tag:blogger.com,1999:blog-5481402030233340127.post6590740935420770635..comments2024-03-28T17:24:07.520-04:00Comments on Perf and PCB Effects Layouts: JHS MiniBombdtgehringhttp://www.blogger.com/profile/09555201436004501222noreply@blogger.comBlogger50125tag:blogger.com,1999:blog-5481402030233340127.post-4026352510272671662022-08-08T14:00:18.908-04:002022-08-08T14:00:18.908-04:00This comment has been removed by the author.Elwee2046https://www.blogger.com/profile/08319291753002122543noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-45741407595720312272022-04-15T13:41:49.919-04:002022-04-15T13:41:49.919-04:00can i use 500k for the potentiometer?can i use 500k for the potentiometer?Adrianohttps://www.blogger.com/profile/11221258708392831154noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-32604608869225880292021-09-26T03:38:24.035-04:002021-09-26T03:38:24.035-04:00Does this circuit have unity gain, when the pot is...Does this circuit have unity gain, when the pot is fully ccw?Mr.Baiserhttps://www.blogger.com/profile/11045675646569701854noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-19077592569363228672021-06-28T20:09:50.582-04:002021-06-28T20:09:50.582-04:00Just put this together and there is a huge amount ...Just put this together and there is a huge amount of noise. Whats interesting and hopefully helpful is that as you turn up the boost pot noise goes from no noise, steadily increasing with signal volume until near the end where it starts to decrease and isnt that terrible by fully CW.<br /><br />Gate and source are at 0v, drain is at 4.4v. Any ideas?<br />Sethhttps://www.blogger.com/profile/07127862718803548143noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-37382233956669251192021-05-08T16:25:11.203-04:002021-05-08T16:25:11.203-04:00Sounds a wrong voltage Bias. You need to adjust th...Sounds a wrong voltage Bias. You need to adjust the value of that 5.6k resistor to bias the JFET correctly: about 4.5v to Drain, use a normal pot as variable resistor to get it, once it's sounding good, measure the resistance of the pot and replace it with a similar value resistor.IvMhttps://www.blogger.com/profile/02555112437631034123noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-47252856667273111262021-05-08T15:59:17.415-04:002021-05-08T15:59:17.415-04:00Yes, to get 4.5v or close. Match it with your Jfet...Yes, to get 4.5v or close. Match it with your Jfet :DIvMhttps://www.blogger.com/profile/02555112437631034123noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-29446575011926118162021-02-28T20:40:18.950-05:002021-02-28T20:40:18.950-05:00Instead of 5.1k?Instead of 5.1k?Zaraki1337https://www.blogger.com/profile/04815656896624384794noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-74606784836929679192021-02-25T03:09:42.365-05:002021-02-25T03:09:42.365-05:00It workes but it gets distorted
I used resistor...It workes but it gets distorted<br /><br />I used resistor 5.6 instead of 5.1<br /><br />And 2n5457 instead of j201..<br /><br /><br /><br />It is boosting but there is distortion i lowerendZaraki1337https://www.blogger.com/profile/04815656896624384794noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-66680812502294538432020-05-16T07:39:05.009-04:002020-05-16T07:39:05.009-04:00I figured out the problem. For anyone else having ...I figured out the problem. For anyone else having the same issue, it was the bias resistor. I tried every value resistor I have and 1K worked best.LucasManhttps://www.blogger.com/profile/03198854811625320521noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-68659988997469193522020-05-13T23:55:59.477-04:002020-05-13T23:55:59.477-04:00I'm getting an overall volume LOSS. I've g...I'm getting an overall volume LOSS. I've got it breadboarded, so I'm able to quickly short the input straight to the output and compare. I've got hot pickups that get a little dirt from the amp when I go direct, but it's super clean running through the circuit.<br /><br />I used a B500k, as I didn't have a B1M on hand. I'm wagering that's the culprit?LucasManhttps://www.blogger.com/profile/03198854811625320521noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-9693180130817875882020-01-08T16:32:42.142-05:002020-01-08T16:32:42.142-05:00Try increasing the output cap value to like 1uF.Try increasing the output cap value to like 1uF.Effects Layoutshttps://www.blogger.com/profile/11341183658959824998noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-25391516277441389132020-01-08T09:46:26.530-05:002020-01-08T09:46:26.530-05:00Hi) I collected it. It works. A very good sound. D...Hi) I collected it. It works. A very good sound. Dense, bright. Collected. I advise everyone to assemble the guys. Just a question, I connected a bass guitar, and when turned on, low frequencies are cut off (below 125 approximately. What can be replaced so that the bass remains? Or not?Aleksandr 88https://www.blogger.com/profile/15228628411250893047noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-23352527110121384152019-11-08T12:37:13.087-05:002019-11-08T12:37:13.087-05:00Yes. Attach it from the solder side. Pot lugs left...Yes. Attach it from the solder side. Pot lugs left to right: 3-2-1Effects Layoutshttps://www.blogger.com/profile/11341183658959824998noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-80998388306625057922019-11-08T12:05:32.126-05:002019-11-08T12:05:32.126-05:00@Effects Layout - uhmmm dumb question, but the pot...