tag:blogger.com,1999:blog-6847048658257278783.post8000110757570499436..comments2024-03-29T01:36:12.851+00:00Comments on Guitar FX Layouts: Lotus Pedals THD+NIvIarkhttp://www.blogger.com/profile/08416945174853142251noreply@blogger.comBlogger52125tag:blogger.com,1999:blog-6847048658257278783.post-62492048125839046972022-06-01T12:56:31.256+01:002022-06-01T12:56:31.256+01:00Look at the notes under the layout - it tells you ...Look at the notes under the layout - it tells you there. tinkercreakhttps://www.blogger.com/profile/07453762648872549559noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-42898917226303585392022-05-31T13:30:28.628+01:002022-05-31T13:30:28.628+01:00This comment has been removed by the author.DavidBeaverscovershttps://www.blogger.com/profile/09489575337781166762noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-16592408160531647252022-05-31T13:24:02.987+01:002022-05-31T13:24:02.987+01:00I started building this pedal and I have an issue....I started building this pedal and I have an issue. I don't get where the PCB input and output are. I am supposed to wire them to the potentiometers and the switch right? I have made some research but I am lost. Sorry if the question seems dumb, I am a total beginner ^^. Thank youDavidBeaverscovershttps://www.blogger.com/profile/09489575337781166762noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-4516666893630797432015-03-22T14:24:44.905+00:002015-03-22T14:24:44.905+00:00Just finished building this. Getting a bit of hiss...Just finished building this. Getting a bit of hiss when drive pot turned up but other than that its not bad. Swapped Q1 round as mentioned in previous post and it does make it cleaner....weird. Mine is more like a very mild distortion than a fuzz. Might just double and triple check everything once more just to make sure my build is correct.Hozy31https://www.blogger.com/profile/16714771534041521767noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-17618149217498215772014-06-19T02:19:21.438+01:002014-06-19T02:19:21.438+01:00Have to agree that we're missing something wit...Have to agree that we're missing something withe the schematic. I've built this thing twice with different transistors, pots, and caps and still couldn't get a working pedal. Lots of RF withe drive turned CCW., but pretty good sound at full CW. Anyone else have an idea?Mr. Grrrhttps://www.blogger.com/profile/02474603989242211149noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-58477407267905591782014-06-10T14:46:21.224+01:002014-06-10T14:46:21.224+01:00Q1 collector resistor is the 22K to groundQ1 collector resistor is the 22K to groundIvIarkhttps://www.blogger.com/profile/08416945174853142251noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-30302364715974300112014-06-10T14:33:11.441+01:002014-06-10T14:33:11.441+01:00is the collector resister for Q1 the 22k going to ...is the collector resister for Q1 the 22k going to 9V+?just behind Q2?glasspak73https://www.blogger.com/profile/11792030395861982394noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-38746126171820577452014-03-12T22:26:55.191+00:002014-03-12T22:26:55.191+00:00Hi, I'm working pedal at a given scheme and I ...Hi, I'm working pedal at a given scheme and I think it's impossible to get the effect as videu.Radio frequencies are strong and I'm adding RF block capacitor of 150 pico circuit collector on Q1 and Q2.I am changed to input capacitor 22 nao to 47 nano and got stronger distortion. Noises which should be are still present.<br />Barcleyhttps://www.blogger.com/profile/12182864791546218793noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-19074460549552013152014-02-24T01:48:12.077+00:002014-02-24T01:48:12.077+00:00I've been playing with this one and I just hav...I've been playing with this one and I just haven't been satisfied with it. I tried it as-is in the schematic and it was really noisy, it picked up radio signals, and it just didn't give a good sounding distortion or fuzz for me. I switched Q1 as suggested by Johns, and it did get rid of the noise problem but I got almost no gain out of it, even when Drive was at maximum, and it sounded terribly thin. I switched both input and output caps and it just made it muddy. So I've scrapped this one altogether and am looking for another distortion. Thank anyway...vigilante397https://www.blogger.com/profile/02078840441979135706noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-82445861491316734002014-02-07T17:14:45.381+00:002014-02-07T17:14:45.381+00:00Cheers