tag:blogger.com,1999:blog-5481402030233340127.post7687116673392308800..comments2024-03-28T01:15:58.057-04:00Comments on Perf and PCB Effects Layouts: MXR Micro Chorusdtgehringhttp://www.blogger.com/profile/09555201436004501222noreply@blogger.comBlogger80125tag:blogger.com,1999:blog-5481402030233340127.post-78612934804022100612023-10-09T14:52:48.075-04:002023-10-09T14:52:48.075-04:00I can verify this as well, with the corrections pe...I can verify this as well, with the corrections people have suggested above. Here's what I did for mine:<br /><br />1. Swap the 100K resistor at K8 and the 7K5 resistor at L9<br />2. Omit the 47K resistor at H12<br /><br />With a BL3208A, this gave me a chorus sound, and adjusting the trimpot allowed me to dial it in by ear. Sounds great!Skajaquadahttps://www.blogger.com/profile/17870368072697547682noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-72338878890460842432022-11-21T12:44:51.518-05:002022-11-21T12:44:51.518-05:00I can confirm it's working and sounds ok. I us...I can confirm it's working and sounds ok. I used the trimmer instead of the bias resistors of the bbd chip as someone suggested. Does anyone know the right voltage for the tl062 trimmer if there is one?chris lahttps://www.blogger.com/profile/08668099953027183407noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-78568002165565759622022-09-16T23:19:00.648-04:002022-09-16T23:19:00.648-04:00https://drive.google.com/file/d/1ZH51OzTmgdoPrwXS1...https://drive.google.com/file/d/1ZH51OzTmgdoPrwXS1H1OMMFxilt6Pryb/view?usp=sharing<br /><br />anyone tried this method?Hectorhttps://www.blogger.com/profile/03135028719628146126noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-90110075286564928292022-09-16T23:18:24.442-04:002022-09-16T23:18:24.442-04:00https://drive.google.com/file/d/1ZH51OzTmgdoPrwXS1...https://drive.google.com/file/d/1ZH51OzTmgdoPrwXS1H1OMMFxilt6Pryb/view?usp=sharing<br /><br /><br />is this correctHectorhttps://www.blogger.com/profile/03135028719628146126noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-62704568680231024422022-06-24T23:47:50.895-04:002022-06-24T23:47:50.895-04:00After building this circuit numerous times with th...After building this circuit numerous times with the V3207 and getting that ticking noise out of every one of them... I finally got my hands on a real MN3207 and built this again... No ticking, just a nice, lush chorus. So, the V3207 is the culprit for the ticking. If you can get your hands on real MN3207's, you will have yourself a nice chorus.Analog Pedalshttps://www.blogger.com/profile/01250574704478675955noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-1108756614074529532022-04-21T00:38:05.836-04:002022-04-21T00:38:05.836-04:00Had all sorts of trouble with this one. Anyway I p...Had all sorts of trouble with this one. Anyway I put together a circuit provided by Monje...<br />https://www.dropbox.com/s/3w16vrdui5ai8m8/MXR%20MICRO%20CHORUS%20MN3207.pdf?dl=0<br />And it's probably the best chorus pedal i've ever made. :)Massatonyhttps://www.blogger.com/profile/16549784133280363899noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-41290638917242896762021-12-18T07:34:55.795-05:002021-12-18T07:34:55.795-05:00Got it working with these modifications too.
