tag:blogger.com,1999:blog-6847048658257278783.post4632267127814834382..comments2024-03-28T18:53:30.726+00:00Comments on Guitar FX Layouts: Dr. QuackIvIarkhttp://www.blogger.com/profile/08416945174853142251noreply@blogger.comBlogger30125tag:blogger.com,1999:blog-6847048658257278783.post-29604005332647173812024-02-16T06:32:53.749+00:002024-02-16T06:32:53.749+00:00Where is the page or link for the schematics diagr...Where is the page or link for the schematics diagram Dr Quack and Nurse Quack please?Indra Lesmanahttps://www.blogger.com/profile/14419072431428201508noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-74370928111882537132020-09-19T02:43:15.683+01:002020-09-19T02:43:15.683+01:00Sensitivity has a small sweet spot...very smallSensitivity has a small sweet spot...very smallTedShttps://www.blogger.com/profile/02568218407570938413noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-28998571350430143832020-03-31T23:14:44.646+01:002020-03-31T23:14:44.646+01:00I’ve tried finding the “sweet spot” on the trim po...I’ve tried finding the “sweet spot” on the trim pot but it doesn’t seem to have any effect either. I’m stumpedWilsonhttps://www.blogger.com/profile/11043715187624218152noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-66799645504747846482020-03-31T23:14:12.039+01:002020-03-31T23:14:12.039+01:00
I’m having similar issues as some above; I’m gett...<br />I’m having similar issues as some above; I’m getting no effect response to picking or strumming. The LEDs will light up and one will respond to picking but essentially it sounds exactly the same as when in bypass aside from some added hum and buzz. Any idea how I can fix this?Wilsonhttps://www.blogger.com/profile/11043715187624218152noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-31364227734370965932020-03-31T23:13:03.065+01:002020-03-31T23:13:03.065+01:00This comment has been removed by the author.Wilsonhttps://www.blogger.com/profile/11043715187624218152noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-81587669514624009002018-12-19T22:38:15.432+00:002018-12-19T22:38:15.432+00:00hai..saya telah membuatnya dan berhasil dengan san...hai..saya telah membuatnya dan berhasil dengan sangat baik dengan J201 sebagai jfet nya.tl072.dan led 5 mm biru terang..tetapi saya mendapatkan sinyal output yang kecil....apakah dapat membantu..?<br />terima kasih untuk layout yang hebat ini..mamah chyntiahttps://www.blogger.com/profile/09152025157775698572noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-69116392738865463482015-08-05T19:24:31.686+01:002015-08-05T19:24:31.686+01:00Yes. Anything up to 22 wide will fit a 1590BYes. Anything up to 22 wide will fit a 1590BCiaran Hasletthttps://www.blogger.com/profile/14841971807120256954noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-46473047420811593022015-08-05T17:05:29.729+01:002015-08-05T17:05:29.729+01:00will this fit in a 1590B?will this fit in a 1590B?Anonymoushttps://www.blogger.com/profile/00502868356585258574noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-12443694233664374432015-04-14T15:34:57.408+01:002015-04-14T15:34:57.408+01:00This is a great build, sounds fantastic. Used 2N54...This is a great build, sounds fantastic. Used 2N5457, 2N3904, 3mm red LEDs and TL072. Put it before my Mutron III clone and with both going you get some wacky sounds. Going to have alot of fun with this one. Hozy31https://www.blogger.com/profile/16714771534041521767noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-31483130686610065722014-12-07T09:30:16.550+00:002014-12-07T09:30:16.550+00:00thank you Savvas!
