how bout it Bean? this sounds like one of those effects that's either loved or hated. me, I'd be interested in building one if a PCB was available for it ;D
apparently the secret to the Corgan's siamese dream tone?
J
Actually, guitarpcb already has one, I think. Which isn't to say that I won't do one. Actually, I've never built the op-amp amp Muff before! I can take a look at it.
I too need to build one of these for an overall palate of muff. ;D
There is also lots of DIY layouts. Let me know if you interested, I believe i have more than one i can send you. Something to do until Bean gets one going!!! :)
Quote from: the3secondrule on March 13, 2011, 10:05:24 AM
apparently the secret to the Corgan's siamese dream tone?
I thought that was creamy dreamer mod??
Corgan actually never used the Creamy Dreamer. There's a really informative thread about it on DIYSB.
Just a quick note: the opamp BMP from guitarpcb.com = great pedal!
Quote from: madbean on March 13, 2011, 05:54:28 PM
Corgan actually never used the Creamy Dreamer. There's a really informative thread about it on DIYSB.
Oh cool. I'll look for it. Big muffs rule!
I had a question about opamp big muffs recently:
I saw a DIY opamp muff on youtube and it had a TON of sustain...like 15 seconds. Not sure how much of that was acoustic feedback--do opamp muffs have a bunch of sustain?
I don't know particularly, but the Muff is a very durable circuit. It's amazing to me all the variation in parts that EHX has used, all the different sources and even nations that the circuits originate from, and they STILL sound and act like a Muff. There are more variations of this than any other single pedal and they all sound somewhat similar. It's also amazing that a primarily transistor based circuit can be replicated using an IC. It's unreal.
About the Billy Corgan thing... I'm not sure, but I've heard online demos of the IC based Muff that most closely resemble the Pumpkin's albums of the early-mid 90's to me. I don't know what Corgan used, but I know that using an IC Muff you can get that 'tone.' I built a Ram's head, and I can't quite get that tone easily, but I certainly can cop some Gilmour.
Jacob
Quote from: madbean on March 13, 2011, 01:00:27 PM
Actually, guitarpcb already has one, I think. Which isn't to say that I won't do one. Actually, I've never built the op-amp amp Muff before! I can take a look at it.
Cool, thanks for the tip-off ;D
For some reason I thought their prices were much steeper, might have to give this one a blast
J
I'll probably do something for this.
I have one of these boards from guitarpcb that is waiting to be boxed up. Barry makes some quality stuff. Sometimes it might be a little higher priced than the 'bean, but he's always having sales or special offers which makes up for it. Last time I ordered I got like 3-4 boards for free!
I think my version will be a bit smaller. 2" across to fit more easily in a 1590B.
Actually...the layout is already finished :-X
Nice that was quick Bean! It would be super cool if we could add a tone bypass switch into it! I believe it's a pretty simple mod. ;D
Quote from: madbean on March 14, 2011, 04:45:52 PM
I think my version will be a bit smaller. 2" across to fit more easily in a 1590B.
Actually...the layout is already finished :-X
In that case I'll hold off on ordering from guitarpcb.
looking forward to this one ;D
I built one on vero and it has a very different muff flavor. I think it has less sustain than most other muffs actually. the key is running it into an already distorting high gain amp.
I also found you have to use the right op amps uA 741 for ic1 was neccessary to get the right sound out of it for me. I tried other subs but it didn't sound right until I put the right op amp in. I think I used a jrc4558d for ic2
I have a video of mine on youtube.
Forgive the cheese drum beats and leadup but you get the goods at 1m25s
The IC muff is my favourite for huge HUGE walls of fuzz. No other muff comes close to the sheer wall of crushing doom. Amazing pedal.
MAN thats is an epic muff sound. Definitely a huge crushing wall of doom fuzz!!! What layout did you use to build yours or is it an original one?
Quote from: bigmufffuzzwizz on March 23, 2011, 03:24:14 PM
MAN thats is an epic muff sound. Definitely a huge crushing wall of doom fuzz!!! What layout did you use to build yours or is it an original one?
It's an original from 1978. I'm guessing from the Sunn avatar that you're a volume worshipper, so I wholeheartedly recommend building one up.
In fact...
Wait a few minutes and...
Here's my pedal
http://s172.photobucket.com/albums/w20/pandadandan/op%20amp%20muff/
(http://i172.photobucket.com/albums/w20/pandadandan/op%20amp%20muff/DSCF8229.jpg)
(http://i172.photobucket.com/albums/w20/pandadandan/op%20amp%20muff/DSCF8230.jpg)
Password is "madbean"
Wow! The routing on the Pcb is so funky looking. It clearly appears to be the key of the mojo ;)
Quote from: pandadandan on March 28, 2011, 07:33:42 AM
It's an original from 1978. I'm guessing from the Sunn avatar that you're a volume worshipper, so I wholeheartedly recommend building one up.
