tag:blogger.com,1999:blog-6847048658257278783.post1201005137408634770..comments2024-03-29T01:36:12.851+00:00Comments on Guitar FX Layouts: Nick Greer Ghetto StompIvIarkhttp://www.blogger.com/profile/08416945174853142251noreply@blogger.comBlogger43125tag:blogger.com,1999:blog-6847048658257278783.post-5027203578038401812022-07-10T10:59:57.122+01:002022-07-10T10:59:57.122+01:00In case you and others didn't figure this out,...In case you and others didn't figure this out, the 680r resistor between the emitter and ground restricts the max. volume. <br /><br />Decrease it or even remove it.<br /><br />However, with this gain in volume, you also gain distortion—i.e. because the circuit is now louder it'll cause the diodes to clip sooner. So your lowest gain setting will be more distorted/less clean and the sound of the Gain control at max on the stock circuit might be found at 50% (at the very least, it'll be before max.).<br /><br />You may also find the transistor itself starts to saturate as you approach max. Gain.<br /><br />This could be a plus if you feel the circuit could be more distorted or you simply like having the option of more distortion, but it could also be a negative if you think it works best at lower gain settings.<br /><br />The solution for the latter is simple—keep the 680r and add a switch from the emitter to ground. That way you'd get the stock sound and the new boosted sound that also distorts sooner and harder at higher settings.<br /><br />If you want more volume at lower gain settings, try LEDs or other diodes that require a larger (louder) signal to start clipping. <br /><br />With everything else stock, you could end up with the Gain control at 50% and no clipping, but significantly more volume. Then as you advance the Gain, it'll start to clip and be much louder, but less distorted.<br /><br />With the new diodes AND the 680r resistor removed with the emitter going straight to ground, the Gain control will probably be closer to stock at 0 to 75-85% (i.e. you'll go from clean-ish to overdriven), then as you approach max the transistor will also start to distort, all at a significantly larger volume.Josephhttps://www.blogger.com/profile/10333609805752659835noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-21484578321165599302020-04-12T18:48:31.011+01:002020-04-12T18:48:31.011+01:00I know this a dead topic but anyone know which res...I know this a dead topic but anyone know which resistor could be increased for more volume? <br /><br />Thanks!Zacharyhttps://www.blogger.com/profile/07328176916084163203noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-88431918872735577192020-02-18T22:25:24.897+00:002020-02-18T22:25:24.897+00:00You can build a lpb1 (linear power boost) circuit ...You can build a lpb1 (linear power boost) circuit and put the output of the ghetto into the input of the lpb1 and its output, lpb1,to the switchJcowshttps://www.blogger.com/profile/17120533251982769051noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-7862209457714257172019-12-17T17:36:16.537+00:002019-12-17T17:36:16.537+00:00Built this last week and it is amazing! Sounds gre...Built this last week and it is amazing! Sounds great on my tele but last night I took it to jam and tried it on my bass and oh wow, this thing is killer for a bass, my question though is that i like loud and even with this pedal pinned its not really enough volume, does not match some of the other pedals on my board and i really do not want to get a boost, is there any way to get a bit more volume out of this? Different volume pot or a resistor value change somewhere in the circuit?trevhttps://www.blogger.com/profile/06825124201426994426noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-14365397947607871302015-02-08T22:10:23.507+00:002015-02-08T22:10:23.507+00:00Built this one on Friday. I Found it to be sort of...Built this one on Friday. I Found it to be sort of a "one-sound" circuit - it's either everything at full blast for me or it's just boring. It's bassy and has a fuzzy-drive texture with gain and volume all the way up. Tone also has to be all the way up or it's just mud. Kinda nice for slide playing, but I wouldn't waste too much time with this one. Iagohttps://www.blogger.com/profile/13478141026000247956noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-88947498660195707042014-12-06T10:00:33.404+00:002014-12-06T10:00:33.404+00:00no diego.you got it wrong. we don't need the s...no diego.you got it wrong. we don't need the specifications of 2n3904..when mark said pin voltages, he means that you should take them from your board with a multimeter. it's done like this:<br />supply 9v to the board, and set your multimeter to 20V.<br />then take the COM-black cable from your multimeter to ground of the board.<br />with the other cable (red) of your multimeter, you touch each leg of your transistor or ic in an other case.<br />then you write down each reading that you see in the multimeter for each leg and post it here.ξεναγός νεκρόποληςhttps://www.blogger.com/profile/13463939372683232133noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-12574923480885841572014-12-05T20:22:09.102+00:002014-12-05T20:22:09.102+00:00Product Name : NPN Transistor;Model : 2N3904;Quant...Product Name : NPN Transistor;Model : 2N3904;Quantity : 100 A +/- 2% pcs<br />Collector Base Voltage : 60V;Collector Emitter Voltage : 40V;Emitter Base Voltage : 6V<br />Collector Current(Continuous) : 200mA;Collector Power Dissipation : 350mW;Pin Size : 14 x 0.5mm/ 0.551" x 0.019" ( L* D)<br />Anonymoushttps://www.blogger.com/profile/16219411234871335094noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-14107219667364572582014-12-01T13:14:28.896+00:002014-12-01T13:14:28.896+00:00Post your transistor pin voltages, that will alway...Post your transistor pin voltages, that will always give us the best clue and a good idea where to look for an errorIvIarkhttps://www.blogger.com/profile/08416945174853142251noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-40914985885463075002014-11-30T16:16:42.318+00:002014-11-30T16:16:42.318+00:00you have a mistake!
