Availability of componets: Average. thank you for the help, I replaced the diodes (4007s), the 1u cap (polarized - negative at top), and IC2 TL072. Thanks mate. And you don't have to apologise to me about language, I'm exactly the same when these things start pissing me off! I think i should celebrate. It doesn't concern me too much and I'd do what you're doing and just keep the 1M in there anyway. Ho ricontrollato il pcb ma non ho trovato nulla... L'ho costruito uguale … The only way to diagnose the problem is to get all the IC voltages. I've checked the wiring a bunch of times and it all seems fine but I had to adapt the off board wiring for use with a battery and DC socket, this is the first time I've wired up a DPDT for non true bypasss so I may have messed up. and that pin 1 of the pots is to the left looking from the shaft side with the pins at the bottom. Wanna build this thing, with the soft clipping etc. Guitarists adored this … 12.40IC3:1. The Klon Centaur is a guitar overdrive pedal developed by Bill Finnegan between 1990 and 1994. :) I have another board and box waiting for my order of 2PDT stompers, so i'll be doing this again soon..By the way. It's supposed to go from the 9V supply to ground, but I realised I connected it to an 18V rail instead of 9V (IC2 pin 8). If you don't have a 1M resistor you can use send your name and address to guitarfx@hotmail.co.uk and I'll post you one out. But if your voltages are right in means that the circuit must be very close to being correct, so I don't think you'll have anything misplaced. The socket of D2 had a cold solder, and I used 100uF electrolitics instead of 47uF ones (same colour, size and not full atention, as the bigger electrolitics are the last ones to be populated and soldered.Wel, the effect sounds like a dream, wonderful overdrive that will get my TS808 boxed after many years of service.Just two notes:- As D1 and D2 tried OA91, 1N4148, BA282 but finally the winner was ... AA143! Good to know. The Bass pot is a simple variable resistor and so only two lugs are needed. Over at freestompboxes Greg took apart his Lovepedal Dragon Fuzz (Also known as the BBB 07, Balance, Black Beauty and so on.) Klon Centaur. This will limit the voltage to that IC to 12V when it should be getting the full 18V which will alter the response of the IC. I'm guessing it's in the area marked VB on the Sunking schematic, which seems to join half of the board together.I've checked the compoentns several times and the cuts and bridges but can't see anything wrong. Thanks for checking buddy. I would like to build, one day, this versatile boost: Fulltone Fat Boost V1. There is a 1590b layout with charge pump at tagboardeffects and other 1590b pcbs out there so you don't really need to give up the charge pump to fit it into a 1590b. My Klon is up and running and sounds great, but it seems to be a bit muddier than demos I've heard. 1.224. If you have the ring and sleeve wired in reverse, that could cause the mentioned behaviour. Both pedals are amazing. I have a 100KA for the pot atm, thats the only thing on this that is different really that the layout.. been over the components and traces, nothing different.. very odd! Caline CP-34 Pegasus Overdrive Guitar Effects Pedal. Has anyone used separate clean and gain pots? Klon Centaur Analysis. But that should not be the reason.. should it? But since the Soul Food is reasonably priced you might as well buy that one. Gating decay and harsh distortion. Looking for some help. You can but there's no point in building the original which has buffered bypass, so you may as well build the true bypass version which omits the buffer components. one by one to see if it changes. Something very new. The buffered bypass seems to be working properly.I'm going to rewired the pots and see if that resolves the issue. It's working like a volume pot. I am using a TC1044SCPA. Can something in the pot/footswitch wiring cause that gain pot acting as a volume? I checked ic voltages and they are all normal. I just got myself the kit from Bitsbox, this is obviously for the original circuit layout with considerably more electrolytic capacitors. onto the Maxon OD820 next..Cheers Ryan. Personal preference, I'd much prefer to use a film cap than an electrolytic. Sorry, I've just read the 1st post and I've got my answer..... Just Built this pedal and it worked first go. I'm pretty sure (based on the pot diagram you supplied earlier) that it is wired correctly. The madbean scheme definitely has them in opposite