tag:blogger.com,1999:blog-6847048658257278783.post431936549557031322..comments2024-03-29T01:36:12.851+00:00Comments on Guitar FX Layouts: Maxon OD820IvIarkhttp://www.blogger.com/profile/08416945174853142251noreply@blogger.comBlogger132125tag:blogger.com,1999:blog-6847048658257278783.post-43586874437446998962020-05-07T09:42:18.049+01:002020-05-07T09:42:18.049+01:00Do you have low volume problem? Or you want just m...Do you have low volume problem? Or you want just more boost?<br />I didn't built it, but I don't think this pedal has not enough volume, in this case you should search some mistake.<br />If you want to get more volume you have, indeed, encrease that stock 100k you mentioned. A 220k should be ok, I guess. Try a 330k. Higher value can give you more boost, but maybe could let go that opamp stage in overdrive.Elijah-Baleyhttps://www.blogger.com/profile/16374916649117645180noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-83588289015284235192020-05-06T11:58:20.788+01:002020-05-06T11:58:20.788+01:00Any advice to increase the volume a bit ??? I have...Any advice to increase the volume a bit ??? I have changed the resistance from 100K (right next to IC1) to 220k, I have seen that in some schemes they use 56k, the question is; Higher value or lower value to increase the volume a little more?josephttps://www.blogger.com/profile/08777691294010007726noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-6533881187421539862020-04-29T08:29:03.287+01:002020-04-29T08:29:03.287+01:00How do you get this primer made?
What method do y...How do you get this primer made? <br />What method do you use to print this? <br />I would love to know the processjosephttps://www.blogger.com/profile/08777691294010007726noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-68337991973741737612020-04-20T13:45:04.876+01:002020-04-20T13:45:04.876+01:00I think you need to put a larger cap between lugs ...I think you need to put a larger cap between lugs 3&6 to get the “fat” tone. BYOC uses a 330nf on that position of the switch, not 33nf. When run in parallel with the 47nf it haves a cap value of 377nf, which would let in more bass. mgnhttps://www.blogger.com/profile/04447753679989271874noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-32637004288137582532020-04-11T11:18:57.831+01:002020-04-11T11:18:57.831+01:00Hello, I have assembled the version of 4 pot. (cle...Hello, I have assembled the version of 4 pot. (clean + gain) separated. sounds great !!! but the "whistle" shhhhhhhhh in the background bothers me a lot,<br />I have already changed 4 integrated, (all of the same brand, true), but I can not eliminate that sharp noise.<br /> I have said that many of you have also happened, but I have not read anyone giving a solution.<br />Has anyone been able to eliminate that annoying noise?<br /><br />Thank youjosephttps://www.blogger.com/profile/08777691294010007726noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-63480733613965185332017-11-10T21:39:46.088+00:002017-11-10T21:39:46.088+00:00I builded two of them. And on first run I've g...I builded two of them. And on first run I've got massive whine on both units. I had ICL7660SCPA in both. Then I've ordered again the same chips (ICL7660SCPA) but in different shop. I replaced them and whine is gone. My two builds sounds exactly the same, great rich tone. Awesome overdrive!!! Thank you for schematic!Anonymoushttps://www.blogger.com/profile/12005948432392110784noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-75622262280246342192017-09-02T22:15:38.981+01:002017-09-02T22:15:38.981+01:00Hello again!
I have finished my first stripboard b...Hello again!<br />I have finished my first stripboard build now. The pedal sounds great!<br />Tone pot 25k worked great but I have another question: When I have the gain all off and volume and tone twelve o'clock the volume is lower when the pedal is on. If I have the volume att about 2 o'clock its about unity gain. Is this how its supposed to be?<br /><br />/Johan<br />Johanhttps://www.blogger.com/profile/09834020730371248534noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-54486973565575896972017-05-10T18:12:55.094+01:002017-05-10T18:12:55.094+01:00Hi!
What happens if i replace the 20k tone pot wit...Hi!<br />What happens if i replace the 20k tone pot with a 10k or a 25k? (The dealer dont have 20k pot)<br /><br />JohanJohanhttps://www.blogger.com/profile/09834020730371248534noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-19076115726134791672017-02-22T01:44:06.053+00:002017-02-22T01:44:06.053+00:00If anyone wanted to try the BYOC Green Pony "...If anyone wanted to try the BYOC Green Pony "Norm/Thin/Fat" mod, replace the 100nf in the center of the layout (below IC1) with an on-off-on switch with 47nf between lugs 1&4, 47nf between lugs 2&5 and 33nf between lugs 3&6. I ended up using 56nf/47nf/33nf. There wasn't a huge difference between the Normal and Fat positions, but the Thin position gives the familiar low end cut a la Tubescreamer.Convergent Soundhttps://www.blogger.com/profile/04776521049238856838noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-73608637291653691952016-08-15T16:00:18.321+01:002016-08-15T16:00:18.321+01:00replacing 7660 to max1044 without mods is ok?replacing 7660 to max1044 without mods is ok?Anonymoushttps://www.blogger.com/profile/16418277662947514570noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-34395916098694403192016-03-25T12:03:05.368+00:002016-03-25T12:03:05.368+00:00Here's a sample also: https://forums.rgc.ro/in...Here's a sample also: https://forums.rgc.ro/index.php?app=core&module=attach&section=attach&attach_id=259696HGE Contraptionshttps://www.blogger.com/profile/13124050879741157587noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-39928183859785537132016-03-21T07:49:12.226+00:002016-03-21T07:49:12.226+00:00Just finished mine yersterday, I think the owner w...Just finished mine yersterday, I think the owner will be pleased. Nice pedal! Did the 4 knob version, really tweakable that way. I wouldn't exactly call it a KLON killer, but it's very good, wooly ,plushy sounding. Btw, if some of you experience weird high end fizziness with the tone knob at max, or boosting an already ovedriven amp,almost into oscillations with this, try a number of 7660S-s from your batch,some don't exactly cut it, some are perfect. The pedal works perfectly.<br />Here are some pics, thanks again guys! You rock!<br /><br />http://hgecontraptions.blogspot.ro/2016/03/maxon-od820-clone-with-clean-and-gain.html<br />https://www.facebook.com/hgecontraptions/posts/696165800526239HGE Contraptionshttps://www.blogger.com/profile/13124050879741157587noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-24808446700264687942016-03-21T07:46:52.228+00:002016-03-21T07:46:52.228+00:00This comment has been removed by the author.HGE Contraptionshttps://www.blogger.com/profile/13124050879741157587noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-6868215094952385232015-10-04T11:17:07.237+01:002015-10-04T11:17:07.237+01:00thx😋thx😋Anonymoushttps://www.blogger.com/profile/07296541050048151082noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-66301709365102398672015-10-03T21:46:24.855+01:002015-10-03T21:46:24.855+01:00Yes, no problemYes, no problemIvIarkhttps://www.blogger.com/profile/08416945174853142251noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-51064763811270281172015-10-03T13:02:42.138+01:002015-10-03T13:02:42.138+01:00i can't get 20pf capacitors.
