tag:blogger.com,1999:blog-6847048658257278783.post1173778950012850249..comments2024-03-29T01:36:12.851+00:00Comments on Guitar FX Layouts: JHS Twin Twelve V1IvIarkhttp://www.blogger.com/profile/08416945174853142251noreply@blogger.comBlogger53125tag:blogger.com,1999:blog-6847048658257278783.post-70447730683881793992022-08-22T21:23:46.395+01:002022-08-22T21:23:46.395+01:00If you want better bass response, change the 68K r...If you want better bass response, change the 68K resistor connected to the bass pot to 27K and the 100k resistor nearest to the 1n capacitor to 1K<br /><br />Ianhttps://www.blogger.com/profile/15254004060035345343noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-84756167134727704082022-08-15T19:13:33.484+01:002022-08-15T19:13:33.484+01:00This comment has been removed by the author.Ianhttps://www.blogger.com/profile/15254004060035345343noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-83508452873663346792022-02-07T15:29:41.291+00:002022-02-07T15:29:41.291+00:00Hello Zach,
Thank you so much for all your great ...Hello Zach,<br /><br />Thank you so much for all your great work, I really appreciate it, I’ve learned so much on your site. I just built this and initially I absentmindedly biased the J201s to 4.5V and the pedal was working. I then remembered that I needed to bias to 9v but when I did so I got no signal. It’s just dead quiet. I then looked at the charge pump and noticed it’s only outputting 9V. I tried an LT1054 and the result was the same. I’m fairly sure that the connections on my build match your layout, have you come across this before? Just to make sure I’m doing it right, where should I be measuring ~18V output from the IC?<br /><br />I tried consulting the IC’s datasheet to confirm the charge pump’s layout, however I’m not quite as proficient at that as I might have liked.<br /><br />Thanks again for your work,<br />Philip<br />Philip Ghttps://www.blogger.com/profile/10315804508439000253noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-40383003521078514002021-02-05T19:28:47.564+00:002021-02-05T19:28:47.564+00:00Mine is very noisy as well. Anyone found a solutio...Mine is very noisy as well. Anyone found a solution?JaySharphttps://www.blogger.com/profile/07384383820799333644noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-925872639246486552020-09-02T17:55:50.929+01:002020-09-02T17:55:50.929+01:00Hi,
Did you manage to avoid that noise ?
I have th...Hi,<br />Did you manage to avoid that noise ?<br />I have the same problem, checked everything, I’m out of idea..Cochoishttps://www.blogger.com/profile/06508688482896325016noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-74115527231778575042020-06-28T16:42:14.066+01:002020-06-28T16:42:14.066+01:00Im having a bit of trouble with this - My bass con...Im having a bit of trouble with this - My bass control is non responsive. According to this schematic, which is the BASS control? http://guitar-fx-layouts.42897.x6.nabble.com/file/n18170/destijl%2520revision%25202.jpg<br /><br />Any tips how to debug the bass control? Duncanhttps://www.blogger.com/profile/09466655911744304660noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-35969130023599969552019-05-16T18:51:04.285+01:002019-05-16T18:51:04.285+01:00you can calculate the values of the eq section eas...you can calculate the values of the eq section easily with this program, james passive bandaxall type http://www.duncanamps.com/tsc/<br />i suggest to lower the 22n to 2n etc.. it will have more effect on bass sidekg90https://www.blogger.com/profile/05845020734240478200noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-71527901703873985392018-12-10T15:59:25.358+00:002018-12-10T15:59:25.358+00:00hello, yes, it is in metal enclosure, i connected ...hello, yes, it is in metal enclosure, i connected all the grounds on one jack that touches the metal chasis( there is no ground wires fooling around a lot ) i increased the 47R resistor to 1k and rebiased the transistor, basicially disgarded one of the stages, still sounds really nice, also i didn't know that trimmers can add that much noise? Can you explain me further, maybe they act like an antenna? i should try that soon. thank youSimurghhttps://www.blogger.com/profile/08660039169033063088noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-70893031973911539832018-12-10T15:55:34.814+00:002018-12-10T15:55:34.814+00:00Is the circuit in a metal enclosure? Have you wire...Is the circuit in a metal enclosure? Have you wired the grounds correctly? I'd also recommend trying more jfets. After the bias is adjusted to your liking, remove every jfet trimmer, measure their resistance and use fixed resistors in their place.after all of this is done, if its still noisy it has to be a particularity of the circuit. Iagohttps://www.blogger.com/profile/13478141026000247956noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-85052769573916434032018-11-12T13:56:53.365+00:002018-11-12T13:56:53.365+00:00Hello folks, i have built this pedali sounds nice,...Hello folks, i have built this pedali sounds nice, used smd j201 fets, checked them , all in specs. I used multiple turn trimpots, shielded cables, branded caps etc. BUT, it's really noisy, i was suspicious about my guitar, so i pluuged a clean signal source, still the same, i excluded the charge pump too, still the same noise, i checked my pots, all okay, they are alpha pots, also im using 9v battery to eliminate wall adapter related noise. Tried to play around with bias voltage, same issues. Checked the soldering, bridges, faulty caps etc. I'm out of ideas any suggestions to make it less noisy? It produces noise even guitar volume is 0.Simurghhttps://www.blogger.com/profile/08660039169033063088noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-10322207505077393402018-10-11T20:38:40.877+01:002018-10-11T20:38:40.877+01:00Hi guys ! How does it sound on your sides ?Hi guys ! How does it sound on your sides ?Ffdream62https://www.blogger.com/profile/17903750298886023834noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-88768298658477077002018-05-01T03:13:27.854+01:002018-05-01T03:13:27.854+01:00I