now i know what it means to be b...thank you Savvas!<br />now i know what it means to be build a sensitive circuit.<br />it has a fairly small sweet spot and the leds must be matched.<br />regards,<br />georgeυποδούρειος λίπποςhttps://www.blogger.com/profile/08483126055355957856noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-47855317846914792022014-12-05T20:10:20.038+00:002014-12-05T20:10:20.038+00:00Oops sorry I didn't reference the layout very ...Oops sorry I didn't reference the layout very carefully obviously. Just found it odd that there's 0v on the collector really Travishttps://www.blogger.com/profile/00836791717229314419noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-59890191914357525092014-12-05T19:27:34.091+00:002014-12-05T19:27:34.091+00:00emitter is fine cause it's connected to ground...emitter is fine cause it's connected to ground. but for collector you could be right Travis..even if sw4 and sw5 are connected, there is still a 47k so 0 voltage is weird.<br />but maybe i'm totally off on that one..i can't say for sure...ξεναγός νεκρόποληςhttps://www.blogger.com/profile/13463939372683232133noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-28091236787376012972014-12-05T18:29:59.419+00:002014-12-05T18:29:59.419+00:00It does seem weird that Q2 has 0v on collector and...It does seem weird that Q2 has 0v on collector and emitter. Does that change with the envelope?Travishttps://www.blogger.com/profile/00836791717229314419noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-6563464944904002952014-12-05T17:36:11.171+00:002014-12-05T17:36:11.171+00:00well done george! i'm glad you made it!
i was...well done george! i'm glad you made it! <br />i was about to open mine and take voltages.<br />to the next one!ξεναγός νεκρόποληςhttps://www.blogger.com/profile/13463939372683232133noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-42148119784591418382014-12-04T23:20:24.785+00:002014-12-04T23:20:24.785+00:00woo hoo!
Savvas, i got it working!
i indeed measur...woo hoo!<br />Savvas, i got it working!<br />i indeed measured the voltages, and although i am a new to diy, they didn't seem strange to my eyes,so, i tried different Leds for the D2 position.<br />my build likes best 5mm blue led for D1 and 3mm red or 5mm yellow.<br />blue/yellow led combo sounds better and it's more visually appealing.<br />i have also switched the IC from TL072 to JR5458, and added an extra 10K (in parallel) to the 10K between the 9v and ic1A, following this suggestion (last comment) http://www.muzique.com/news/dr-quack-envelope-filter-mods/ <br /><br />my voltages (pots at max. position) are : <br />Q1 (2n5458)<br />D: 8,76 (same as my battery)<br />S: 5,86<br />G: 2,92<br /><br />Q2 (2n3904)<br />E: 0,00<br />B: 0,22<br />C: 0,00<br /><br />IC (TL072)<br />1: 3,20<br />2: 1,84<br />3: 3,20<br />4: 0,00<br />5: 8,59<br />6: 4,38<br />7: 4,37<br />8: 4,27<br /><br />D1 (5mm blue Led)<br />(+): 3.20<br />(-): 0.00<br /><br />D2 (5mm problematic-blue Led)<br />(+): 3.20<br />(-): 0.61 <br /><br />D2 (5mm working-Yellow Led)<br />(+): 2.80<br />(-): 1.33<br /><br />ps: the resistors in series are 2.2M +1M. i followed this mod: "The 3.3M gain resistor, raised from 2.2M in the original, results in a stronger envelope signal. (Mark Hammer)" http://home-wrecker.com/nurse-quacky.html<br />υποδούρειος λίπποςhttps://www.blogger.com/profile/08483126055355957856noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-53165471204477992482014-12-04T18:29:37.306+00:002014-12-04T18:29:37.306+00:00hi George!