can i use 22pf on...i can't get 20pf capacitors.<br />can i use 22pf one instead of 20pf?<br /><br />Anonymoushttps://www.blogger.com/profile/07296541050048151082noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-62481885296137757562015-09-26T02:53:55.333+01:002015-09-26T02:53:55.333+01:00I'm having quite a bit of trouble getting the ...I'm having quite a bit of trouble getting the negative supply voltage to work correctly. I've built this part of the circuit twice now, and I can only seem to get -3volts. I've used different caps, checked all of my orientations over and over, knifed everything that I can, and checked both a MAX1044 and a 7760s. I'm generally a good trouble shooter, but I am rather stumped this time. Any tips from anyone?Anonymoushttps://www.blogger.com/profile/14602743819158885025noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-33734451684475983092015-09-13T14:26:23.405+01:002015-09-13T14:26:23.405+01:00Hey sorry to bring up an old project, but I've...Hey sorry to bring up an old project, but I've recently built this (the gain & clean version).<br /><br />I get a high-frequency whine/oscfillation at all settings... could it be that my voltage doubler is wrong?<br /><br />I'm using a TC7660SCPA, which apparently is meant to be ok for power... did I order the wrong IC?Craggleshttps://www.blogger.com/profile/01180732270518988441noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-13795722841741846752014-11-24T15:33:02.839+00:002014-11-24T15:33:02.839+00:00Sorry, any ideas on this?Sorry, any ideas on this?Willyhttps://www.blogger.com/profile/11648064857147436853noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-9870936400582967092014-11-24T15:32:39.995+00:002014-11-24T15:32:39.995+00:00Hmm, mine (clean and gain mod) sounds nothing like...Hmm, mine (clean and gain mod) sounds nothing like the video above. It's bassier and sounds more like a fuzz...<br /><br />I've substituted a 500kB for the clean, and a 5.6pf (well, that's what it has marked on it!) for the 10pf. I'm also using a 2n5457 with twisted leads. All these subs are because that's all I had around.<br /><br />The clean pot is working more like a gain, while the gain doesn't appear to do anything. The tone pot is acting as a volume, cutting it to nothing with less than a quarter CCW turn from max.Willyhttps://www.blogger.com/profile/11648064857147436853noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-17381829027582566022014-11-10T15:00:27.687+00:002014-11-10T15:00:27.687+00:00Ohhh! Sweet thnx!Ohhh! Sweet thnx!Blackwinghttps://www.blogger.com/profile/16864575046719143800noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-25693968618522441302014-11-10T07:57:26.598+00:002014-11-10T07:57:26.598+00:00Pump's not used as a voltage doubler, but it p...Pump's not used as a voltage doubler, but it produces a +9/-9V swing. So you'll just have both, +9V and -9V present, which looks like 18V through the eyes of the opamp. 16V caps can handle that just fine.<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-28655437361432869032014-11-10T03:40:08.228+00:002014-11-10T03:40:08.228+00:00Hey there just curious! If there is an 18 volt cha...Hey there just curious! If there is an 18 volt charge pump does that mean we need to up the cap volts? Is 16 volts going to cut it on the electrolytics? Thnx! Blackwinghttps://www.blogger.com/profile/16864575046719143800noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-51503991135830489822014-10-24T10:31:19.131+01:002014-10-24T10:31:19.131+01:00Hey guys, just finished the 4 knob version. Works ...Hey guys, just finished the 4 knob version. Works and sounds nice, thanks for the layout!<br />One thing is a bit weird though.. I have to crank the tone pot practically all the way up to get the treble similar to the bypased signal.. If I turn down the tone pot to say 3 o clock the sound gets quite dark.. Is this the way it should work?sumachttps://www.blogger.com/profile/05979097714421716150noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-6166624353254187292014-10-21T02:46:18.054+01:002014-10-21T02:46:18.054+01:00There's no 220u :o) If you mean the 470u then...There's no 220u :o) If you mean the 470u then it is sat between ground and -9V so even a 10V cap should be ok (but preferably 16V). And yes it's just a supply filter cap so 100u will probably be fine.IvIarkhttps://www.blogger.com/profile/08416945174853142251noreply@blogger.com