i can't see the 47k resist...you have a mistake!<br />i can't see the 47k resistor.<br />but even if it's there, it's in the wrong place.from the back of your board i can see it's one hole upper than it should.it should be next to the "c" of the transistor. it seems that you've put the resistor next to the down leg of 10nf cap.<br />check this please and sent back<br />and clean with the a knife or razor all possible unwanted bridges cause looks like there are some...ξεναγός νεκρόποληςhttps://www.blogger.com/profile/13463939372683232133noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-69133311125362643032014-11-30T02:22:04.068+00:002014-11-30T02:22:04.068+00:00I built this circuit this morning and it does not ...I built this circuit this morning and it does not work I have everything ok volume knob does not work does not kill signal when its down. I hope you can help me thanks. Anonymoushttps://www.blogger.com/profile/16219411234871335094noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-34072961892002279502014-11-30T00:17:48.852+00:002014-11-30T00:17:48.852+00:00I'll be trying this again after I build the te...I'll be trying this again after I build the test box. <br /><br />here's the top<br />http://i206.photobucket.com/albums/bb137/denmorin/20141129_185538.jpg<br /><br />and the bottom<br />http://i206.photobucket.com/albums/bb137/denmorin/20141129_191208.jpg<br /><br />you can see in the bottom left corner where the copper broke off.<br /><br />I'm bummed that I made that mistake on the wire from volume 3, and that I'll have to scrap this due to the copper breaking, but that's why I picked an easy one to start with.Carpe DMhttps://www.blogger.com/profile/16098942316841023172noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-28811844741756300892014-11-30T00:00:33.380+00:002014-11-30T00:00:33.380+00:00lol, found a mistake in my wiring as I was taking ...lol, found a mistake in my wiring as I was taking the picture. The wire going from volume 3 to the board was connected to where the led+ should have gone. Carpe DMhttps://www.blogger.com/profile/16098942316841023172noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-8229676734976301702014-11-29T23:47:16.041+00:002014-11-29T23:47:16.041+00:00ok.
these photos seem good to me.it's not clea...ok.<br />these photos seem good to me.it's not clear on tone 2 and 3, and it seems like you've soldered your blue and black wire together in the input jack witch is wrong, but i hope you did it right and it's just a bad angle in the picture.<br />i think that the problem is in your board.so 2 pictures of both sides would be very helpful for us to be able to eliminate other probable problems<br />good luck<br /><br /><br />ξεναγός νεκρόποληςhttps://www.blogger.com/profile/13463939372683232133noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-67544312173614041092014-11-29T23:42:21.516+00:002014-11-29T23:42:21.516+00:00Not the best picture, especially since I gave up o...Not the best picture, especially since I gave up on keeping it neat after a few tries<br /><br />http://i206.photobucket.com/albums/bb137/denmorin/Mobile%20Uploads/20141129_164854.jpgCarpe DMhttps://www.blogger.com/profile/16098942316841023172noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-176323348950499012014-11-29T22:11:16.441+00:002014-11-29T22:11:16.441+00:00This comment has been removed by the author.Carpe DMhttps://www.blogger.com/profile/16098942316841023172noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-88551277479232470902014-11-29T21:57:31.478+00:002014-11-29T21:57:31.478+00:00I was able to get some oscilation after taking eve...I was able to get some oscilation after taking everything apart and redoing the grounding and jacks and the pots make noise.<br /><br />The copper is starting to lift off of my board around the edges, so ill probably just scrap this board and try again after i build a proper test boxCarpe DMhttps://www.blogger.com/profile/16098942316841023172noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-39842770500097802792014-11-29T19:51:07.593+00:002014-11-29T19:51:07.593+00:00hello and welcome!
