tag:blogger.com,1999:blog-6847048658257278783.post8657380908004355025..comments2024-03-27T15:26:01.893+00:00Comments on Guitar FX Layouts: Catalinbread SCODIvIarkhttp://www.blogger.com/profile/08416945174853142251noreply@blogger.comBlogger39125tag:blogger.com,1999:blog-6847048658257278783.post-32845854895203195422021-10-16T15:49:46.530+01:002021-10-16T15:49:46.530+01:00So I dipped my toe into this SCOD mystery too... :...So I dipped my toe into this SCOD mystery too... :)<br />Actually I built this years ago and boxed it, but I can't recall having any "issues" with it. I never thought of it as a outstanding overdrive either.<br />Recently I've been overhauling all my pedals, just to see if there's anything to improve and stumbled across this one also. The sound wasn't very useful and the contour wasn't really doing anything (I'm just repeating the postings above here :D ). Had a browse through the webs and the contour pot is actually quite subtle in the original pedal also, so I'm not going to count that as malfunction. After eyeing the schem a while I decided to socket the 100uF cap in the low left corner (Q1 source -> GND). I tried from 47uF all the way to 1uF and around 4,7uF it started to sound good enough with my LP to make the pedal actually usable. Ofcourse this cuts the overall gain too, but I saw nothing wrong with that since I had loads of gain to start with (though I have loaded my LP with high gain humbuckers). I also felt that the contour pot became a bit more usable with lower gain. In the end I decided to make that cap selectable with a switch and now I have the original setup with 100uF and lower gain with 1uF.<br />I recommend to everyone building this to socket the mentioned 100uF cap and find a suitable value for your setup!Jupnitski77https://www.blogger.com/profile/11582075821084193973noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-819612448133071532018-04-20T04:47:20.233+01:002018-04-20T04:47:20.233+01:00Sorry for multiple deletes and links. Figuring out...Sorry for multiple deletes and links. Figuring out how to use Dropbox app etc. The second link should work. Thommohttps://www.blogger.com/profile/08323108483853432376noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-69231128718216651762018-04-20T04:37:38.954+01:002018-04-20T04:37:38.954+01:00This comment has been removed by the author.Thommohttps://www.blogger.com/profile/08323108483853432376noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-34303387252281436732018-04-20T04:34:44.233+01:002018-04-20T04:34:44.233+01:00https://www.dropbox.com/s/savuvrd9ie1nnna/IMG_2018...https://www.dropbox.com/s/savuvrd9ie1nnna/IMG_20180419_112403.jpg?dl=0Thommohttps://www.blogger.com/profile/08323108483853432376noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-41414804291970910362018-04-20T04:30:31.985+01:002018-04-20T04:30:31.985+01:00This comment has been removed by the author.Thommohttps://www.blogger.com/profile/08323108483853432376noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-63124278966660542992018-04-20T04:24:46.123+01:002018-04-20T04:24:46.123+01:00OK, I did a bit of experimenting and it seems to b...OK, I did a bit of experimenting and it seems to be that the circuit will work with nothing in that spot but not as it should. I found that ANY size cap does nothing to the way it is. Put a jumper in there and boom! There's your volume! Gain pot sweep is altered a bit. Maxes out at around 2/3-3/4 but Max gain is the same. Here is a pic of the cap:<br />https://www.dropbox.com/s/savuvrd9ie1nnna/IMG_20180419_112403.jpg?dl=0<br />Cheers, Thommo. <br />Thommohttps://www.blogger.com/profile/08323108483853432376noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-13808433061498499342018-04-19T03:41:36.646+01:002018-04-19T03:41:36.646+01:00OK guys, I did a bit of poking around with my audi...OK guys, I did a bit of poking around with my audio-probe(surely there has been someone else who has done this on this circuit) and found significant signal loss after the 5nf cap going into the gain pot(I think). I removed this cap and put in a jumper and BOOM! all the volume one could want. This also seemed to make the Contour control a little more noticeable. I was chatting to someone recently who own an original scod and