tag:blogger.com,1999:blog-5481402030233340127.post4723134347947487848..comments2024-03-28T17:24:07.520-04:00Comments on Perf and PCB Effects Layouts: ESR Graphic Fuzzdtgehringhttp://www.blogger.com/profile/09555201436004501222noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-5481402030233340127.post-25784233924540817142021-04-10T21:30:33.532-04:002021-04-10T21:30:33.532-04:00I built it a couple of days ago and it sound amazi...I built it a couple of days ago and it sound amazing!!lienlaf96https://www.blogger.com/profile/06589852474296464091noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-77251249063812732512015-09-28T21:56:52.038-04:002015-09-28T21:56:52.038-04:00I built the amz simple jfet buffer and it makes it...I built the amz simple jfet buffer and it makes it stable, but I had to change the filter pot to 10k to make it usable, because 99% of the rotation was almost useless. I don't know if it's my build or what, but now it sounds amazing, really. Thanks!el_felahttps://www.blogger.com/profile/06993444585226121031noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-6973492505718894562015-09-25T09:47:59.853-04:002015-09-25T09:47:59.853-04:00This thing is really sensitive to input impedance,...This thing is really sensitive to input impedance, so you may want to add a buffer to it (the AMZ simple JFET buffer would work well). EBRAddict over on FSB recommends having the buffer feed pin 2 of the IC.<br /><br />http://freestompboxes.org/viewtopic.php?p=250813#p250813dtgehringhttps://www.blogger.com/profile/09555201436004501222noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-42767047125330618282015-09-24T20:52:19.415-04:002015-09-24T20:52:19.415-04:00Built it. Squealing is too loud most of the time, ...Built it. Squealing is too loud most of the time, how could I keep it down?I used polyester caps rated 400v, and it sounds pretty close to the original on the video. Thanks for posting this!el_felahttps://www.blogger.com/profile/06993444585226121031noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-23207131141054661792015-05-04T18:58:08.295-04:002015-05-04T18:58:08.295-04:00PCB layout verified as well. At first I got nothin...PCB layout verified as well. At first I got nothing but squealing/oscillation. I went back to the bench twice to check everything out. Then I hooked it up again and noticed the bass roll-off knob was set on my guitar. I backed it all the way off and it sounds much closer to the vide.david-househttps://www.blogger.com/profile/10819408763126784775noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-65621146718791893172015-01-29T09:08:53.913-05:002015-01-29T09:08:53.913-05:00Awesome! Thanks for the verify. Awesome! Thanks for the verify. dtgehringhttps://www.blogger.com/profile/09555201436004501222noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-69942324895478540802015-01-29T02:49:11.458-05:002015-01-29T02:49:11.458-05:00Thanks for the update. I etched and built it tonig...Thanks for the update. I etched and built it tonight and it worked and sounded like the demo. I did notice that this thing howls when the volume is down the then the filter will adjust the tone of the howl. If I get the volume up past 20% the howling will stop unless you turn the filter all the way up like in the video. I know Tabbycat is still tweaking this layout a bit in FSB so I will watch that thread also. This thing really does sound great though. Can't wait to get to crank it up.<br /><br />CodyAnonymoushttps://www.blogger.com/profile/07242093590730084214noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-20578201008556326362015-01-28T09:49:45.907-05:002015-01-28T09:49:45.907-05:00I noticed last night that the 2 10k resistors at t...I noticed last night that the 2 10k resistors at the bottom of the layout need to be connected to pin 3. Just updated the layout so now it should be correct to the schematic posted above. Not sure if that would contribute to you just getting clean output, but give it a try. I'm not great at troubleshooting, but you might want to socket the 1µf output cap and see if that could be cleaning up the signal between it and pin 6 (tho I kinda doubt that's the culprit).dtgehringhttps://www.blogger.com/profile/09555201436004501222noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-12055041945534770022015-01-28T00:17:39.102-05:002015-01-28T00:17:39.102-05:00I built this tonight and seemed to run in to an is...I built this tonight and seemed to run in to an issue. Here are my voltages first<br /><br />LM741CN<br />1 0v<br />2 2.1v<br />3 1.7v<br />4 0v<br />5 0v<br />6 2.1v<br />7 9.5v<br />8 0<br /><br />I am getting clean signal on pin 2 and I am getting distorted signal on pin 6 but the volume seems to be only outputting clean signal. I have checked my pot pin out 3 times now and everything looks good. Suggestions?<br /><br />CodyAnonymoushttps://www.blogger.com/profile/07242093590730084214noreply@blogger.com