resistor in series with the supply will make the zener able to tame higher voltages and thus, protect the supply circuit way better than stock version.
      +m

      Delete
  38. Ok, thanks! Kiitän, näillä mennään!

    ReplyDelete
    Replies
    1. Eipä kestä. Kannattaa lisätä se vastustus sinne sarjaan kuitenkin, varuiksi...

      Couldn't resist as it's not so common to see other finns here.
      +m

      Delete
  39. For the off board wires Labeled -- Vol2 & Sw6 -- is this technically 1 wire run to VOL2, then another wire run from VOL 2 to Switch position 6?

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  40. Is Gain 2 POT technically the Treble POT?

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  42. I'm getting the following voltages from the IC pins on my build:

    IC1
    4.8
    4.8
    0.8**
    0
    4.6
    4.8
    9.2**
    9.2

    IC2
    5
    4.8
    4.7
    -8.9
    4.7
    4.7
    4.7
    17

    IC3
    9.2
    4.6
    0
    -4.5
    -8.8
    5
    4.2
    9.2

    The pins marked ** are the trouble spots. The value at pin 3 is especially perplexing since the only thing between it and the +Vb (4.5V) is a 1M biasing resistor. I double checked the resistor and it does measure to be 1 MOhm.

    The pin 7 value is way too high. I first thought there may be a bridge somewhere between it and the next pin 8, but there is no continuity between the two so that's not it.

    Is the under voltage at pin 3 causing the overvoltage at pin 7? Any ideas where the trouble could be coming from?

    ReplyDelete
  43. It appears that IC1 is faulty. After swapping 1 and 2 the voltage problems followed the chip. I'm getting replacements today and will verify that the chip was the issue.

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  44. The IC was bad. All my voltages look good now!

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  45. Now that I've got a functioning pedal, I notice that if the Treble and Gain are both turned up I get a high pitched squeal, even if I hold the strings muted. If I back the gain down a bit I can leave the Treble full, or I can back off on the Treble and keep the Gain at full. Is this expected behavior?

    I'm thinking of changing the C14 cap to 6.8nF to allow more bass response. Not sure if that will alleviate the squeal though. Maybe increase R21 to tame the highs?

    Any thoughts?

    ReplyDelete
  46. Hi guys. I am having some troubles with this build and I hope that someone helps me out. I get no sound out of the pedal, only some weird oscillations.

    This are my measured voltages:

    (9.18 POWER SUPPLY)

    IC1
    9,17
    4,79
    0
    -3,71
    -7,45
    5,20
    4,64
    9,17

    IC2
    6,80
    7,25
    7,18
    -7,50
    7,24
    7,26
    7,50
    9,51

    IC3
    8,48
    8,48
    7,48
    7,79
    7,27
    7,45
    8,60
    0

    If you need some pictures of the build i can shoot some.

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  47. I've just started building this layout and have used multilayer monolithic caps for the 1uf caps. Will these be ok or should I replace them with 1uf electrolytic caps?

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  48. Any 1uf should be fine, but don't take me too seriously since I built it with electros and it doesn't works. I am still waiting someone who helps me out ...

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  49. Hi guys, I'm really struggling with this one. When I connect the power IC3 is getting really hot and I'm getting oscillating noises from the pedal. Any ideas why this is happening?

    ReplyDelete
    Replies
    1. Are you using a 7660s? If you're using a 7660, you'll typically get oscillation and heat.

      Delete
  50. So I rebuilt the circuit as I found a couple of faults. I now get a full sound when the pedal is bypassed but only a very very weak/quiet signal when engaged. Any ideas?

