tag:blogger.com,1999:blog-6847048658257278783.post9134240658866928646..comments2024-03-29T01:36:12.851+00:00Comments on Guitar FX Layouts: BJFE / Bearfoot Pink Purple FuzzIvIarkhttp://www.blogger.com/profile/08416945174853142251noreply@blogger.comBlogger70125tag:blogger.com,1999:blog-6847048658257278783.post-14712934254302072322021-12-08T20:01:37.500+00:002021-12-08T20:01:37.500+00:00Hi!
How do you guys actually do the separate treb...Hi!<br /><br />How do you guys actually do the separate treble and bass knobs mod? I mean I found another totally different layout for that but I want to mod this one to 4-knob version...Anonymoushttps://www.blogger.com/profile/03861654094870637618noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-46026009671793946132021-05-12T17:10:24.532+01:002021-05-12T17:10:24.532+01:00
I had got the oscillation problem as Ciaran said ...<br />I had got the oscillation problem as Ciaran said above−there is a small spot at about 80% sweep on Nature pot where a lot of oscillation creeps in. <br /><br />I finally got to know what it was causing.<br /><br />A contact resistance of the pot used for the nature control cause the oscilation problem. <br /><br />Every pot slider has a contact resistance more or less, and this makes feedback voltage.<br /><br />To solve the problem, we have two solutions: <br /><br />- To use a dual pot for Nature Control and assign one of a pair to FET side, the other one to Output stage side.<br />- To separate Nature Control into Bass and Treble - as you know this is another 4 knob version.<br /><br /><br />I hope this will help!rithttps://www.blogger.com/profile/17824138538079703326noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-71454841277165447172019-07-27T18:08:24.329+01:002019-07-27T18:08:24.329+01:00Poster from March 2018 here. Great ideas! I'm ...Poster from March 2018 here. Great ideas! I'm about to open mine back up since the bass knob sweep isn't very good, maybe I'll try your values. <br /><br />Btw I'm phi1 from the pedalpcb forum haha. Philip Claeshttps://www.blogger.com/profile/04511575903488371345noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-80936758605908552702019-07-17T14:36:51.545+01:002019-07-17T14:36:51.545+01:00I built one of these too, with separate Bass (C10K...I built one of these too, with separate Bass (C10K) & Treble (A25K) controls. I made two more mods: I bumped the Treble cut cap from 22nF to 33nF and added a C10K pot in series with the diodes. With the Diode pot fully clockwise, it has maximum compression and predominantly odd-order harmonics. As I back off on the Diode pot, the dynamics increase and the even-order harmonics from the transistors come to the fore. This and the Skreddy Screw Driver are my favorite Dirt Pedals.Chuck D. Boneshttps://www.blogger.com/profile/08018440162976301897noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-4619208768718732172018-03-11T02:56:58.645+00:002018-03-11T02:56:58.645+00:00Couple of mods I did:
1. Used 2 pots for the natu...Couple of mods I did:<br /><br />1. Used 2 pots for the nature so now I have independent bass and treble. I did the same on my HoneyBee build.<br /><br />2. After some testing I settled with using red LEDs instead of the 1n400x's for the clipping. I find I'm able to dial in the gain I like easier and there seems to be more dynamic range and clarity. Maybe I actually just wanted a distortion after all...<br /><br />In regard to the clipping, so far I think I've preferred higher clipping threshold setups (either 1 LED per direction or 2 si per direction) rather than just 1 si per direction. But there's something I can't quite get my head around, and haven't been able to test properly. If anyone has any experience/insight, please chime in. If, in a given circuit, you use 1 si per direction, set the gain knob relatively low and the volume high, then use LED's, set the gain knob higher, and the volume lower, so that both situations have the same level of clipping and total volume... would there really be a difference in clipping character and picking dynamics?<br /><br />All that to say, in this circuit you cannot perform that test exactly. I noticed when no diodes are present, as you turn the gain knob up, you get some clipping from the transistors (though the LEDs clip it further). So, using LEDs rather than si will allow for you to turn the gain knob up higher for your targeted clipping level, thus you have 2 stages of clipping (transistor and LED). In theory this would make for a more interesting sound.<br /><br />Speculation aside, to my ears the si diodes sounded more compressed and fuzzy, while with the LEDs I could dial in more dynamics in clarity.philhttps://www.blogger.com/profile/02802575864443655737noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-77248490238964924862016-05-12T16:59:50.649+01:002016-05-12T16:59:50.649+01:00OMG! I loaded up the 'Tonestack w/LPB1' on...OMG! I loaded up the 'Tonestack w/LPB1' onto this and created a monster. The 'Nature' can be set anywhere and then turn the 'Tone' knob added with the Tonestack w/LPB1 board and.......well you just gotta try it. It's treble Nirvana.Anonymoushttps://www.blogger.com/profile/02519375275213556637noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-29455153274211288002015-12-31T23:02:08.190+00:002015-12-31T23:02:08.190+00:00He he!
