I have done this one with a RC4558NB and a TL071 on IC2. Amazing sound. Which way would the op amps orient? Hi -sorted. Is it normal that the high notes sound a little bit 'gated' and less clear/more silent? Produced and sold in tandem with the V4 Op-Amp predecessor, the fifth rendition of the Big Muff series featured the same op-amp circuitry as the fourth with the addition of a tone bypass. The V5 op-amp Big Muff was commonly assumed to be the first one with the Tone Bypass feature, but Howard Davis, Manager of Analog Circuit Design for E-H from 1976-1981, has stated the tone bypass feature was already in use before his design work on the op-amp version. hello. You can easily get 3 in if you're using the common blue 1/4 watt MF25 metal film. I verified component placement, and only made part swaps where it was within the uncertainty of the resistor (i.e. used a 1K R instead of a 1.2K R). Still loving modded stuff more than original muffs :). All original except the footswitch and the power connector. pedal works only when Sustain pot on max. you can play with different values and see what you want to do. Well I still have the gated sound, I thing because this model has a lot of gain so I turn down de gain knob about 1 o'clock with my amp a little bit crunchy. Many of these have been posted on freestompboxes.org, so check that site out for great discussions on building your own effect pedals. Thanks. Fingers crossed. When changing the switch back to the original position, the problem persists, you can hardly hear it. You should have similar recessed dent on your opamps.+m. Is it possible to sub a 1N5818 at D7 for the 1N5817 without issue? Thanks for noticing. The Big Muff part of the circuit seems to be based on the "standard" V1 schematic shown above, but the mods make it sound very different. I don't have one right now and am not sure if the 100n or 150n would be a better substitute.. Thanks, that was what I thought. where can be a problem? It is not on the schematic. I know on the Russian you replace the C1 with a 22nf and change the R2 with a 22k and resistor in series. I'll fix it once i'm back home.+m, The blue dots indicate double links. The IC based Big Muffs like the V4 and V5 op-amp Muffs, the two Deluxe Big Muff op-amp versions, and the Little Big Muff op-amp version, are not really based on the Big Muff circuit, but they do have have similar clipped/scooped mids tones as the V3 Big Muffs, though perhaps less organic. Very good option and adds a lot of versatility.+m, please could somebody send me a picture of the circuit in how it is made n what parts r required a total newbee on the circuit building, You should probably try out something a bit smaller and simpler to begin with. it works. How would be able to add a mid control on this? I've just built it and it sounds great, BUT, the tone control doesn't work and when I change the spdt switch position, the sound almost disappear. I verified my jumpers and cuts were correctly placed and working by a continuity meter. I think I never made something that uses them, so I wanted to be sure! I have ordered more diodes and chips to try them out but mine sounds like a wet fart, did you manage to find what was wrong? But it does leave me with a couple of questions... How the hell have people managed to make this pedal with the 1M in place? The pinouts do not match.+m, This is probably the best muff version I've played so far. I'm glad you did this, I really don't like my earlier layouts at all and wanted to redo them anyway. Based on your location, we've changed your settings: Follow this product to see new listings in your feed! Be careful not to drill away the copper trace completely though. I assume just a jumper in place of the switch, but would it be between rows 3 and 9 or rows 9 and 11? Your purchases help youth music programs get the gear they need to make music. Then got worse as I tried to fix it, the symptoms were similar to what others described above, my guess is that their pedals hadn't gotten to the squealing stage and like me had other issues to fix first :)Any way I hope my tears, sweat and pain helps someone else out (including the the people who posted a long time ago). I also used greenie caps as they were what I had on hand. I put a buffer in front of him and works great too.photos: https://www.flickr.com/photos/77206179@N02/sets/72157648864378317/Anyone else have this sag-velcro sound? i personally built mine as the layout is and it's perfect. I have to take the tiniest drill bit that I own, that is only slightly larger than the diameter of the hole, and drill out the opening just a tad. So for example, rows 2,7,9 and 15 are all linked. Powered by, 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. Forgive my ignorance, but can I use two of the u741s instead if two different op amps? 150n will be just fine.For Svein and zosotone - haven't seen this behaviour with mine.. Are your diodes ok? one thing to keep in mind though that this is a feedback resistor. Definitely.+m. By clicking Subscribe, I agree to the processing of my data in order to receive emails. When the effect is engaged, it runs through a variety of noises from it has no fuzz or it sounds faint and distant, or every once in a while, it will roar through as normal or it will sound as if it is in bypass (clean signal going through). But I can't find a stock IC schematic to compare. Awesome Inc. theme. completely cleaned. As far as I can tell it's not supposed to be there. Usually people use the gain knob at max. The original rubber feet have once been removed to install it on an effect board. 741 is a single opamp and 4558 is a dual opamp. Ive built 3 of these and the last one seems to have the same issue, very gated, have to hit the strings hard to get any volume. I have an RC4558IP and UA741CP. I triple checked for shorts across the vero board strips and I do not see any. Any ideas what may be causing this? the first 2 worked fine. I had it first build with the tone switch, but no sound came trough with the tone bypassed. Thanks for all your job... Is it possible to replace the u741 uc with a LM1458? from the schematics i looked at you are correct. Other alternatives are the OpAmp Big Muff reissues released in 2017 by E=H, and the vintage V5 Big Muff and Deluxe Big Muff, both of which use nearly the same op-amp circuit as the V4. i think it's much, much better. With a boost in front (SD1) the higher notes are a lot clearer, so maybe a gain stage problem? The 1M resistor is against pop ups sounds when you press the footswitch. Enjoy the builds and please also visit us on Facebook and Twitter. Would really appreciate it. I changed the ceramic to a 15pf and the volume to a 100k but was wondering what a better sub would be in this case.. Or order one, That cat is from tone 1 to ground and it's a part of the tone stack. Thanks! No you can't. I also put a trimmer from 9v to the circuit and I have a more compressed sound. It gives you 6-9dB boost and the mids come out a lot better while still keeping the fat muffesque buzz in tact. In October 2003, Dan Coggins (formerly of Lovetone) released his first commercial pedal under the Dinosaural brand, called the Tube Bender.... Not all these layouts are verified and some are put together from unverified schematics.

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