he said unity was around 11 o'clock. Which now seems to be the case for my circuit. Removing that cap may have affected the gain pot sweep but I'll have to do a bit more testing to be sure. This is an old thread, so I hope people see this and give it a go. Thommohttps://www.blogger.com/profile/08323108483853432376noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-17836025200691538972018-02-27T03:02:58.214+00:002018-02-27T03:02:58.214+00:00I just replaced the 1meg with the 1.7meg. If it ma...I just replaced the 1meg with the 1.7meg. If it made a difference it wasn't much. Maybe a bit more volume, but not 100% sure!Thommohttps://www.blogger.com/profile/08323108483853432376noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-89718667366048375552018-02-21T14:19:00.629+00:002018-02-21T14:19:00.629+00:00Thanks for the reply Craig! I did a bit of searchi...Thanks for the reply Craig! I did a bit of searching and found a few forum posts about the Contour control being quite subtle. Only really being apparent with the gain and volume pretty much dimed. I tested mine again through some speakers(don't have an amp ATM)and it does work. Just very subtle. Someone said it's supposed to give a looser(cw) or a tighter(ccw) feel to the low end. Which, I would tend to agree with. But like I said, it's very subtle.Thommohttps://www.blogger.com/profile/08323108483853432376noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-64206699752981502272018-02-19T02:24:25.970+00:002018-02-19T02:24:25.970+00:00Someone posted a perf layout to the Open Chat sect...Someone posted a perf layout to the Open Chat section (http://guitar-fx-layouts.42897.x6.nabble.com/Catalinbread-SCOD-td35103.html) but it's different than the layout above, and no one ever responded.<br />Craighttps://www.blogger.com/profile/10538642746718654644noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-2637305799150010512018-02-16T23:22:56.995+00:002018-02-16T23:22:56.995+00:00Hey guys, I built this one a fair while ago and ha...Hey guys, I built this one a fair while ago and have only just plugged it in after about 3-4 years! I have no problem with the sound or how much gain it has, in fact it sounds great! But.....my Contour control seems to do nothing at all. I haven't watched any demos so not sure if it's just subtle or I have a problem. Thommohttps://www.blogger.com/profile/08323108483853432376noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-90316117253901500662018-02-07T04:03:28.727+00:002018-02-07T04:03:28.727+00:00Anyone had success with the above suggestion? Anyone had success with the above suggestion? Craighttps://www.blogger.com/profile/10538642746718654644noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-71008134742004879682015-02-20T12:56:30.977+00:002015-02-20T12:56:30.977+00:00following the link above try 1M7 in place of 1M, a...following the link above try 1M7 in place of 1M, at IC rightborattohttps://www.blogger.com/profile/00102211964316265559noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-44383597810222242912015-01-12T19:48:50.931+00:002015-01-12T19:48:50.931+00:00Hi guys, i found a perf layout... maybe it can hel...Hi guys, i found a perf layout... maybe it can help http://blogs.yahoo.co.jp/mitani518/folder/1181531.html?p=2borattohttps://www.blogger.com/profile/00102211964316265559noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-9320539808263696032014-12-28T22:57:16.434+00:002014-12-28T22:57:16.434+00:00Removing the tag and putting it on hold. No ideas ...Removing the tag and putting it on hold. No ideas at the moment...<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-54880140522659371792014-12-28T21:15:54.014+00:002014-12-28T21:15:54.014+00:00100k trimmer installed - very little change. I'...100k trimmer installed - very little change. I'm leaning towards erroneous schematic as well. Im going to dig around some more. I know this pedal is essentially a nut cruncher sandwiched between two MOSFET boosters. If you have any ideas I'm all ears. Thanks!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-85040706793946025322014-12-25T21:12:55.043+00:002014-12-25T21:12:55.043+00:00Thanks for the quick response. I'll try out a ...Thanks for the quick response. I'll try out a 100k trimmer and see what happens. Stay tuned! Also Merry Christmas!