NSFW Muffinator and NSFM(usic) EAE Beholder

pingpongcomputer

Well-known member
The Muffinator build went great, violet ram's head specs with Fairchild SE4010's and a tone bypass outlined by @Feral Feline here. Straightforward build, the guide for the tone bypass was great, all I did was lower the value of the bypass resistor to give a volume boost with the tone bypass, which I now wish I had done as a footswitch instead of toggle, I plan to go back and change that to act as a tone bypass/boost. The tone stack components aren't difficult to mount directly to the pot and fit under the board. Tons of gain from the 4010's, sounds amazing blasting my Matamp. It stacks ok with some other gain pedals and not so much with others, I'm pretty new to pedal stuff so probably user error where it doesn't work well. With both clipping diodes flipped to GE there's a nice octave up overtone to the fuzz. I used NOS ITT 1n34a's from this ebay seller, $2 a pop but all the GE diodes are getting expensive, so I grabbed a handful for special projects. My new favorite fuzz, but also my newest fuzz and those usually go hand in hand, ymmv. My only gripe is the UV print has horizontal lines running through, I did CMYK but maybe I picked colors the printer didn't like? Stable diffusion as always for graphics generation, then laid out in Illustrator. I didn't pay for paint masking but Tayda did it anyway, which was a nice accident.
YCkuNVP.jpeg

Here's the messy guts:
bejeANS.jpeg


The EAE Beholder build was fun, pretty straight forward again. I followed the build doc's outline for a clean blend pot and socketed the fuzz transistors but ended up liking the stock 2n2222a best. I had to flip the belton brick and smash it in next to the footswitches in order to fit the clean blend pot where I wanted it, but it worked out. The only tweak I might do is to go back and try GE clipping diodes to see if I can get that octave overtone. I wish I'd socketed the diodes to experiment, but I can pull out the cheapo Tayda 1n4148's without crying over the cost. The Beholder in stock form really is a noise machine, but with the clean blend it makes a really nice reverb for heavy stoner/doomy stuff. I'm still figuring out the interaction of all the controls, but I've gotten useable sound out of it already and had some fun in full wet mode reliving my 20's as a horrible noise maker. Back then I did everything with a bass, a laptop, a Rat, and a Space Echo, really wish I'd kept the RE-201 but I was always broke and bills had to be paid, many records and music gears were sacrificed. It's much more fun playing with a guitar and a bunch of DIY pedals in my "office" than it was playing for a crowd of 12 like-minded nerds in a basement/bar anyway. If you like Belton brick reverb and noisy heavy stuff I tihnk it's a worthwhile build. I decided to do a chaotic/abstract DnD Beholder for the graphics in SD and I'm pretty happy with the way it turned out.
6iKeRIv.jpeg

DPw4E2D.jpeg
 
Cool builds!


So happy the bypass worked out for you; and I'll be beholden to you when I follow suit and add a clean-blend to a Beholder PCB.


I looked at the pics first and didn't even notice the horizontal lines until I finished reading your build report. ;)
 
The horizontal lines are always just a small drawback of uv printing in my experience. Any large areas will have them, even if it’s one of the pure pigment colors— Cyan, Magenta, Yellow, Black, or White.
 
The Muffinator build went great, violet ram's head specs with Fairchild SE4010's and a tone bypass outlined by @Feral Feline here. Straightforward build, the guide for the tone bypass was great, all I did was lower the value of the bypass resistor to give a volume boost with the tone bypass, which I now wish I had done as a footswitch instead of toggle, I plan to go back and change that to act as a tone bypass/boost. The tone stack components aren't difficult to mount directly to the pot and fit under the board. Tons of gain from the 4010's, sounds amazing blasting my Matamp. It stacks ok with some other gain pedals and not so much with others, I'm pretty new to pedal stuff so probably user error where it doesn't work well. With both clipping diodes flipped to GE there's a nice octave up overtone to the fuzz. I used NOS ITT 1n34a's from this ebay seller, $2 a pop but all the GE diodes are getting expensive, so I grabbed a handful for special projects. My new favorite fuzz, but also my newest fuzz and those usually go hand in hand, ymmv. My only gripe is the UV print has horizontal lines running through, I did CMYK but maybe I picked colors the printer didn't like? Stable diffusion as always for graphics generation, then laid out in Illustrator. I didn't pay for paint masking but Tayda did it anyway, which was a nice accident.
YCkuNVP.jpeg

