I don't know what Paul's suggestion was, but if I wanted to reduce the gain I'd lower the gain pot, and maybe instead of the diode clipping options just include a 3 series pair like the Xotic RC Booster. I would guess that it is in parallel with the 3K3 between the inverting input and output of the second opamp channel and this will act as a filter which would make an audible difference I would say. (haha it is a VOLUME pot I guess).Thanks for clarifying everything Dave, sorry for the novice questions, I'm sure everyone else on here knows this stuff pretty well. If it was centre positive DC then the polarities have been reversed and you could have damaged any of the polarised components. Thanks a lot for that Dave, really helpful. Der Versand aus USA geht meist recht schnell. I get 9.3V on the multimeter when I test the PS directly, but 0V once plugged in... :/. For the benefit of supporting the producer I have just ordered an original one, as you advise as well. As usual !Thank you!I will try modding it a bit. 2 of the best ODs. This may be a strange question, but this is my first Timmy so I'm not sure whether it's normal - turning the treble knob clockwise causes an apparent drop in volume. All it says on the thing is LED+ and on the offboard wiring there is nothing. Instead, it puts the focus on eliminating unwanted upper and lower frequencies. Es ist möglich, dass diese oder andere Websites nicht korrekt angezeigt werden. Any suggestions on what might have gone wrong?Cheers/Johannes. IvIark, you are great, fast and competent. He's done great things with the team. Does anything get hot? Both down is regular mode. Prymaxe in USA verkauft das Timmy für 129,-- US$. AMAZING!!! Here's a photo of it: http://instagram.com/p/Ma6TqPy98h/Thanks Mark! Cochran baut alle selbst auf Bestellung, einen Vertrieb gibt es meines Wissens nicht, also gebraucht schauen, ist immer mal wieder einer zu haben. I'm a spurs fan. Leads me to think I have some grounding issue. As I follow the signal with an audio probe it is as it should be until it gets to pin 6 of the op amp. These are the voltages I'm getting:1 - 5V2 - 5.45V3 - 2.24V4 - 0V5 - 4.91V6 - 4.95V7 - 5V8 - 9.09VLooks like pin 3 might be the issue? It's wired up correctly, but it seems to be working more like a volume control. By the way, I just finished this build, and it sounds sweet. With the gain at zero the pedal puts out 12dB, so changing the volume to 25ka and adding an 18k resistor from input to output fixed this for me. So no other tonal or noise consideration? So I managed to get this pedal working (kind of). I had something to do with removing the tone controls and clipping diodes. If I turn the Drive knob below about ten o'clock, there's no output from the pedal. On high treble settings I get a slight high pitch oscillation-like sound. I'm also trying to figure out how the Treble control works exactly, since that's connected to Pin 1 of the Drive pot as well. The middle position should be louder because the other positions add the diodes which compresses the signal more. Here's my build, just for personal use. But Milkit supports Everton and so do I when they play Liverpool :o). Everything is muffled. The IC could have been damaged too so those are the first things I'd check, Hey Mark, first off thanks for all the help and time you put into helping us new hobbiest learn the craft. Das MXR Custom Shop Timmy Overdrive Pedal bietet Musikern ein breites Spektrum an 'kernigen' Sounds, die den Klang des Setups erweitern ohne dabei das eigentliche Voicing zu verändern - in einem kompakten MXR Mini Pedal. 15 Jahre Timmy V3 Anniversary Overdrive Pedal Paul Cochrane ist in der Effektpedal Welt kein Unbekannter: Er ist der Erfinder des „transparenten Overdrives“. Both those wiring diagrams are acceptable and are actually the same.Make sure the IC JRC4549 is in correctly with the cut out notch to the top.Check that you have no shorts at the back of the vero (Use a Magnifying Glass) Builders run knife, hacksaw blade or hot soldering iron down the rails to fix. I wired everything up and its all working fine except that it's super bassy and it cant be dialed out. Manchmal sind die Päckchen/Pakete schon 1-2 Tage später Tag in Frankfurt. Timmy is really amazing. Have