have the same issue. the bass is not as powerful...I have the same issue. the bass is not as powerfull as the videos, and the bass pot doesn't boost the bass that much...Anonymoushttps://www.blogger.com/profile/13057398351722100729noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-6740520602073637532018-03-24T20:00:09.730+00:002018-03-24T20:00:09.730+00:00....Jcowshttps://www.blogger.com/profile/17120533251982769051noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-3489470958616093652018-03-24T19:59:29.408+00:002018-03-24T19:59:29.408+00:00My guess is wrong value trimmer, bad jfets, or som...My guess is wrong value trimmer, bad jfets, or something is connected that shouldnt be. Try different jfets, then double check your cuts and links, then check your trimmer values.Jcowshttps://www.blogger.com/profile/17120533251982769051noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-83356567399374815812018-03-24T19:56:07.425+00:002018-03-24T19:56:07.425+00:00Thanks for your hard work on this great layout. I ...Thanks for your hard work on this great layout. I do have a small issue and it is concerning the bass knob, it has very little affect? I built two and both behave the same. Is there anything I could try to get more bass action?Jcowshttps://www.blogger.com/profile/17120533251982769051noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-31348094755933424882018-03-18T09:03:57.356+00:002018-03-18T09:03:57.356+00:00Hello. I can't rule any Voltage using the trim...Hello. I can't rule any Voltage using the trimmers. They just lower the voltage from let's say 17.5 to 17, it doesn't go lower than that. What could be wrong?<br />Thanks!<br />Anonymoushttps://www.blogger.com/profile/04632197073901135280noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-21922327143145117462018-03-15T23:45:48.856+00:002018-03-15T23:45:48.856+00:00Need some help. I built it but volume is low. All ...Need some help. I built it but volume is low. All the way up is just above unity and bass control is practicly useless. Anonymoushttps://www.blogger.com/profile/13057398351722100729noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-63002535233642275882018-01-26T16:16:00.605+00:002018-01-26T16:16:00.605+00:00I can get the first 3 trimmers to 9v, but the last...I can get the first 3 trimmers to 9v, but the last one will only go<br /> to a min of 10.5v Duncanhttps://www.blogger.com/profile/09466655911744304660noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-18496773340711371002018-01-25T12:58:14.761+00:002018-01-25T12:58:14.761+00:00@hans - did you build this with a ICL7660? I am us...@hans - did you build this with a ICL7660? I am using one and i think pin1 is NC? Duncanhttps://www.blogger.com/profile/09466655911744304660noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-52009731421070789242018-01-10T18:37:28.508+00:002018-01-10T18:37:28.508+00:00It's a Max1044 from Tayda. I was measuring at ...It's a Max1044 from Tayda. I was measuring at D1 before. I checked it at D2 and it's about 17.5V. Brad Grahamhttps://www.blogger.com/profile/09343693258695190677noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-19722330617007192232018-01-09T21:02:53.942+00:002018-01-09T21:02:53.942+00:00Thank you.
I'm still thinking about if I have ...Thank you.<br />I'm still thinking about if I have to build this pedal, of course I like it, especially if it really sounds as the original.<br /><br />Anyway, I should to get an ICL7660S. Your 15v seems a bit low. I assumed to get at least 17v.<br />Do you remember the IC you used? Did you check some possible mistakes?Elijah-Baleyhttps://www.blogger.com/profile/16374916649117645180noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-65812875282061870582018-01-08T19:09:26.053+00:002018-01-08T19:09:26.053+00:00The 20 x 20 worked for me. I tested it a few weeks...The 20 x 20 worked for me. I tested it a few weeks ago but haven't boxed it or played with it since. I think I was getting ~15V with the IC I used, so I biased to half that. Brad Grahamhttps://www.blogger.com/profile/09343693258695190677noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-16736259478296905952018-01-07T11:16:28.946+00:002018-01-07T11:16:28.946+00:00Did someone make work the updated layout 20x20?
I...Did someone make work the updated layout 20x20?<br /><br />I also found this one older pretty similar layout: http://guitar-fx-layouts.42897.x6.nabble.com/file/n18809/1485.png<br /><br />This is the the basic schematic: http://guitar-fx-layouts.42897.x6.nabble.com/file/n18170/destijl%2520revision%25202.jpg<br /><br />You can read the thread here: http://guitar-fx-layouts.42897.x6.nabble.com/Silvertone-1485-Twin-Twelve-td18170.htmlElijah-Baleyhttps://www.blogger.com/profile/16374916649117645180noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-89075560834451059142017-11-17T11:27:54.303+00:002017-11-17T11:27:54.303+00:00Hi, made this one using a TL1044s and biased all t...Hi, made this one using a TL1044s and biased all the J201's to as close to 9v as I could, sounds bad ass, loads of low end boarders on fuzz at higher gain settings. can consider this one verifiedAnonymoushttps://www.blogger.com/profile/06241145840350040657noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-22371817549484626812017-11-10T09:13:19.390+00:002017-11-10T09:13:19.390+00:00Hey Zach!
It could still be a 20x19 layout by elim...Hey Zach!<br />It could still be a 20x19 layout by eliminating row A if you want(not a major difference).<br />The 2nF - 12K connection on row E-17/18 can be lowered to G-17/18 (the 2nF would span 3 rows).<br />Add a cut on G-12.<br />D2 should go from row E-5 to B-5 (instead of A-5).<br />Now you can lower the 10uF cap, D1, IC1 (and their cuts) and the +9V connection 1 row down.<br />It could also become a 20x18 but you would have to move more components on the right side (again, it would not make much difference)Alexhttps://www.blogger.com/profile/02431893143306628176noreply@blogger.com