directions, it wouldn't make sense if they were both facing the same way. Right, and taking this in mind and an answer on Brian's forum about the Kingslayer:"IC1 pin 3 measures low because the meter creates a voltage divider with R2 and pulls the voltage down. (of course I checked the polarity of all the caps, and the ic's, and everything else you could think of before catching the obvious)Sounds sweet, time to rock and roll. Back then I was obsessed with reading about the Klon and how people would pay $1000 for the right one (this was before the KTR, just after it was reversed on FSB). All taken from this site. But in bypass the circuit is actually sucking high frequencies. Correct?As with the Maxon 820 I will use seperate 100k (or 250) pots for the dual gang.Simply hooked up 1,2,3 respectively to each pot. Copyright © 2010-14, tagboardeffects. The Klon is designed to i) push your sound further out in the mix against the contrast of the rest of the band and ii) provide a unique JFET overdrive that sounds like a ballsier Tubescreamer. Any thoughts? ARGH! 4.563. This thing sings! Yes a low voltage could stop a pedal working entirely, it could certainly affect gain. Someone please help. Please give me some suggestion as to where the problem my be.Here are the voltages:IC14.25 8.414.25 4.221.17 4.220 4.18IC24.27 14.824.21 4.144.16 4.197.94 4.13IC38.28 8.153.31 3.250 3.784.63 7.79The second is similar. Just built 2 of these. From the above there seem to be quite a few problems from folks. Checked IC's. This increases the headroom. Could this be caused by using non polarized 1u caps on this layout? Someone please help. in my opinion, no. So I started replacing ICs. 4.127. Let me know. Made one of these with the 'S', so thought I'd try one without. Any ideas? If anybody wants to take a look:https://dl.dropboxusercontent.com/u/1053764/klon.jpghttps://dl.dropboxusercontent.com/u/1053764/klon2.jpgAs after 20 hours of building these it could be something like a missing component somebody can spot in 5 seconds.Would the 100n cap next to pin3 be worth swapping? Here are a couple photos. I assumed since you put polarized caps in the original, they needed to stay polarized. Replaced the TL072's and this issue went away. Can someone tell me which way every single one of them should be oriented? For more information see https://github.com/jatinchowdhury18/KlonCentaur here's hoping... now they are:4.28 12.384.28 4.284.21 4.27-8.93 4.23looks pretty much the same as before :-sare you sure that completely removing the 100u 25v cap has no effect? Many of these have been posted on freestompboxes.org, so check that site out for great discussions on building your own effect pedals. Changed the diode as of the updated scheme, couldn't really hear any noticable diffrence so i thought that 18v might give it more headroom at highter volumes maybe.anyway, heres a demo i made of my build :)http://www.youtube.com/watch?v=Kap6bO64Epk, actually it sounds insanely good, so happy with it! is there a true bypass version of this layout? Yes, I do have the IC3 flipped with pin 1 on the bottom right. 470p in place of the 820p helped quite a bit. I'll put it through the paces with my normal guitar/amp setup and see what happens. I went back to the original 3n9 tone cap (it socketed on mine) and like it even more now. Hard clipping seems to have usually a more dynamic overall response to the guitar touch than soft clipping, although it depends on the circuit design. I need a few sockets for another project so will get some in.lvlark, if you're reading this I would really appreciate the info you offered for connecting the bass pot, when you have the time. I dont really like the klon, but I love this pedal. The OD820 already includes a charge pump and works on -9V to +9V and so already the equivalent of an effect running at 0 - 18V. If you're getting diodes shattering, you have a couple options. I accept that I've alomst certainly done something wrong but am hoping that somebody will be able to direct to right area of the board to concentrate my efforts on. I wanted one with board mounted pots and for a smaller enclosure. haha thats true abut the shoes...i measured all the resistors as they are on the board and they are all correct except the 100k's read around 68k in the circuit. Nice one matey, I like the OD820 much better than the Klon which I've never been that impressed with as an overdrive, so I'll be interested in what you think about it.

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