    ReplyDelete
    Replies
    1. my voltages if this helps:
      IC1
      1: 4.72
      2: 4.72
      3: 3.62
      4: 0
      5: 9.43
      6: 4.72
      7: 4.72
      8: 4.71

      IC2
      1: 4.72
      2: 4.72
      3: 4.71
      4: -9.02
      5: 18.03
      6: 4.71
      7: 4.71
      8: 4.71

      IC3
      1: 9.43
      2: 4.75
      3: 0
      4: -4.45
      5: 9.43
      6: 7.22
      7: 4.66
      8: -9.02

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    2. Looks like you are numbering your pins wrong. What you have as pin 5 reading is pin 8 actually. Voltage don't seem far off to me if that is the case. Chase the signal through the circuit. My cheap dirty sniffer was my iPhone into the was my amp and putting a signal into the pedal with my iPhone and an adapter. Any audio will do. Solder a wire to the output jack. The a cap to the other end to act as a do block. Use the unsoldered end to sniff the circuit. Use the schematic and layout to find your way. I found a solder bridge causing my issue.

      Delete
  51. Hey iviark and the rest of my fellow pedal geeks. Getting tired here. Just built this thing and found a few issues already. But now I'm almost there. When the gain is full sounds good and loud. When I turn the gain down I loose lots on volume and as I approach the 0 gain the level creeps back up to a similar level as full dirt but clean. As I said tired and going to bed. Hoping someone can point me in the right direction by the time I finish work tomorrow. I suspect I have a solder bridge or a bad solder joint somewhere.

    ReplyDelete
    Replies
    1. Oh and love all the layouts.. my favourite site by far

      Delete
  52. Hey guys, just built this and it was working for an hour or so, i hadnt properly mounted the board and it would cut in and out when i moved the pedal and now theres nothing at all. when it is bypassed i get a clean signal coming through but as soon as i engage the led comes on and it goes silent with a tiny bit of clean signal bleed if i crank the amp. i have gone through and checked solder joints etc, any ideas?

    I had a go at measuring the ic's
    9.48 power supply

    Ic1
    5.64
    5.64
    5.03
    1.8
    5.66
    5.68
    5.89
    9.48

    Ic2
    7.86
    5.7
    5.65
    6.16
    5.65
    7.46
    7.87
    8.45

    Ic3
    9.48
    6.4
    2
    5.73
    6.16
    6.33
    6.5
    9.48

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  53. Maybe silly question, but can i get away with using a 1n4744?

    ReplyDelete
  54. Got this built, tight squeeze because of how i like my pedals laid out, but managed to get it to fit by laying down caps. I quite like the pedal, especially when combined with other pedals. The purple plexi combos great with it in my opinion.

    I used 1N4001, 1N4742A, and 1N34A for my diodes. The 1N34A aren't great if you're looking to get that exact Klon sound, but they sound alright.

    When I first got mine assembled I accidentally used a ICL7660 instead of the required ICL7660S, whoops. There was a high pitched whine, so if you have that problem double check you have the right IC. Once I got the right IC it fired right up.

    Boxed in a 125b, I went for the classic brown and silver look. https://imgur.com/a/6hyyM

    Thanks for the layout IvIark!

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  55. Is there a simple way to add a switch to kill the clean mix, so that I could see what the clipping sounds like on its own?

    ReplyDelete
  56. Hello,
    I've got the archer and infortunatly powered it 18V instead of 9V...
    I haven't any signal yet :'(
    Does anybody have an idea about wich component should have blown first ?
    Thanks

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  57. OK, I finished mine as shown in the diagram. No substitutions. It works. Its right. But I am left asking, this is what the hype was all about? The only good sounds I can get is with tone down between 0 and 1. Any higher than that and it is too shrill to be usable. Granted this is at loud bedroom levels, not stage levels. I've seen people talk about how the klon only really shines if you can open the amp up wide.....but still, there is so much treble.....does anyone have any thoughts for me?

    ReplyDelete
  58. Late to the party as usual..........

    Built two pedals - the Klon with buffer and the MXR DynaComp. Took a side bet with the wife that the Klon would fail first time but the DynaComp is so easy, you'd have to try hard to get that one wrong. So, guess what happened?

    Yup, Klon started up first time and the DynaComp is lying in a dusty corner of my workshop, waiting for me to sort it out or re-build the bloody thing.

    Klon sounds good at low gain settings - makes the sound 'bigger and wider' somehow - bit like when I kicked in the Fulltone FatBoost. It is a bit nasal/cocked wah-sounding on the higher gain settings though - would messing with diode values change this? or do I need to look at the caps? Or do I just need to keep building overdrive pedals until my board is ten feet wide?