Simon, I think with all the responses now i...Cheers Simon, I think with all the responses now it's pretty safe to tag this verified.IvIarkhttps://www.blogger.com/profile/08416945174853142251noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-81715737532691250012014-02-07T13:29:19.552+00:002014-02-07T13:29:19.552+00:00Hmm, I think my comment got lost whilst previewing...Hmm, I think my comment got lost whilst previewing it. But the short was - built it tonight, sounds like the videos, I like it, just waiting for some 1590a's to arrive to box it up!SimonBhttps://www.blogger.com/profile/08660251434128037346noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-78202617449240586692014-02-06T14:00:25.877+00:002014-02-06T14:00:25.877+00:00Okay. I swapped out the transistors (same values)...Okay. I swapped out the transistors (same values) and it is more fuzz like. Much closer to the video sound. You get bloom with bends like a fuzz with the Drive on 11 (and it gets a little noisy, but not a troubling amount) So it's fuzz-ish for me but it might be a question of where that fuzz / distortion line is for me. At lower Drives, it's a nice sounding distortion, as I stated in an earlier post. Piltdown Manhttps://www.blogger.com/profile/13069386624600054452noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-32206205844014172832014-01-27T00:30:29.129+00:002014-01-27T00:30:29.129+00:00Yea, it's the same layout as above. I just loo...Yea, it's the same layout as above. I just looked at the schematic and you're right that it should be CBE. I just checked the board and its right too, no mistakes. Why could reversing Q1 make it sound correct, as opposed to the issues I had before? The biggest being a tone change when turning the gain pot.Zachhttps://www.blogger.com/profile/00044917566185720896noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-87660866746534747842014-01-26T05:36:17.120+00:002014-01-26T05:36:17.120+00:00This comment has been removed by the author.Zachhttps://www.blogger.com/profile/00044917566185720896noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-14317369022238388922014-01-25T22:51:13.650+00:002014-01-25T22:51:13.650+00:00Not according to the trace or the Jerkulator schem...Not according to the trace or the Jerkulator schematic. Both emitters are definitely connected with a cap to ground. Q1 collector has a resistor to ground, Q2 resistor has a resistor to 9V, same as the Jerkulator. You do have the latest version of the layout don't you with Q1 collector resistor to ground?IvIarkhttps://www.blogger.com/profile/08416945174853142251noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-86073622425370236142014-01-25T21:44:45.416+00:002014-01-25T21:44:45.416+00:00Ok. Been messing with this one today and I think I...Ok. Been messing with this one today and I think I figured out some of the problems with mine, and possibly the layout. <br /><br />First, if I put Q1 in and CBE just like the layout above, I get some hiss in the background, gets nice and fuzzy with gain at full CW, and the tone changes when the gain is turned CW from full CCW. I changed the orientation of Q1 to EBC, top to bottom, the pedal completely changes, IE: no background hissing at all, it does not get fuzzy, and no tone change when the gain is turned CW from full CCW. In fact, it sounds pretty much dead on to the video above, just bassier since I altered the input and output caps.<br /><br />I didn't see the schematic, but should Q1 be reversed?<br /><br />Second, I know it's listed as a fuzz, but the more I listen to it in the video and mine, it does seem more like an overdrive/distortion, up until about 3-4 clock.<br /><br />Pilt and Chee, reverse Q1 and see if that makes it sound right.<br /><br />Also, side note, I assume this can be daisy changed even thought Q1 is a PNP transistor. Am I correct?Zachhttps://www.blogger.com/profile/00044917566185720896noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-65171179962420893392014-01-25T04:20:04.784+00:002014-01-25T04:20:04.784+00:00It's an old Fender Blues Jr 15 watt 2 EL84'...It's an old Fender Blues Jr 15 watt 2 EL84's. I was using a SGPiltdown Manhttps://www.blogger.com/profile/13069386624600054452noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-67285923348758044532014-01-24T22:29:33.665+00:002014-01-24T22:29:33.665+00:00hm… what kind of amp did you use? because when i f...hm… what kind of amp did you use? because when i first tired it with my small combo amp (Marshall MG15)… it was not that noisy, and some how it did quite more distortion sound….