tag:blogger.com,1999:blog-6847048658257278783.post9178104743145066615..comments2024-03-27T15:26:01.893+00:00Comments on Guitar FX Layouts: MXR Blue BoxIvIarkhttp://www.blogger.com/profile/08416945174853142251noreply@blogger.comBlogger129125tag:blogger.com,1999:blog-6847048658257278783.post-46282644121425867502022-08-24T12:45:44.245+01:002022-08-24T12:45:44.245+01:00hi everyone, i am working on john k's version ...hi everyone, i am working on john k's version of this.<br /><br />i am getting a loud oscillating whining noise, that responds to the two pots, as well as the octave selector switch—the noise changes by an octave when toggled. i am also able to hear the guitar signal underneath the noise, the guitar signal is very quiet, at least half the volume of the whining noise. the guitar signal does seem like it is effected, as i feel like i can hear the fuzz and octave.<br /><br />the noise is still present even if i connect the output jack to the input point of the board, as long as the battery is connected.<br /><br />the battery is new, i have swapped out the two ics, and checked over my board, it doesn’t look like anything is out of order…<br /><br />what seems to be the problem here?<br /><br />any help would be greatly appreciated, thanks so much in advance!aavanhttps://www.blogger.com/profile/14849977976254352968noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-22481926945783339542022-08-24T12:41:59.960+01:002022-08-24T12:41:59.960+01:00This comment has been removed by the author.aavanhttps://www.blogger.com/profile/14849977976254352968noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-80829737162585088742019-02-20T20:39:57.133+00:002019-02-20T20:39:57.133+00:00Woops! Read my IC's wrong. It was late.
IC1 r...Woops! Read my IC's wrong. It was late.<br /><br />IC1 reverse the order of 5-9.<br />IC2 reverse the order of 8-14.Anonymoushttps://www.blogger.com/profile/04152711895782206701noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-9067343568623878282019-02-20T11:40:42.355+00:002019-02-20T11:40:42.355+00:00Hi all, having trouble getting this one working. I...Hi all, having trouble getting this one working. I've triple checked all cuts and links, resistor and cap values, component placement, polarity and cleaned down channels to break any shorts. Tested with wall wart measuring 9.5v.<br /><br />IC1<br />1 - 4.8<br />2 - 4.8<br />3 - 2.4<br />4 - 0<br />5 - 9.5<br />6 - 5.4<br />7 - 4.4<br />8 - 4.5<br /><br />IC2<br />1 - 4.8<br />2 - 4.8<br />3 - 4.7<br />4 - 0<br />5 - 4.7<br />6 - 0<br />7 - 0<br />8 - 9.5<br />9 - 4.7<br />10 - 4.7<br />11 - 4.3<br />12 - 0<br />13 - 4.7<br />14 - 0<br /><br />Trannies<br />Left: E-0, B-0.2, C-0.9<br />Middle: E-0, B-0.2, C-2<br />Right: E-0, B-0.5, C-4.3<br /><br />Have built a few pedals in the past but still consider myself a novice. Any help would be appreciated!Anonymoushttps://www.blogger.com/profile/04152711895782206701noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-44897967773599093932018-11-18T22:50:17.657+00:002018-11-18T22:50:17.657+00:00This was on my to-do list for years and today I de...This was on my to-do list for years and today I decided it was about time.<br />Not having a single 56k resistor didn't stop me, so replaced them all with 51k's. <br /><br />Tried JRC4558 and TL072, and Toshiba 4013 and TL074.<br />The 4558+4013 won the comparison (not huge difference), but might try again after removing the dotted 56k resistor at them bottom.<br /><br />With single coils and at ceryain settings it gets a bit sputtery, like some transistor was not properly biased.<br />Maybe I will play a bit with an assortment of trimmers and see what happens.<br /><br />Great layout!Jorgehttps://www.blogger.com/profile/16491964855826091205noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-11852181811990333612018-11-18T22:49:43.649+00:002018-11-18T22:49:43.649+00:00Great to know! That explains mine's behavior. ...Great to know! That explains mine's behavior. Will definitely remove that resistor tomorrow, I could use more octabe ;) though I love this thing already.<br /><br />Jorgehttps://www.blogger.com/profile/16491964855826091205noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-59355092819722824022018-07-26T14:20:11.554+01:002018-07-26T14:20:11.554+01:00I MEANT to say:
If you leave it out entirely (not...I MEANT to say:<br /><br />If you leave it out entirely (not jumper it) you can get the blend to go from full on fuzz to full on octave, which is what is shown in the video, and for me, is preferable. Andrehttps://www.blogger.com/profile/14524174067233323780noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-30845269421937061952018-07-26T14:18:58.395+01:002018-07-26T14:18:58.395+01:00FYI, on the noted 56K resistor on the bottom: It ...FYI, on the noted 56K resistor on the bottom: It bleeds fuzz over to the octave side of the circuit right before the blend. It won't hurt the working of the effect to leave it, but then you can't get 100% octave sound on that side of the blend. With it you go from full fuzz to half fuzz, half octave.<br /><br />If you leave it out entirely (not jumper it) you can get the blend to go from full on fuzz to full on blend, which is what is shown in the video, and for me, is preferable. <br /><br />Not sure why MXR ever put that in there, if they ever did. It may have been because of some circuit change that doesn't matter to us, or maybe it was someone's preference for DIY, and it became canonical.<br /><br />Anyway, leave it out.Andrehttps://www.blogger.com/profile/14524174067233323780noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-75234799576753486952018-02-26T15:04:50.491+00:002018-02-26T15:04:50.491+00:00I've built this twice now - the first one didn...I've built this twice now - the first one didn't work at all, and the second gets very low volume input, with some super deep buzz overpowering the signal. Occasionally you hear the chip working but it takes a couple of seconds and 'buggily' gets down an octave. Really frustrating. Is this a common issue?Anonymoushttps://www.blogger.com/profile/14465120830980907164noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-26359726628372664042017-08-02T21:19:22.121+01:002017-08-02T21:19:22.121+01:00Has anybody run into the issue of the effect worki...Has anybody run into the issue of the effect working but its really gate-y sounding and fizzy almost like a gated fuzz. when I listen to a demo of the real pedal it sounds much cleaner and the octave sounding really clear. Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-65824818040582894642017-02-28T22:44:28.825+00:002017-02-28T22:44:28.825+00:00Thanks martin I will try that asap. I had a hard t...Thanks martin I will try that asap. I had a hard time believing the chip was bad I swapped like 5 in there. <br /><br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-41096640916335738872017-02-28T22:23:27.231+00:002017-02-28T22:23:27.231+00:00hey alex, I'm having issues on this one as wel...hey alex, I'm having issues on this one as well (sounds like yours just that i definitely get some kind of octave and even the double switch seems to work). well, after swaping the ics a million times now with no result i will try to change the 47nf cap behind ic1 to tandalum as soon as i get a hold of. it says that it's supposed to be one in the schematic mentioned aboved.<br />maybe you wanna try that as well and let me know if it has gotten any better. I'll also post my results.<br />cheers, martinmardnhttps://www.blogger.com/profile/12792878730058736927noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-35471888867863984372017-02-20T03:57:01.330+00:002017-02-20T03:57:01.330+00:00This comment has been removed by the author.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-4089104021966526672017-02-20T03:50:09.256+00:002017-02-20T03:50:09.256+00:00Hello. I built this layout twice now and both time...Hello. I built this layout twice now and both times it didnt work. When in bypass it works fine but when engaged I hear a fizzy dying battery fuzz and no octave at all.instead I hear alot of weird noises as well mixed into the fuzz sound I am using TL072 and the JRC chip for ic 1 and CD4013B chip. I have put 5 chips in and still the same result. Can somebody tell me what chips they are using and what if any modifications were done to make it work. Thank youAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-50018485388567821262017-02-20T03:48:52.634+00:002017-02-20T03:48:52.634+00:00This comment has been removed by the author.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-76122691455996128872017-01-07T23:32:35.614+00:002017-01-07T23:32:35.614+00:00here's the pic...