Thats awesome. Your muff is definitely a doom beast. I do plan on building one. I have a vero layout and of course waiting for the bean board! And yes high volume!! Sometimes really high volume!!
There's some videos posted of my band on here if your interested(but i think you have to like us to see them ;D). Heavy Pyschedelic Doom Rock you know the deal :)
http://www.facebook.com/pages/Voodoo-Merchant/118460538191632#
I was meaning to ask, do you play in a band?
Got to love those gaudy old EHX boards. :D
I finally got around to finishing up my GuitarPCB board around 1:00am last night, and it sounds incredible (even at "I don't want to wake the neighbors" volume levels). This is by far the best Muff I've ever played. It may not be the one for those who have wet dreams about David Gilmour while they sleep, but for the rest of the world this may be "the one". haha.
I'm looking forward to checking out a Bean board for this one... and I've always wanted the real deal :jealous:
I got to this finally today. One more thing on my checklist of stuff to do done! I have a layout done, but I have too many projects I have to verify on my plate. I'm looking for someone who I can send a PCB file to etch, then populate and verify for me on this project. The only benefit I really can offer is that you would be the first to have access to my project file long before it's posted on the forum. You can also have my permission to use my project for money making, which I normally don't really give out. Not much I know, but that's all I really can offer.
So, if there's anyone who's dying for an Op Amp Big Muff and want's to verify my layout I've done, then please let me know and we can work it out.
Jacob
I'll do it, Jacob.
Me too!! :) I'll pay for your materials/shipping if need be
OKeefe is gonna help me with this one! Thanks guys, I'll have some others that I'll need verifying in the future, so if you're interested in it, let me know.
Jacob
OK here's the etch from last night. I drill-pressed while I was kinda sleepy but it came out ok, I think.
I'll probably start soldering components later today or tomorrow.
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Great job Keefe, I hope it turns out alright.
I noticed last night that I had something weird go on, so not all the parts may fit perfectly because the board's scale sideways may be slightly off. I'm working on fixing it today, so in the revision I produce it will be fixed, but hopefully it won't cause you any difficulties. I hope... if it does I can send you the revision.
Jacob
Thanks Jacob
I just checked, & both the IC sockets both went in with no fuss, so I would think any other component could be crammed in there if the need arises. But go ahead & mail me the revision anyway just in case.
Updated and emailed
Jacob
That's a nice looking layout Jacob! Nice Etch too haberdasher! Keep us posted! :)
Josh
Thanks Josh
Well, I'm through with most of it, but I hit a speed bump with the 120nF cap. I assumed it would be easy enough to cobble that value together with a union in either parallel or series, but I can't work it out unless I utilize a cap I'm saving for another project. I grabbed one from mammoth since I was making an order anyway, and it should be here by Thursday or Friday. Then I'll just mash in a couple of ICs and wire it up. Not necessarily in that order. :)
I think a 150nf might be fine in that spot. Don't have schem in front of me, but you do. See any reason why a 150nF wouldn't work there?
Jacob
It's a cap that is going from the tone section to ground. I'm sure 150n is fine, but I already cleaned up & I'm probably done for the night at this point. I'll definitely throw a socket in there tomorrow and finish it up with a 150n.
Coolio. Yeah, even if it doesn't 'sound' right, it will at least verify that the circuitboard works. Once we know that, we can tune it to sound great all day long.
Jacob
OK I think we're all verified here.
This took way longer than I expected because I had to rebuild my breadboard testing rig with a new 3pdt switch, and so I had to rewire the whole thing. I'm still having some crazy ground issue with my test rig that is driving me bat shit. I've been over the wiring several times and I can't figure out what the problem is. I'm literally having to play with one sock off, touching the input & output jacks with my toes to be able to hear over the hum. But anyway, that's my problem, lol.
I will say this thing sounds pretty good. Right now mine sounds a little too hi-fi because I didn't have a single channel opamp for the lm741 that isn't "too clean" sounding. I tried TL071, LF351, and NE5534 and they all sound about the same. I thought I had a TL081 around here somewhere, but no dice on that.
The only weird thing so far is the tone pot. If I turn it full treble it sounds nasal like a cocked wah. But since I'm using the wrong value cap for C9 (150n instead of 120n), it's probably as simple as that. I'll be receiving an order tomorrow with a .12uF cap in it, so we will know soon enough.
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Cool!! I'm excited to hear this.