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-10444970499474319332014-12-25T17:21:06.869+00:002014-12-25T17:21:06.869+00:00On FSB, R Customs says the schematic is verified a...On FSB, R Customs says the schematic is verified and both, R Customs and Madbean schematics are the same. Layout matches the available schematics. People on FSB have had same issues as you with their builds, no matter if they were from mine or Mictester's layout, or from R Customs PCB. On the other hand, Mictester has slight mod that sets the gate bias voltage for the MOSFETs. You could try taking the 62k out and replacing it with a 100k trimmer to see if that sorts it. You did use 62k resistor? If that doesn't sort it, i'm leaning towards erroneous schematic.<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-58685798489012004822014-12-24T18:39:47.591+00:002014-12-24T18:39:47.591+00:00Should say mimics, not Monica. Thanks autotype!Should say mimics, not Monica. Thanks autotype!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-961734527013708402014-12-24T18:36:45.560+00:002014-12-24T18:36:45.560+00:00I'm wondering if the verified tag should be re...I'm wondering if the verified tag should be removed from this layout. My build has the same problems that other people have noted - lots of volume, but very little gain compared to an original or any of the demos I've heard. Thoughts? Has anyone had a successful build that Monica an original unit?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-9508744585591101602014-12-01T11:56:44.284+00:002014-12-01T11:56:44.284+00:00Wow, thanks for the fast reply!Wow, thanks for the fast reply!Anonymoushttps://www.blogger.com/profile/17679714280167257093noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-24260827605447785972014-12-01T09:49:43.644+00:002014-12-01T09:49:43.644+00:00Doesn't matter. There may be differences in vo...Doesn't matter. There may be differences in voltage rating as in 100V vs. 1000V and how much power they can take, but none of those matter in this application. Use what you have.<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-39273192280861041352014-12-01T00:43:29.940+00:002014-12-01T00:43:29.940+00:00There's different types of 9.1V zeners.(1N5346...There's different types of 9.1V zeners.(1N5346B, ZMM00, BZX83V00, BZX85V00, KS191A, KS191C, KS191T, ZY). Any difference which one I use?Anonymoushttps://www.blogger.com/profile/17679714280167257093noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-46333783724590103932013-04-27T21:21:31.961+01:002013-04-27T21:21:31.961+01:00Thanks for the reply Jon. I actually went over and...Thanks for the reply Jon. I actually went over and read the full post at FSB. They actually said almost the same same thing as I experienced with my build. It's not a bad sound - just not exactly what I had expected. I do play Strats so I know I'm going to be getting a little less output from my single coils ( or a lot less if it's my Vintage style Fralins - but they sound sooo good clean! ).<br /><br />Don't worry man - I'm not disheartened - I've built about 40 pedals from here and about 70 or so overall including Sabro's site. I've had too many great pedals ( thanks ALWAYS to Mark and Mirosol !!) to be too disappointed about a couple of duds here and there ( you gotta build the Magna Vibe - that one was crazy better than I expected ). Plus I learn something new from each build. <br /><br />I believe it's on to the Frantone Cream Puff next.... <br /><br />Thankstinkercreakhttps://www.blogger.com/profile/13582923070173204110noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-34746423780304108052013-04-27T20:59:06.473+01:002013-04-27T20:59:06.473+01:00Just thought I'd add, The amount of distortion...Just thought I'd add, The amount of distortion you get will vary with the type of Guitar pickups and Amps you play on. The best distortion I actually get at Bedroom Levels is through a Noisy Cricket MkII Amp I built from this site. It is great I reckon for replicating what pedals are capable but can only be used at low volume. Things change and the pedals react differently on the Bigger Fender & Marshall etc Amps.Anonymoushttps://www.blogger.com/profile/09108068585463420887noreply@blogger.com