tag:blogger.com,1999:blog-5481402030233340127.post2514296594985395178..comments2024-03-28T17:24:07.520-04:00Comments on Perf and PCB Effects Layouts: EWS Tri-Logic Bass Preamp IIdtgehringhttp://www.blogger.com/profile/09555201436004501222noreply@blogger.comBlogger28125tag:blogger.com,1999:blog-5481402030233340127.post-54344083705656014662021-04-19T09:37:31.436-04:002021-04-19T09:37:31.436-04:00First off, thanks for the fantastic web-site and a...First off, thanks for the fantastic web-site and all the efforts you put into this project! This is my go-to place either to buy pcb's or just have fun with perfboards.<br /><br />Tri-Logic is great and it worked right away. What impresses me the most is mid controls. Great addition to the Stingray's existng EQ.<br /><br />Still I need pro's tip and sorry if it is a dumb question and I miss obvious thing.<br /><br />I have a hum around G frequency that becomes even more noticeable as I dial up the Gain or Mid knobs, though visually everything on the board is identical to the layout.<br />The power unit I use for my builds seems to be OK, or at least it makes no noise when I plug it into other pedals. I managed to reduce the hum a bit by putting 220uF el cap on the power input of the board, but it is still present and produces unwanted harmonics.<br /><br />Do you have any ideas how to troubleshoot/fix such a hum, like is it a ground issue, value mismatch, poor component quality, power source, etc?<br /><br />Many thanks again!<br />Anatoliihttps://www.blogger.com/profile/07139959597148703233noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-89600687518617451902021-02-19T17:58:09.405-05:002021-02-19T17:58:09.405-05:00it works!!! the active and passive switch works wi...it works!!! the active and passive switch works with an active music man, had no capacitors without specified polarity and used electrolytic with the negative facing the right side of the layout. thanks for the great job, i've been a huge fan of this blog for years !!!Ricco Seixashttps://www.blogger.com/profile/16351031394073802665noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-25737243055732310932020-10-11T10:53:23.764-04:002020-10-11T10:53:23.764-04:00This comment has been removed by the author.mApUhttps://www.blogger.com/profile/08302060213181553054noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-53993551331920732302020-01-25T07:19:11.482-05:002020-01-25T07:19:11.482-05:0018V.. 😫 thot i could series it with other 9V peda...18V.. 😫 thot i could series it with other 9V pedals. bigbizkithttps://www.blogger.com/profile/17824611748942085019noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-78331921850584423562019-10-23T14:09:01.705-04:002019-10-23T14:09:01.705-04:00can i replace it with 2n5458? thankscan i replace it with 2n5458? thanksAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-5961118665784265542019-09-05T12:11:15.736-04:002019-09-05T12:11:15.736-04:00I have passive bass, so don't hear any differe...I have passive bass, so don't hear any difference at a/p switch🙄may be You nows any ways how to check this function? Basiliushttps://www.blogger.com/profile/06801664299911873673noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-20996420882988541292019-09-05T10:53:51.781-04:002019-09-05T10:53:51.781-04:00Cool. Did the active/passive switch work ok?Cool. Did the active/passive switch work ok?Effects Layoutshttps://www.blogger.com/profile/11341183658959824998noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-74685832426720978972019-09-05T10:00:01.135-04:002019-09-05T10:00:01.135-04:00Very usefull stuff, good boosting bass and treble....Very usefull stuff, good boosting bass and treble.But I had add a germanium diode at gain stage for little compression and to some colour preamp tone. Thanks for pcb, works great<br />Basiliushttps://www.blogger.com/profile/06801664299911873673noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-58379451155954078372019-09-03T23:58:22.060-04:002019-09-03T23:58:22.060-04:00hi, I can't find small nonpolar 2.2 uf and 10 ...hi, I can't find small nonpolar 2.2 uf and 10 uf in local store here, can I replace it with electrolyt caps?<br />because nonpolar available here, is only the big one, like in passive crossover.<br /><br />I think it to big for this kind of pedal?<br /><br />thanksadminhttps://www.blogger.com/profile/01281447914448721575noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-39856018758122511582019-07-02T17:04:24.245-04:002019-07-02T17:04:24.245-04:00Yes, I got your point, but the electrical effect s...Yes, I got your point, but the electrical effect still the same, can you figure it?<br />In time, I tried by routing myself the board and got a quasi non effectiv mid knob... I'm gonna re-buil itPedro_Marizhttps://www.blogger.com/profile/00690779330980806281noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-13028435724387007252019-04-16T03:14:10.912-04:002019-04-16T03:14:10.912-04:00