do you mean 2x1M resistors in series ca...hi George!<br />do you mean 2x1M resistors in series cause you didn't have a 2.2M?cause i can't see the reason why you made it 3.2M.<br />anyway. i think that there is no problem with this layout. <br /><br />thought i've only build the e-h doctorQ, i can't guess why AMZ replaced the trimmer with a pot, cause i remember that there was only one spot of it's sweep that provides the effect.did you found any spot on that range pot that gives you a better effect? if not i guess that there is a problem with your build man. you could post some voltages and photos.ξεναγός νεκρόποληςhttps://www.blogger.com/profile/13463939372683232133noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-26476316962489643722014-12-04T10:37:22.442+00:002014-12-04T10:37:22.442+00:00hi,
i am having similar problems, as the ones stat...hi,<br />i am having similar problems, as the ones stated above.<br />i can;t get the D2 to respond to my picking unless i pick real hard.<br />basic components are: Q1 2N5457, Q2 2N3904, IC TL072.<br />i have placed a 1M resistor in series to the 2.2M, and replaced the 3mm D2 Led with a 5mm yellow one.<br />it's a bit more responsive, but the output is almost identical as my clean tone.<br />i have noticed that if i touch the 2.2M resistor with a screwdriver, the D2 Led is working as it should, but with a lot of noise.<br />can someone please explain what is going on? or<br />can someone provide working voltages?<br />thanks,<br />georgeυποδούρειος λίπποςhttps://www.blogger.com/profile/08483126055355957856noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-78548236352993021712014-11-04T10:46:51.952+00:002014-11-04T10:46:51.952+00:00Another build is verified! I just wanted to let yo...Another build is verified! I just wanted to let you know that it works great with a 5mm LED (I used a green one instead of the 3mm red D2). I also attached a standard red 5mm LED to the foot switch (True Bypass). And I added a SPDT to be able to switch between the 2.2M resistor after D2 and another resistor. But I'm still trying to figure out the best value of the second resistor. Regarding the IC I'm still thinking wether to go with the 4558 or the 5532. Both sound really nice. And I subbed the 5nF with 4n7 and the 50nF with 47nF.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-3561420194121651482014-10-28T14:01:10.804+00:002014-10-28T14:01:10.804+00:00I will do, thanks. But I still have to order the p...I will do, thanks. But I still have to order the parts.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-23297499688073561092014-10-28T08:45:05.482+00:002014-10-28T08:45:05.482+00:00The easiest way is to socket the LEDs and try them...The easiest way is to socket the LEDs and try them. It shouldn't make a differencedbat69https://www.blogger.com/profile/11868011846474702140noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-41120935189541676322014-10-27T17:16:50.538+00:002014-10-27T17:16:50.538+00:00Hi, can I change the size of D1 and D2 from 3mm to...Hi, can I change the size of D1 and D2 from 3mm to 5mm without adjusting other parameters? Do the changes affect the sound? I'd like to change the LED size, because all my other pedals are equipped with 5mm LEDs, too.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-13734020099567214072013-09-10T18:39:49.234+01:002013-09-10T18:39:49.234+01:00Whoooooooo!!! Try ic Opa2604 for mi it's the b...Whoooooooo!!! Try ic Opa2604 for mi it's the best choice, great tone and filter more open, the pots turns very interactive, i think. <br />Great board!!!! Thanks!!! Anonymoushttps://www.blogger.com/profile/13059990045753740438noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-16634210063621365332013-07-19T00:33:52.163+01:002013-07-19T00:33:52.163+01:00This is verified? The sensitivity seems to be a ra...This is verified? The sensitivity seems to be a rate, since it speeds up the oscillation, and the range seems to be a sensitivity, since it changes the effects sensitivity to attack. Also, both pots do next to nothing before fifty percent. Maybe use reverse logarhythmic or such? The LED between the resistors does nothing, just stays on, so I think I will use a 3pdt to switch it off at the cathode. Also, rc4558 has kind of a dirty wah, and tl072 makes it cleaner. Btw, my only deviation is that I used a 1n4148.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-17605706439722399482013-02-14T07:59:05.408+00:002013-02-14T07:59:05.408+00:00I think I used a 20k (possibly 22k) on the Nurse Q...I think I used a 20k (possibly 22k) on the Nurse Quacky so seeing as they're similar circuits I'm sure it'll be fine.Madferrethttps://www.blogger.com/profile/09175525273138876001noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-2589299964892400202013-02-14T02:58:54.652+00:002013-02-14T02:58:54.652+00:00Can i use a 20k pot instead of 25k pot?Can i use a 20k pot instead of 25k pot?Luis Bandahttps://www.blogger.com/profile/01867814281501542169noreply@blogger.com