http://i117.photobucket.com/...here's the pic...<br />http://i117.photobucket.com/albums/o63/notasmine/IMG_5332.jpegmardnhttps://www.blogger.com/profile/12792878730058736927noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-55814414980256022232017-01-07T23:28:21.450+00:002017-01-07T23:28:21.450+00:00hey there,
i'm having a hard time to get thing...hey there,<br />i'm having a hard time to get thing to work. bypass is absolute clear. when turning on there's a bad fuzz sound on and the signal is dying like seconds after strumming the guitar.<br /><br />i did an audio probe and think that the problem is already at ic 1. out 1 (pin1) sounds like a good fuzz with no dying and out 2 (pin 7) has the bad fuzz with the dying tone on it.<br /><br />here's the voltages...<br /><br />ic1<br />pins in Volts<br />1 - 4,0<br />2 - 4,08<br />3 - 3,8<br />4 - 0<br />5 - 3,9<br />6 - 3,9<br />7 - 4,7<br />8 - 7,8<br /><br />ic2<br />pins in Volts<br />1 - 7,4<br />2 - 3,8<br />3 - 3,6<br />4 - 0<br />5 - 3,8<br />6 - 0<br />7 - 0<br />8 - 0<br />9 - 5,2<br />10 - 0<br />11 - 3,4<br />12 - 3,4<br />13 - 3,6<br />14 - 7,8<br /><br />transistor from left to right in Volts<br />left C-0,63 B-0,2 E-0<br />middle C-0,42 B-0,3 E-0<br />right C-3,35 B-0,46 E-0<br /><br />can you guys read anything bad out of this or have any suggestions where to look?<br />i'll post a link to a picture of the board as well.<br /><br />hope to find an answer cause i don't wanna give up on this.<br />thanks and cheersmardnhttps://www.blogger.com/profile/12792878730058736927noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-72057475942436551782016-03-15T13:07:29.214+00:002016-03-15T13:07:29.214+00:00This comment has been removed by the author.napper29https://www.blogger.com/profile/08492067325131101400noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-4513477265434499052016-03-15T01:34:45.076+00:002016-03-15T01:34:45.076+00:00This comment has been removed by the author.napper29https://www.blogger.com/profile/08492067325131101400noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-20819081942883150042015-08-29T18:03:06.879+01:002015-08-29T18:03:06.879+01:00Hi gentlemen,
I'm having a head-scratcher wit...Hi gentlemen,<br /><br />I'm having a head-scratcher with this. I've got it sounding beastly but mine doesn't seem to have a strong octave, it's definitely there but the fuzz drowns it out, even with the blend all the way off its still not very strong.<br /><br />I used an HEF 4013BP could this be the issue?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-10138792129702294132015-04-13T16:55:02.950+01:002015-04-13T16:55:02.950+01:00hola... yo hice la version casi original replicand...hola... yo hice la version casi original replicando la placa..... y me suena muy suave..... tengo que revisar y si no anda bien repetire todo pero esta version veroboard<br /><br />hello ... I did almost original version replicating the plate ..... and it sounds very smooth ..... gotta check and if not right repeat everything but this version veroboardBRAVEWOLFhttps://www.blogger.com/profile/14856398178799198311noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-91430340196511888232015-04-13T01:13:54.936+01:002015-04-13T01:13:54.936+01:00Hey yes it's a double connection. The level 2 ...Hey yes it's a double connection. The level 2 connects to the board and the output.Anonymoushttps://www.blogger.com/profile/06201678011261105677noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-81374592183282195422015-04-12T21:25:32.056+01:002015-04-12T21:25:32.056+01:00I just finished my build of John's version. I ...I just finished my build of John's version. I have a question about the level pot. There is a lead coming from the board that is labeled Level 2 but in the notes it also says Level 2 to output. Is this a double link( board to the pot and then out , on the same lug) Any help would be appreciated.Anonymoushttps://www.blogger.com/profile/07206893320026549656noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-45355411068499758802015-04-12T21:25:19.585+01:002015-04-12T21:25:19.585+01:00I just finished my build of John's version. I ...I just finished my build of John's version. I have a question about the level pot. There is a lead coming from the board that is labeled Level 2 but in the notes it also says Level 2 to output. Is this a double link( board to the pot and then out , on the same lug) Any help would be appreciated.Anonymoushttps://www.blogger.com/profile/07206893320026549656noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-64769620932522492332015-04-12T21:24:51.067+01:002015-04-12T21:24:51.067+01:00I just finished my build of John's version. I ...I just finished my build of John's version. I have a question about the level pot. There is a lead coming from the board that is labeled Level 2 but in the notes it also says Level 2 to output. Is this a double link( board to the pot and then out , on the same lug) Any help would be appreciated.Anonymoushttps://www.blogger.com/profile/07206893320026549656noreply@blogger.com