you looked at the switch wiring diagram on the Offboard page in the menu above? Second, the Bass control is wired to affect your signal before it hits the overdrive stage, so you get a cleaner, more focused low end. - what do they actually mean? Thanks rizibiz, I've built this and although I haven't still got the pedal I can't remember it working backwards. It effects both modes of the pedal. The MXR Timmy has more dynamic presence than your … would it be at the ground output on the board or to the sleeve of one of the jacks etc?So that means both volume lug 2, and the circuit output go to the bottom right on the switch?Thanks again Dave, think I have my head around it now! Just built this. My guess is something fried but is it safe to say what would fry? thanks so much for the blog! Some really great sounds but is it me or is the gain pot pretty much useless below 50% on a clean amp? are they in the original... like part of the Timmy mojo sound? They're essentially identical and the scheme I did the layout from is definitely right, Paul Cochrane confirmed it. Thanks! - are the changes subtle? If it is not the old model, will send pics asap :))). Using a 4558 if that affects "normal" at all.I don't know what those numbers *should be* so I don't know what would indicate a problem ... the variation doesn't seem huge, but I'm guessing it doesn't take much voltage to change the gain. Paul Cochrane TIMMY extrem günstig oder Fake ? It may not have as much overdrive as you would expect, but it adds a gradual gain-bump to the point of light compression and a very pleasing natural breakup. In the wiring diagram you linked to, volume 2 would connect to the footswitch lug in the bottom right corner of the switch.Hope that clarifies it.CheersDave. Just want to thank you, Ivlark for all these great layouts. Very interesting!! Thanks man! This thing sounds pretty much perfect.. Im Tracking habe ich schon gesehen, daß die z.B. I probably wouldn't remove the diodes completely though because if the opamp starts clipping it's not particularly pleasant compared to diodes. I just built this but used LM1458 instead since I didn't have the other. It's a static/hiss and that's it. Die Grenze, unter der keine Abgaben anfallen, liegt bei nur 22 Euro. This pedal can be powered by a Dunlop ECB003 9-volt adapter, or the DC Brick™, Iso-Brick™, and Mini Iso-Brick™ power supplies (not included). If you don't want it that high and would prefer a better resolution of control at lower gain settings, then change the Drive pot to a 500K. Does that mean I've got a short somewhere? Reverb.com demo of the Timmy . They're the same size as caps I have in stock so I used the bigger one basically because there was enough space for it. Are the pots the same values as the lovepedal? Once the resistor is part of the board, it is sure to be a part of a a resistor network and you are reading a resistance of the entire resistive network at these two points. Would the greenies be preferred? Timmy mit Strat in verschiedenen Settings: Klicke in dieses Feld, um es in vollständiger Größe anzuzeigen. However, Vemuram pretended that it was an original design he made up listening to old Fender amps during 3 years... And sold the pedal at an indecent price for an analog pedal… thank you! Many aspiring guitarists have added a Tube Screamer to their setup in the hope of … At least I can compensate with the Level knob in the meantime... Post the IC voltages and we'll see if that gives any clues, but I suspect it will probably look ok with the pedal mostly working correctly which will point to maybe a temperamental components or a unwanted micro bridge somewhere, Just finished one...It's a phone camera so colors are a bit off.https://lh3.googleusercontent.com/-TqAYDsTEpMI/UcH-W89D8HI/AAAAAAAAA5s/Nj8MZBfdliw/w1029-h772-no/IMG_2560.JPGhttps://lh4.googleusercontent.com/-g5NzALSGydE/UcH-etZuf0I/AAAAAAAAA6Q/LLfZtMoh1TE/w579-h772-no/IMG_2561.JPGhttps://lh3.googleusercontent.com/-THlKxwf_PwI/UcH-e-kgwzI/AAAAAAAAA6c/k9modcO_3LQ/w579-h772-no/IMG_2564.JPGTrying to think outside the box with the led placement and installation method....worked out pretty well.https://lh6.googleusercontent.com/-t1-9BvAqCko/UcH-e2v_SpI/AAAAAAAAA6Y/27CS_bwocCU/w579-h772-no/IMG_2568.JPG, Ha