<br /><br />but i just didn't why it sounded differently with my three valve amps…. Anonymoushttps://www.blogger.com/profile/17534663475721915373noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-55096585240358034572014-01-24T17:55:33.287+00:002014-01-24T17:55:33.287+00:00Maybe it has to do with the transistors. I could s...Maybe it has to do with the transistors. I could see the hfe, and quality of the transistors making a difference. Maybe the higher the hfe the more distortion/fuzzy it gets. In my russian muff the hfe made a huge difference in fuzziness, output, and character of the fuzz. Zachhttps://www.blogger.com/profile/00044917566185720896noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-42917937902808409742014-01-24T14:42:08.727+00:002014-01-24T14:42:08.727+00:00That's what I figured. I didn't think that...That's what I figured. I didn't think that was weird, what I do is the change in tone when gain is at "0" to anything "1" and above it gets trebly. I think it has to do with the change I made to the input cap, but not the output. Zachhttps://www.blogger.com/profile/00044917566185720896noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-24920070478131645572014-01-24T13:28:53.568+00:002014-01-24T13:28:53.568+00:00What a weird bunch of differences from one pedal b...What a weird bunch of differences from one pedal built by different people. Mine is a distortion but it is DEAD quiet with the One Spot. Eerily so. Maybe I'll swap out the transistors because I can't think of anything else that would change the sound anyPiltdown Manhttps://www.blogger.com/profile/13069386624600054452noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-87353210121727490562014-01-24T08:10:06.681+00:002014-01-24T08:10:06.681+00:00"One Mine if the gain is full CCW I have the ..."One Mine if the gain is full CCW I have the volume up full CW" that makes sense, they are both essentially the same thing, the Gain pot dumps signal to ground at the input, the Volume pot dumps signal to ground at the output. So when the gain control is fully CCW the only thing stopping the entire signal from being dumped to ground and the pedal being silent is the 1K resistor at Gain 1. So it makes sense that you would have to compensate at the volume pot. <br /><br />So everyone's build should behave in that way or there is a build problem of some sort.IvIarkhttps://www.blogger.com/profile/08416945174853142251noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-36643842431764358622014-01-24T01:59:36.137+00:002014-01-24T01:59:36.137+00:00Hmmm, not sure. One Mine if the gain is full CCW I...Hmmm, not sure. One Mine if the gain is full CCW I have the volume up full CW. Once I start playing with the gain I back the volume off to about 9-12 o'clock and it's a good volume boost besides the fuzz.<br /><br />Try it and see if that works on yours. Once I change the output cap, I'll come back with a report on how much the low end improves.Zachhttps://www.blogger.com/profile/00044917566185720896noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-49513131812708634292014-01-24T01:04:46.046+00:002014-01-24T01:04:46.046+00:00Good on you Johns~! i couldn't rise the vol kn...Good on you Johns~! i couldn't rise the vol knobs because of the crazy feed back and noise, maybe thats why it was not that fuzzy… <br />Anonymoushttps://www.blogger.com/profile/17534663475721915373noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-28811760536775073012014-01-23T22:35:21.361+00:002014-01-23T22:35:21.361+00:00Hmmm. Mine definitely is fuzzy and nearly identica...Hmmm. Mine definitely is fuzzy and nearly identical like it is in the original in the above video. Mine just has a tone change when you turn the gain from full CCW at "0" to anything above. Still trying to figure it out. <br /><br />Chee, mine is very loud too, and noisey like yours with the onespot, which I think is the reason for the extra noise. At lower volumes mine is more drive then fuzz, but when you turn it up past 12 o'clock it starts to get nice and fuzzy. <br /><br />Definitely a keeper for me even with the oddness mine is showing. Nice and creamy, overdrive to fuzzy goodness. Zachhttps://www.blogger.com/profile/00044917566185720896noreply@blogger.com