extremely grateful<br />extremely gratefulBazin Guitarshttps://www.blogger.com/profile/01629895788672730068noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-52851828824559443372019-04-15T09:03:33.120-04:002019-04-15T09:03:33.120-04:00BS170 (or 2N7000 would probably also work)BS170 (or 2N7000 would probably also work)Effects Layoutshttps://www.blogger.com/profile/11341183658959824998noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-30192588709719699532019-04-15T04:29:37.928-04:002019-04-15T04:29:37.928-04:00Hey. What kind of MOSFET is applied here? J201? 2n...Hey. What kind of MOSFET is applied here? J201? 2n5457? Bazin Guitarshttps://www.blogger.com/profile/01629895788672730068noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-15032909141412217762019-02-23T12:30:02.794-05:002019-02-23T12:30:02.794-05:00No, you need to use non-polarized caps. They don&#...No, you need to use non-polarized caps. They don't necessarily have to be electrolytic. Effects Layoutshttps://www.blogger.com/profile/11341183658959824998noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-78420310273455692022019-02-23T04:02:09.188-05:002019-02-23T04:02:09.188-05:00well, that means those electrolyte polarity is not...well, that means those electrolyte polarity is not important??Anonymoushttps://www.blogger.com/profile/01122084964765392703noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-1268448991170311172019-02-18T21:13:24.700-05:002019-02-18T21:13:24.700-05:00At least according to the schematic, yes. At least according to the schematic, yes. Effects Layoutshttps://www.blogger.com/profile/11341183658959824998noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-35135393654090214132019-02-18T18:57:31.577-05:002019-02-18T18:57:31.577-05:00why some electrolytes don't have polarity? wha...why some electrolytes don't have polarity? whats the correct way?Anonymoushttps://www.blogger.com/profile/01122084964765392703noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-79883704627287241302019-02-15T23:04:34.632-05:002019-02-15T23:04:34.632-05:00Thanks for verifying and for the kind words!Thanks for verifying and for the kind words!Effects Layoutshttps://www.blogger.com/profile/11341183658959824998noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-81235309750223559312019-02-15T21:53:36.803-05:002019-02-15T21:53:36.803-05:00Good Day! It is verified. For volume I used A100k....Good Day! It is verified. For volume I used A100k. <br />It works as well as the product version of Trilogic3 I have. While it is a quite versatile EQ, it does not color your tone like Bartolini, Eden and others.<br /><br />Always I thank you for all the great works here. This blog makes my DIY life so vivid!shimanekohttps://www.blogger.com/profile/05899947207748999007noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-81553137167919005052019-02-11T21:25:39.759-05:002019-02-11T21:25:39.759-05:00I just waiting for Omni Cabsim from "noise ma...I just waiting for Omni Cabsim from "noise maker" layout....<br /><br />Hehehehe... god job, this my favorite blog.Anjanghttps://www.blogger.com/profile/17913492931758415248noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-46394881794771106222019-02-11T19:34:29.700-05:002019-02-11T19:34:29.700-05:00I just Follow the schematic, in schematic active/p...I just Follow the schematic, in schematic active/passive 100K is not to groundAnjanghttps://www.blogger.com/profile/17913492931758415248noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-15606687882029074402019-02-11T19:13:36.661-05:002019-02-11T19:13:36.661-05:00This comment has been removed by the author.Anjanghttps://www.blogger.com/profile/17913492931758415248noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-60107720220684625732019-02-11T18:47:51.757-05:002019-02-11T18:47:51.757-05:00I'm gonna try the layout this week and fedback...I'm gonna try the layout this week and fedback here.Pedro_Marizhttps://www.blogger.com/profile/00690779330980806281noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-25914086390768894822019-02-11T18:46:42.624-05:002019-02-11T18:46:42.624-05:00I think the concept of the 100k to ground is to dr...I think the concept of the 100k to ground is to drop que Zin (input impedance), instead of attenuating the signal adding more resistance to the path, a compromisse with noise etc...Pedro_Marizhttps://www.blogger.com/profile/00690779330980806281noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-2122466929526747482019-02-10T21:06:51.216-05:002019-02-10T21:06:51.216-05:00not build yet... just check the schematic, looks l...not build yet... just check the schematic, looks like everything is fine... only the active/passive is wrong concept, when switch to active its must be drop the signal with 100K.. not 100K to ground..<br /><br />but you doing god layout.. <br />wow.. thanks Anjanghttps://www.blogger.com/profile/17913492931758415248noreply@blogger.com