starting from 2.
yes ground can...hello and welcome!<br />starting from 2.<br />yes ground can go to any of 2 jacks's grounds or to the dc jack ground.<br />you must also ground all together:<br />input's ground,output's ground,board's,pot's in this case, and dc jack's.<br />if you did that, then we can go to no.1<br /><br />check again<br />unwanted bridges<br />orientation of transistor<br />orientation of the 47uf cap<br />cuts(are they clean enough?)<br />and the resistor values.<br />i remember myself putting in 470k in place of 470r and wondering one whole day what's wrong!<br />if nothing works out, just post some pictures of both sides and we'll make it!<br />hope i helped.ξεναγός νεκρόποληςhttps://www.blogger.com/profile/13463939372683232133noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-7929643841690879342014-11-29T19:50:06.507+00:002014-11-29T19:50:06.507+00:00This comment has been removed by the author.ξεναγός νεκρόποληςhttps://www.blogger.com/profile/13463939372683232133noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-28159163619732543772014-11-29T18:19:58.863+00:002014-11-29T18:19:58.863+00:00Hey guys, I picked this pedal as my first build an...Hey guys, I picked this pedal as my first build and I'm having a few issues.<br />1. I wired it without the switch to try and eliminate fault points, but I'm not getting any sound, static, or anything. I double checked the board, it looks fine, so I think it's offboard.<br /><br />2. Where does the ground wire coming from the volume pot go. I feel like a total noob, but I tried hooking it up to where I have the ground wire on the output jack, board, and DC jack with no luck.Carpe DMhttps://www.blogger.com/profile/16098942316841023172noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-33609415947313762782013-05-06T21:08:02.941+01:002013-05-06T21:08:02.941+01:00The LED+ is just to connect the LED on the enclosu...The LED+ is just to connect the LED on the enclosure if you wish to. You can leave it.Geirihttps://www.blogger.com/profile/02343069971234631772noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-31370236480802259112013-05-06T18:53:36.847+01:002013-05-06T18:53:36.847+01:00I used Millenium Bypass...."LED+" what t...I used Millenium Bypass...."LED+" what to do?Anonymoushttps://www.blogger.com/profile/14640163492865366757noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-36528298366035399812013-01-03T17:21:39.554+00:002013-01-03T17:21:39.554+00:00Hi - I'm a newbie and not so familiar with ele...Hi - I'm a newbie and not so familiar with electrical issues. Just a question about the schematic or layout .... <br />Make it sense or/and is it usefull /or possible to bias the circuit? Just in case I will try some other type of transistors?Anonymoushttps://www.blogger.com/profile/13315097553712759780noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-43033968541655698472012-09-12T04:28:28.027+01:002012-09-12T04:28:28.027+01:00being that this is based on the electra, wouldn...being that this is based on the electra, wouldn't it be easy to tweak for more gain?Anonymoushttps://www.blogger.com/profile/01352341176368945240noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-78087496351395400342012-09-11T21:14:20.274+01:002012-09-11T21:14:20.274+01:00I would try doubling all three caps. 220 for 100, ...I would try doubling all three caps. 220 for 100, 22 for 10 and 100 for 47. I would guess that then you would need higher hFE transistor (like MPSA18 or 2N5089) to keep lower frequencies from dying.<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-74679499203806338002012-09-11T21:12:54.370+01:002012-09-11T21:12:54.370+01:00Well the 47n and volume pot create a high pass fil...Well the 47n and volume pot create a high pass filter, but that only starts cutting bass from around 33hz downwards and so it's already really letting all the guitar's bass frequencies through so you're probably not going to notice any difference at all by increasing that cap value. You could try increasing the 10n cap at Tone 1, or maybe make the 100n input cap larger to let more bass into the circuit. But the problem you have is that this is a pretty simple circuit with passive filters so there's only so much you can do without something more advanced to actually amplify low frequencies to give you a real bass boost.IvIarkhttps://www.blogger.com/profile/08416945174853142251noreply@blogger.com