ha, nice job Goran, thanks for the pics. It gives the pedal a very "bluesy" feeling and sound, cuts the gain down.I am curious to compare with the original pedal, when it arrives.Thanks again for the advises. Thanks for the fast reply! Then the centre position adds no additional diodes and just leaves the ones on the board in circuit. The idea is that as you increase gain the treble and bass pots are rotated to the same position as the gain pot to keep a flat response. When you get the original, if you send me a pic of the front and back of the board I'll post a Timmy 2014 layout, It is a second hand one. Any thoughts? Hope you've got ya royal blue jersey ready for tonight mate! This can help with RF noise and I've seen values from 10p to 100p used in that position.3) The 2n2 seems to be a new addition. Yes, in fact I've heard some people say the LM1458 sounds really good in there. :o) But basically yes, that is exactly what you should expect. An additional filter cap somewhere? So, the MXR CSP027 TIMMY brings plenty of that transparent gain to your pedal board. I don't have the DPDT switch hooked up which I assume should still work? Also my IC pin 5 is reading at 0.8V, any thoughts on where I may be going wrong? Would it be the chip? I let my friend try it out and he hooked it up with a 12v adapter instead of a 9v and now it doesn't work. I've been building a few pedals up, used to get kits, but this is way more fun. Here's the voltages I'm getting at the IC, all knobs at noon and the switch in the middle:1 - 1.682 - 1.753 - 1.574 - 05 - 1.716 - 1.737 - 1.738 - 9.02Any ideas on other places to look at this one?Thanks! Hopefully I'll be comparing this to my Timmy V2 before the end of the day. Any ideas? Upon inspection I have run the pedal off a 12V I believe with a 0.4A output. Für eine bessere Darstellung aktiviere bitte JavaScript in deinem Browser, bevor du fortfährst. It became one of the most sought-after overdrive pedals. Das Pedal basiert auf einer Schaltung von Paul Cochrane, die ohne Zweifel zu den besten und bekanntesten am Markt gehört. I'm assuming if my Treble control works then that part must be right. Thank you for taking the time. This is my first build and I had a quick question. When I switch to one of the extra diode settings there is a little bit of a volume drop. This may be a dumb question, but I'm new at this, so bear with me:I have an On-On-On DPDT switch. I have some of the big blue bc 47uf lytics. For instance, Paul Cochrane of “Tim” and “Timmy” pedal fame recommends not using the pedal in front of a Fender Blackface amp. Don't know about the switch, I don't think it would work the same (the DPDT is on/off/on), This is my first more advanced build. In fact pretty much any diode would do, you could put a 1N4148 in there if you want. I put this lower left condenser, in quoted(esteemed) by the cut and to replace the one who is to indicate above on the right (in quoted(esteemed) by the sons(threads) "volume3", " treble 1 ", "9v) by a rider. Zum Bespiel daß (un)absichtlich, naja, ich lasse mich überraschen. From Schematic to Stripboard September 2012 © http://tagboardeffects.blogspot.com Updated 23rd September 2012 A lot of people have asked... A few people have commented on posts asking about offboard wiring. )Which way is asymmetric and which is compressed? Just amazing. Still absolutely loving this thing. Is that because of the pot? as seen on Mammoth Electronics); are they better? When you put it that way the control seems a bit simpler. Just built one of these (on a PCB) and since I did not have a 4559 I've tried 4558, 072, and 1458 and liked the 1458 the best. More importantly...Of the 2 additonal clipping examples, which one is the one that comes with the original Timmy? Can I get some more info on the clipping of this pedal? The use of two switches allows an additional position with on switch up and one switch down which sets the pedal for Just wondering if that's normal. Banzai and Musikding has them for less..