@Effects Layout - uhmmm dumb question, but the pot in the layout? should it be attached in solder side? looking at the pot in your layout, pin1 is the right most and pin3 is left most?Anonymoushttps://www.blogger.com/profile/09982997811011834246noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-25030401651358501902019-10-30T17:10:33.513-04:002019-10-30T17:10:33.513-04:00It works, the drawing is good. I built a few pedal...It works, the drawing is good. I built a few pedals from the drawings here. Thanks for them.Mishahttps://www.blogger.com/profile/07122820812261635913noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-71591228066872880212019-07-14T16:03:07.604-04:002019-07-14T16:03:07.604-04:00no, bs170 and 2n7000 are mosfet, you should use a ...no, bs170 and 2n7000 are mosfet, you should use a jfrt transistor, j201, 2n5457 or mpf102 will work fine<br />E:T:https://www.blogger.com/profile/17329067138068155663noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-78662356994356316612019-04-04T22:50:44.530-04:002019-04-04T22:50:44.530-04:00CAE Boost/Line Driver.CAE Boost/Line Driver.Iagohttps://www.blogger.com/profile/13478141026000247956noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-80088725676437624022019-03-16T15:30:30.144-04:002019-03-16T15:30:30.144-04:00o meu esta dando um estalo ao ligar e desligar no ...o meu esta dando um estalo ao ligar e desligar no volume minimo como resolver esse pulldown?Taihttps://www.blogger.com/profile/06766192344752602088noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-43989550307797049542019-03-12T02:06:05.210-04:002019-03-12T02:06:05.210-04:00Built it point to point in a 1590a using this perf...Built it point to point in a 1590a using this perf as guide. Used a 4.7k to bias cause it is what I had. Sounded great so I left it in. Used j201. This is a nice little boost. Definitely worth building! Blackwinghttps://www.blogger.com/profile/16864575046719143800noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-55311158413201705052018-12-10T18:04:09.246-05:002018-12-10T18:04:09.246-05:00Hi, i have a question. On J201 voltage on drain is...Hi, i have a question. On J201 voltage on drain is about 4.05V, on 2N5457 it's about 0.8V<br /><br />What should be the correct value of voltage to have perfect biasing on both transistors? Anonymoushttps://www.blogger.com/profile/05144884074393653017noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-10197411707778485232018-10-09T08:31:00.977-04:002018-10-09T08:31:00.977-04:00I've been interested in using the simple circu...I've been interested in using the simple circuit for a clean boost, but I was just going to emulate it online first, and I seemed to notice two things, 1 this circuit phase inverts, and 2 looking at the output curve it doesn't look as clean as I would have expected from a clean boost:<br /><br /><br />http://www.falstad.com/circuit/circuitjs.html?cct=$+1+0.000005+2.1831051418620846+50+5+43%0AR+64+96+-48+96+0+1+1000+1+0+0+0.5%0A174+64+192+128+96+0+1000000+0.27230000000000004+POT%0AO+256+96+288+96+0%0Ag+64+192+64+208+0%0Ar+176+96+176+16+0+3100%0Ar+256+96+256+160+0+100000%0Aw+176+128+176+96+0%0Aj+128+144+176+144+32+-1.5+0.00125%0Ag+176+160+176+208+0%0Ac+208+96+256+96+0+1.0000000000000001e-7+4.822625220565602%0Ag+256+160+256+208+0%0Ad+128+48+128+16+1+0.805904783%0A209+64+16+64+48+0+0.000022+9+1%0Ag+128+48+128+64+0%0Ag+64+48+64+64+0%0AR+64+16+64+-16+0+0+40+9+0+0+0.5%0Aw+64+16+128+16+0%0Aw+128+16+176+16+0%0Aw+176+96+208+96+0%0Ao+0+4+0+4099+2.5+0.00009765625+0+2+0+3%0Ao+2+4+0+4098+5+0.1+1+1%0A<br /><br />Any diy clean boosts you think would be better for getting incredibly true to the original input signal just amplified?Serengeti Wutlifehttps://www.blogger.com/profile/04726311316787048120noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-81996074733471749392018-09-28T08:13:02.010-04:002018-09-28T08:13:02.010-04:00Hi David,
how to realize when the bias is well ad...Hi David,<br /><br />how to realize when the bias is well adjusted? when the sound looks clear and fluid it is good? is there a value in mv to respect as on the amps?<br /><br />Best RegardsFranckyhttps://www.blogger.com/profile/13361247638684836110noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-6530184714134008162018-09-14T01:54:12.757-04:002018-09-14T01:54:12.757-04:00Thank you so much!!! Thank you so much!!! oorellanarhttps://www.blogger.com/profile/07212256553589218521noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-82430194364893959142018-09-13T09:20:35.894-04:002018-09-13T09:20:35.894-04:00Check out the General Layout Notes tab for off-boa...Check out the General Layout Notes tab for off-board wiring.Effects Layoutshttps://www.blogger.com/profile/11341183658959824998noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-53637532941532257832018-09-13T04:06:16.849-04:002018-09-13T04:06:16.849-04:00Hi!!
Can you help me with some problems?
The IN an...Hi!!<br />Can you help me with some problems?<br />The IN and OUT of the PCB, where do I have to connect it? <br />I'm confused with that, I don't know if I have to connect it<br />to the 3pdt switch or to the jacks?<br />Greetings from Chile!!oorellanarhttps://www.blogger.com/profile/07212256553589218521noreply@blogger.com