I rotated the middle transistor and bye bye...He he!<br />I rotated the middle transistor and bye bye oscilation!Jcowshttps://www.blogger.com/profile/17120533251982769051noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-43973905557175711112015-12-31T22:52:35.911+00:002015-12-31T22:52:35.911+00:00Same issue here. Could it be something with the tr...Same issue here. Could it be something with the transistor(s)Jcowshttps://www.blogger.com/profile/17120533251982769051noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-29159753134244308382015-08-07T01:03:58.008+01:002015-08-07T01:03:58.008+01:00anyone find a fix for the oscillation issue.
I...anyone find a fix for the oscillation issue. <br />I'm getting oscillation with the 2n1308 flipped both way, one way more than the other. Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-12201945736104616482015-06-24T13:20:48.713+01:002015-06-24T13:20:48.713+01:00I built this pedal and I really like it. The 2n13...I built this pedal and I really like it. The 2n1308 is very hard to find. I used the 1n4001 diodes instead of the 1n4007's as they were recommended. I used the 20W for the nature which was a pain to order. Over all I really like this pedal and it is a very straight forward build. Here is a picture of my working build if it might help anyone. Thank you for the layout you guys rock!!!<br /><br />http://s1383.photobucket.com/user/denfox1/media/Mobile%20Uploads/20150622_154142_zpsaeh15pbr.jpg.html?filters[user]=142444066&filters[recent]=1&sort=1&o=0Anonymoushttps://www.blogger.com/profile/17552397697382107219noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-5020788585379330922015-01-09T18:03:58.349+00:002015-01-09T18:03:58.349+00:00Jut build the pink purple fuzz but unfortunately i...Jut build the pink purple fuzz but unfortunately it isn't working. The only sound that is coming through is hiss. The hiss can be altered with the nature and the volume control. When the nature pot is adjusted you can hear more bass in the hiss. That way I think the nature and the volume pot are working like they should.<br /><br />Measured the transistor values and they seem to be almost the same as JaviCAP.<br /><br />Q1 (2N5952)<br />D: 6.28<br />S: 1.80<br />G: 0.00<br /><br />Q2 (BC550C)<br />C: 5.48<br />B: 3.19<br />E: 2.61<br /><br />Q3 (AC127)<br />C: 2.30<br />B: 0.94<br />E: 0.86<br /><br />Did check the orientation of all components, found that the 10K resistor was not placed correctly, the rest seems to be OK.<br /><br />Can someone help me out?<br />Anonymoushttps://www.blogger.com/profile/10817798997292012854noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-85814931824698934182015-01-05T18:19:54.452+00:002015-01-05T18:19:54.452+00:00Built this some days ago and i love it! It`s a rea...Built this some days ago and i love it! It`s a realy great fantastic high gain distortion pedal and i have no oscillation anyway. To get closest to the 14K7 resitors i used 15K and 1M in parallel (looks funny too). But to make it perfect for me i`m thinking to get some more bass through the circuit. Any sugestions what cap to increase? Thanks for the great stuff!Veithttps://www.blogger.com/profile/11734684451074757086noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-45295203739591422492014-11-26T02:07:22.450+00:002014-11-26T02:07:22.450+00:00I built this yesterday and it sounds really good b...I built this yesterday and it sounds really good but I'm getting the same oscillation problem as myrkky and ayeritehi<br /><br />It's annoying because it sounds super good except for the oscillation. My voltages line right up with myrkky and javi's working builds if you account for my power supply putting out about 9.6v<br /><br />I'm going to keep looking for a fixTravishttps://www.blogger.com/profile/00836791717229314419noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-15688592855157893382014-02-04T15:33:53.852+00:002014-02-04T15:33:53.852+00:00Hmm, quite weird. My first build had exactly that ...Hmm, quite weird. My first build had exactly that ridiculous amount of gain on tap and I used it maxed out - it sounded amazing. Now I made another one which sounds exactly the same but I get crazy ass low frequency oscillation at certain points of the nature pot taper. I'm 95% sure the tranny is the right way around, I tried a few different NPN germaniums even. If I put it the other way around it certainly helps and I only get oscillation at one point of the taper which is something like 15% from the beginning. Less gain and actually, doesn't sound as good. Not as juicy, open and