+m. The option with the 2 switches allows you to switch the additional diodes individually and so you can replicate exactly what you can do with the original version Timmy. You really can’t get enough of them, and I can say pretty confidently that overdrive pedals have the most number … i used a socket and when i swapped the chip 4559 for a 4558 it worked. Aber dann dauert es eben bis zu 1-2 Wo, bis der Zoll damit fertig ist. We always talk about DC voltages when we're trying to debug pedals because that's what is used to provide the transistors and opamps with their supply, but the signal from your guitar is AC which these things are designed to amplify. I had read that, but it still seems like the majority of te gut shots I see have either the red or green poly caps. I get asked frequently about where to buy components from, and I know a lot of people, like me, have got together a huge stash of parts so t... Big Daddy and Grace circuits have this at the end of their document page:  The two circuits are very similar and it may be possible to use a... Not all these layouts are verified and some are put together from unverified schematics. Der Zoll hat in den letzten Jahren durch ebay und Internet-Handel auch viel dazu gelernt. If there's a job out there writing textbooks on pedal-building, you'd be perfect for it. Also can I use a standard wiring diagram such as this one from Beavis Audio:http://www.beavisaudio.com/techpages/StompboxWiring/Or does it have to be wired in a specific way?I'm pretty new to this so any help would be great, Eric, you can use that wiring diagram, but read on....The wiring instructions on this site are very simple when you get used to them. Both the Tim and Timmy pedals had the same basic overdrive circuit and controls, with volume, gain, treble, and bass knobs, but the Tim was a bigger pedal with a foot-switchable 2-knob boost function and a 3 position diode selector. The pedal’s based on a design from veteran pedal builder Paul Cochrane that’s widely celebrated … It's more noticeable when using a single coil Strat. are D6 and D7 wired in the same direction as one another?also - are they wired in the same direction as D5? Again, the 2nd pedal acts as a “gate” and dictates the overall volume. D5 stripe also faces to the left.You can see it quite clearly if you zoom in the picture a bit. My build of the Timmy, metallic purple with added sparkle flakes.http://instagram.com/p/cz7mbOxWE6/, I've built a few of these for some friends and they're awesome. I love it. So all I can advise is going over the layout very closely making sure your values are correct, knife between all the rows to make sure there are no unwanted bridges, redo the cuts to make sure there are no burrs which may be making unwanted connections and if all that fails then you may have to start swapping components to see if one is faulty. After fixing that my bypass volume seemed perfect but the effect didn't work. Copyright © 2010-14, tagboardeffects. The IC does need a DC supply though so I suppose that could have failed and would be the first thing I would swap. cap and a bunch of radials (16 v). One way will clip the top of the waveform, the other way will clip the bottom and it's unlikely anyone would notice which was which. Audioprobing confirms that a signal enters the first OP, but none leaves.I have tested the OP-amp in another circuit, and confirmed that it is indeed working. Noticed one annoying thing. Thanks! Clicking the pedal on and off, the MXR Timmy sounds as seamless as switching from clean to a mild gain channel from a tube amp. If we assume that the 1N4149 diodes each have a forward voltage of 0.7V that just means that the diodes will start their work when the signal exceeds 1.4V (0.7V x 2). Still sounds like my amp though which is awesome! Sounds really nice. out of curiousity, does anyody know his gear? I had cut the hell out of the gaps before, but I re-soldered the 3k3, and cut all the gaps even more, and viola! Also the led light stays allways on either when bypassed or engaged!!! (http://www.diystompboxes.com/pedals/debug.html)You could try to trace where the signal dies with one of those (it's just a guitar cable with ~100n cap).Also, you could measure the voltages on the IC pins, so if there's something wrong with those...