Als...Got it working with these modifications too. <br /><br />Also, I checked several mn3207 and bl3207 and I prefer how the bl sounds. <br /><br />I'm trying with trimmers for 7'5k and 100k for the next build as I find it has too much regeneration compared with my original.<br /><br /> M3 GuitarWorkshttps://www.blogger.com/profile/12898278738942432007noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-26260437789075140372021-10-21T20:09:57.947-04:002021-10-21T20:09:57.947-04:00Rahul is right remove the 47k res next 20k res.Rahul is right remove the 47k res next 20k res.Jun dhttps://www.blogger.com/profile/07905810487041216546noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-27651809194776971852021-10-21T20:07:40.046-04:002021-10-21T20:07:40.046-04:00Sir Massatony,connect the neg side to lug 1 and po...Sir Massatony,connect the neg side to lug 1 and pos side to lug3 of the trimmer.center lug on pin4 of ic mn3207.Jun dhttps://www.blogger.com/profile/07905810487041216546noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-38277426732756398222021-09-20T09:44:21.842-04:002021-09-20T09:44:21.842-04:00Verified its working
I did few things
1. Swapped...Verified its working<br /><br />I did few things<br /><br />1. Swapped 7.5k and 100k with each other( both are connected to pin 4 of mn3207.<br />2.removed 47k resistor which is situated in middle of 20k and mn3207. <br /><br />Thats itsZaraki1337https://www.blogger.com/profile/04815656896624384794noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-14464154593941440442021-09-20T00:22:49.015-04:002021-09-20T00:22:49.015-04:00I have the same questionI have the same questionZaraki1337https://www.blogger.com/profile/04815656896624384794noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-29976991584666907922021-09-19T13:53:34.258-04:002021-09-19T13:53:34.258-04:00Analog pedals
What resistor did u change with 7.5k...Analog pedals<br />What resistor did u change with 7.5k and 100k?<br /><br />What did u keep in place of them?Zaraki1337https://www.blogger.com/profile/04815656896624384794noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-73873149775291485402021-09-19T13:51:37.325-04:002021-09-19T13:51:37.325-04:00@rjflyinghokie change 7.5k and 100k to what? Can ...@rjflyinghokie change 7.5k and 100k to what? Can you make it clear?Zaraki1337https://www.blogger.com/profile/04815656896624384794noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-28756629204977223562021-09-19T13:49:34.686-04:002021-09-19T13:49:34.686-04:00Brother any updates on this. ? I just made today i...Brother any updates on this. ? I just made today its not workingZaraki1337https://www.blogger.com/profile/04815656896624384794noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-16626393452554431392021-09-13T12:32:39.228-04:002021-09-13T12:32:39.228-04:00@ryohei jpn Is that the only change u made from t...@ryohei jpn Is that the only change u made from this layout?Zaraki1337https://www.blogger.com/profile/04815656896624384794noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-1678205110831041902021-08-13T01:40:22.052-04:002021-08-13T01:40:22.052-04:00So if you remove the 7k5 and 100k resistores where...So if you remove the 7k5 and 100k resistores where does the trimmer go?Massatonyhttps://www.blogger.com/profile/16549784133280363899noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-37597072350755569182021-05-04T06:33:44.643-04:002021-05-04T06:33:44.643-04:00Sir , below is what i did on my mxr mic chorus i h...Sir , below is what i did on my mxr mic chorus i hope this can help. Jun fr Philippines.Jun dhttps://www.blogger.com/profile/07905810487041216546noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-67957665195500364512021-05-04T06:24:03.219-04:002021-05-04T06:24:03.219-04:00The above schem is verified with just a little adj...The above schem is verified with just a little adjustment..Jun dhttps://www.blogger.com/profile/07905810487041216546noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-50759115077026532092021-05-04T06:21:58.390-04:002021-05-04T06:21:58.390-04:00Mn 3207 bias voltage on pin 4 guys should be appro...Mn 3207 bias voltage on pin 4 guys should be approx 8.36v.remove the 7.5k and 100k resistor and replace it with a 100k trimmer and thats it!with the 220k trimmer the bias voltage on tlo62 should be around 4.7v or just turn the trimm until you get a nice sound output. Dont frget to replace that two 100k resistor connecting the trimm with 560k on the positive side and 270k on the neg side.<br />I hope this would help in any way to let the chorus roll. Regargs fr Philippines.Jun.Jun dhttps://www.blogger.com/profile/07905810487041216546noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-56140258615666437282021-05-03T21:58:54.429-04:002021-05-03T21:58:54.429-04:00Can u share the solutiom with photo, video or sche...Can u share the solutiom with photo, video or schematic ?ImpostorXXXhttps://www.blogger.com/profile/09242315595152782677noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-58287775538439600552021-05-03T21:23:55.976-04:002021-05-03T21:23:55.976-04:00Built this one last year and its awesome chorus! N...Built this one last year and its awesome chorus! Nice sounding and tnx for this layout anyways more power!Regards fr Philippines. Jun.Jun dhttps://www.blogger.com/profile/07905810487041216546noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-79059514975947780792021-04-19T17:33:35.845-04:002021-04-19T17:33:35.845-04:00You think the ticking sound is the pot's fault...You think the ticking sound is the pot's fault?Phillparkhttps://www.blogger.com/profile/13493981973342950874noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-23899085880077805692021-04-19T17:20:01.371-04:002021-04-19T17:20:01.371-04:00liar spotted.liar spotted.Phillparkhttps://www.blogger.com/profile/13493981973342950874noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-51137145500577502612021-04-19T17:05:30.003-04:002021-04-19T17:05:30.003-04:00Do someone know where I can find a working MXR Mic...Do someone know where I can find a working MXR Micro Chorus Schematics/PCB?Phillparkhttps://www.blogger.com/profile/13493981973342950874noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-63094681912573213152021-04-19T01:02:18.909-04:002021-04-19T01:02:18.909-04:00Someone tried this?Someone tried this?Phillparkhttps://www.blogger.com/profile/13493981973342950874noreply@blogger.com