    Equal amounts of joy/exasperation/enlightenment/surprise/booginess, as I steadily work my way through the many, many pedal circuits you lovely people have produced. Mind you, the neighbours don;t take kindly to me road-testing gain pedals at 11pm - might need to insulate the workshop.............

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  59. Hey any chance to see here the Rev 2.0 from byoc? The one with added switches. All their pcb are sold out unfortunately

    ReplyDelete
  60. Probably a daft question, but what exactly is the DPDT switch for?

    ReplyDelete
    Replies
    1. Oh wait hang on. That's the foot switch isn't it? Can I just use two 3rds of an 3PDT?

      Delete
  61. Just built the bare bones had the standard not loud enough/unity gain issues so I built this and got the same issues. My 7660s’ whine but I think that’s down to faulty batch I got. Substituted a few parts that was within good range, nothing crazy. But yeah gain on zero and need to crank the volume just to get unity. Sweep of the gain is fine but it’s missing the boost aspect I was looking for. Any ideas?

    ReplyDelete
  62. Hello, this is an old post, but still. I see in the layout "SW4" appears in 2 different places. One at the top right and another at the bottom left. Which one is good?

    ReplyDelete
    Replies
    1. Both need to be connected to SW4

      Delete
    2. That was my guess, but thanks! You saved me some head scratching.

      Delete

  63. Hi!
    I've been making Silver Edition recently, but I have doubts.

    What's the point of changing R10 from 2K to 43R in Silever Edition?
    I think this change has the negative effect of reducing the change in gain from 7 o'clock to 10 o'clock.

    ReplyDelete
    Replies
    1. Here's a list of what the different values do:

      More gain
      - R3: 47ohm (stock is 2k)
      Increased volume & treble for clean signal
      - R13: 10k (stock is 27k)
      Tweaked wet/dry ratio on Gain knob
      - R14: 4.7k (stock is 12k)
      Shift range of Tone knob
      - R21/R23: 1.8k/4.7k (stock is 4.7k/1.8k)
      Slight increase in overall brightness
      - C12: 560p (stock is 820p)

      I'm planning to build one this week. Personally after reading alot up on this I've decided to make it as gold but with the 43R instead. Going to also add the fat switch, diode changes from the rev 2 vero and I've also sketched out a boost switch/knob too that's inspired by BYOCS Silver Pony II. Keeping treble 1/3 as they originally were, I think it's going to make the Klon muddy (and maybe part the reason why the other values were changed to add brightness and treble back in)

      Delete
  64. I had a look at the schematics for Silver Pony on BYOC and they don't have the corrections that are listed on the one on this post? The parts on the silver ponies they sell look exactly to look exactly the same as the gold?

    ReplyDelete
  65. I've answered my own question...

    From BYOC themselves.
    "BYOC Silver Pony
    "In 2014, Keith from Build Your Own Clone degooped a silver Centaur (serial S2207) and released a kit called the Silver Pony. Keith found a number of discrepancies from the Soulsonic schematic, which were attributed to Gold vs. Silver differences. This was latched onto by the DIY community, and these “Silver Specs” changes were widely distributed within a few days of his posting.

    However, someone later pointed out that of course S698 was a Silver as well, so we were definitely not looking at the “Silver Specs”, at least not in a manner that contrasted with S698’s “Gold Specs” as was commonly claimed for awhile. In retrospect, no one’s quite sure what to make of the Silver Pony situation, whether the trace was inaccurate or whether it was an experimental unit built by Bill—which was not unheard of.

    So the “Silver Pony specs” are as a curiosity, maybe worth socketing and testing out if you’re interested. Some people definitely like it, but just know that it’s not representative of a silver Klon Centaur. The BYOC Silver Pony kit was discontinued in early 2015"

    So the alterations are NOT a silver Centuar, and the treble 1/3 situation is wrong. It was correct in the original schematics and the one Keith had was likely the wrong one, meaning it's now wrong in all over Klon builds here too?

    ReplyDelete
  66. Any ideas of how I can wire this one up to a soft patch true bypass relay?

    ReplyDelete