+m, When connecting the clipping switch, which way should the wires go on the two pads? Thanks in advance!!! my build of the timmy: http://imageshack.us/a/img543/8942/drva.jpgit really sounds awesome... i liked it a lot when playing solo at home, but i realized when i used it in my band, i couldn't believe how both full and articulate my guitar sounded... Dude that is gorgeous. It seems to me that I see layouts with the red ones (Polyfilm? All in all it stacks very nicely with other pedals. That should cure it.+m. at Pin 1 I get 4.55v when fully CCW and 3.98v at Pin 2.Fully CW, I get 4.03v at Pin 1 and 4.45v at Pin 2. It really is a great pedal, very versatile. Thanks. One weird anomaly I noticed was sound only comes through the pedal (after the incident) when the output cable is half way in to the jack (the point where the tip hits the ridge that the ring should sit on. The Tube Screamer has a pronounced mid-bump, so for a different EQ profile, you could try a Zendrive or Timmy. Just built this tonight and it sounds great. Das MojoMojo, dass mit Humbucker ordentlich Gainreserven hat, ist bei mir ( Strat ) im Rythmusbetrieb auch bei Vollgain eher … “It’s an honor to work with MXR,” Paul says. Lug 2 from volume pot goes to the top right lug on the stomp? I'm Mancunian, United all the way. gain: 10:30-11. volume: 10-10:30. bass: 8-8:30. treble: 9-9:30 I was playing my strat and this settings as a dirty-clean channel and as a boost for Okko Diablo. found my problem. Voltages seem low on the IC, but are 7+ elsewhere on the board (at the switch, diodes, caps). It doesn’t sound different – the … With a 5K pot it's like having a 50K pot that can only move from the 7 o'clock starting position (fully counter clockwise) to the 8 o'clock position. Anyone compared the sound from one of these builds side by side with a real one? seinen großer Bruder Tim, und definiert damit … With everything at 12, when you step on it it's like someone threw a blanket over the amp. Some help troubleshooting would be appreciated, since this is my first "from scratch"-pedalbuild.Not sure what information is relevant, but here are some voltages:V+ = 9VVref = 6.31Vpin4 =~ 1mVpin8 = 8.98VWhich seems okay to me.With the pedal engaged and a 0.26V sine wave @700Hz in the input, I read the signal at 0.03V at pin 3, but not in pins 1, 2, 5, 6 and 7 (only the 50Hz signal at 0.016V). Here's what MXR says about the Timmy Mini Overdrive Pedal: The MXR Timmy Overdrive provides a huge range of gritty, textured tones that enhance your rig’s sound while preserving its fundamental voice—and in an MXR mini housing, it’ll free up serious pedalboard space. The diodes on the board are essentially bypassed because the diodes on the switch means the signal level can't reach the point when the board diodes start to limit the signal. Thanks! Really great sounding OD! When Paul decided to bring his pedal to a wider audience, he chose to work with the MXR design team. D6 stripe (negative) faces to the right, D7 stripe (negative) faces to the left. Sort of but not quite. This is why capacitors are used in between stages because they block DC used for the supply of the active components, and only allow the AC signal from your guitar to pass to the next stage for further amplification or filtering etc.So in this pedal the AC voltage that comes into the circuit from your pickups is amplified by the opamp and clipped by the diodes in the feedback loop which distorts the signal. Is there any particular place lug 1 has to connect to ground? First, the Treble and Bass controls on Timmy are cut-only, which prevents you from overhyping your signal. It seems to be somewhere between the output of the op amp and the subsequent 3k3 resistor. The compact layout is more recent and was done when I was going through a phase of adding series reverse polarity protection to everything. I have actually done the mod and I really recommend it. This is my first proper build, any advice on this would be great :). Fixed!It turns out I'd accidentally put a 100nF cap in place of the 10nF. Here's a collection of vero (stripboard) and tagboard guitar and bass effect layouts that we have put together covering many classic and popular effects in growing numbers. Is the 3 way dpdt the on/off/on variety?Great work on this btw & thanks! Just not sure what Volume 1 to ground, Volume 2 to output, and the Volume 3 mean and where there'll all supposed to be wired. What are the correct IC pin voltages? Yes, definitely.