midrangey. Annoying.Anonymoushttps://www.blogger.com/profile/15559641484345627677noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-66390987844072351152014-01-23T22:04:03.378+00:002014-01-23T22:04:03.378+00:00Just use 15K. Bjorn only uses 14k7's because ...Just use 15K. Bjorn only uses 14k7's because he bought a huge batch of them a few years ago in a closing shop sale, if he didn't have them I'm sure he'd be using 15K too.IvIarkhttps://www.blogger.com/profile/08416945174853142251noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-48167215810587819842014-01-23T21:42:15.149+00:002014-01-23T21:42:15.149+00:00Anyone got a good link for 14.7k resistors in the ...Anyone got a good link for 14.7k resistors in the UK? Planning on building this with an 2N5458, BC550C, AC176.Jack Roperhttps://www.blogger.com/profile/17141785810231939430noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-69027402606563937862014-01-17T07:39:09.032+00:002014-01-17T07:39:09.032+00:00God I regret selling my clone already. I gotta bui...God I regret selling my clone already. I gotta build another one.Anonymoushttps://www.blogger.com/profile/15559641484345627677noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-71139813358665641152013-12-28T13:13:28.614+00:002013-12-28T13:13:28.614+00:00Just finished this one. Fantastic pedal! Used NTE3...Just finished this one. Fantastic pedal! Used NTE312 (alt for 2N5952) and russian MA37 (sub for 2N1308). Compared closely to the Proguitarshop demo and sounds to my ears exactly the same (or extremely close). <br /><br />If anyone else is getting oscilliation at some spots on the fuzz and/nature pot sweeps, it might be you have the germanium tranny (2N1308, in my case MA37) reversed - as in collector and emitter need to be switched around. I found that even when reversed, the pedal will appear to "work". In fact, the gain is ridiculously high when fuzz is maxed if the germanium tranny is reversed, and one might think that pedal is working as intended. Other pot positions sound pretty good too. But you will get oscillation at some spots and the same knob positions as the demo won't produce the same sound (you'll get more gain than you should).<br /><br />Great job on this layout Mark! Thanks!Anonymoushttps://www.blogger.com/profile/04797941237807785345noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-73766192149547360452013-12-01T17:10:26.054+00:002013-12-01T17:10:26.054+00:00Wow, this is a killer fuzztortion. Enough gain wit...Wow, this is a killer fuzztortion. Enough gain with a tight bottom end and fast attack to act as a standalone dirt pedal for high gain stuff into a clean amp.Anonymoushttps://www.blogger.com/profile/15559641484345627677noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-42131131647391087282013-10-22T23:23:03.489+01:002013-10-22T23:23:03.489+01:00Just a little tight :P
Just a little tight :P<br />JaviCAPhttps://www.blogger.com/profile/15831602988871935058noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-84623096253219033642013-10-22T23:15:38.771+01:002013-10-22T23:15:38.771+01:00Insane! :o)Insane! :o)IvIarkhttps://www.blogger.com/profile/08416945174853142251noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-67127680161252734842013-10-21T00:23:42.108+01:002013-10-21T00:23:42.108+01:00Finally, I was in the mood to box it, and here it ...Finally, I was in the mood to box it, and here it is:<br /><br />https://scontent-b-mad.xx.fbcdn.net/hphotos-prn2/1385611_556834091055110_1376833249_n.jpg<br /><br />BRJaviCAPhttps://www.blogger.com/profile/15831602988871935058noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-67151488812161903782013-09-23T16:23:25.875+01:002013-09-23T16:23:25.875+01:00Thanks for your help John! ;)Thanks for your help John! ;)Anonymoushttps://www.blogger.com/profile/15415118467841548777noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-26715160021345052202013-09-23T04:33:36.382+01:002013-09-23T04:33:36.382+01:00yes, that one will work fine. I used one of these ...yes, that one will work fine. I used one of these since I prefer alphas with solder lugs and a solid shaft.:<br /><br />http://www.pedalpartsplus.com/mm5/merchant.mvc?Screen=PROD&Store_Code=PPP&Product_Code=7520&Category_Code=16mmWjohnkhttps://www.blogger.com/profile/00643996045674470081noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-50838585836386679482013-09-23T04:25:07.725+01:002013-09-23T04:25:07.725+01:00Hey guys, I'm just wondering is this the right...Hey guys, I'm just wondering is this the right 20k w pot for this project?<br />http://www.taydaelectronics.com/20k-ohm-w-taper-w20k-tone-control-potentiometer.html<br /><br />Cheers! Anonymoushttps://www.blogger.com/profile/15415118467841548777noreply@blogger.com