Here's the messy guts:
bejeANS.jpeg


The EAE Beholder build was fun, pretty straight forward again. I followed the build doc's outline for a clean blend pot and socketed the fuzz transistors but ended up liking the stock 2n2222a best. I had to flip the belton brick and smash it in next to the footswitches in order to fit the clean blend pot where I wanted it, but it worked out. The only tweak I might do is to go back and try GE clipping diodes to see if I can get that octave overtone. I wish I'd socketed the diodes to experiment, but I can pull out the cheapo Tayda 1n4148's without crying over the cost. The Beholder in stock form really is a noise machine, but with the clean blend it makes a really nice reverb for heavy stoner/doomy stuff. I'm still figuring out the interaction of all the controls, but I've gotten useable sound out of it already and had some fun in full wet mode reliving my 20's as a horrible noise maker. Back then I did everything with a bass, a laptop, a Rat, and a Space Echo, really wish I'd kept the RE-201 but I was always broke and bills had to be paid, many records and music gears were sacrificed. It's much more fun playing with a guitar and a bunch of DIY pedals in my "office" than it was playing for a crowd of 12 like-minded nerds in a basement/bar anyway. If you like Belton brick reverb and noisy heavy stuff I tihnk it's a worthwhile build. I decided to do a chaotic/abstract DnD Beholder for the graphics in SD and I'm pretty happy with the way it turned out.
6iKeRIv.jpeg

DPw4E2D.jpeg
I’m trying to build this board right now and can’t find any diagrams or build lists for the switchable diodes. What diodes did you end up using in 5,6,7,&8? And what switches are they? Any help is appreciated.
 
I’m trying to build this board right now and can’t find any diagrams or build lists for the switchable diodes. What diodes did you end up using in 5,6,7,&8? And what switches are they? Any help is appreciated.
I used 1N34A's for the D6-8, but you can use any diode you like. The spot is meant for a germanium diode, but if you don't have any or want to pay inflated prices or wait for one from Eastern Europe, a schottky diode like a BAT41 will make a reasonable substitute.
The muff circuit has two clipping stages, there's a cool analysis on ElectroSmash. Each switch lets you toggle between silicon and germanium(or whatever you chose) diodes for that clipping stage. With the toggle up the germanium clipping diodes are active, toggle down is silicon.
Hope that helps, it's a fun pedal.
 
Nice job! They look great.

I'm curious about the Beholder---all the demos I've heard sound gnarly (which isn't bad), but can you tame it and get a more conventional reverb out of it too (ie, dial out the fuzz if you want)?
 
Thanks, it's possible to get a clean reverb with the clean blend mod, but it also really limits the wet mix of the reverb. The other option is to roll back the guitar volume, or otherwise limit the input signal to the beholder and turn down the fuzz control, then you can also get a clean belton brick style reverb, but it wouldn't be my go-to for that. The fuzz is generated by a FF type circuit, so with a clean reverb sound there's plenty of noticeable hiss. Since it's primarily intended as a noise machine it's not noticeable with the fuzz blasting and reverb feeding back, which is it's real strength. Paired with some delay, it's my favorite pedal to play around with for some acid drenched Japanese noise-psych inspired jams.
 
Thanks, it's possible to get a clean reverb with the clean blend mod, but it also really limits the wet mix of the reverb. The other option is to roll back the guitar volume, or otherwise limit the input signal to the beholder and turn down the fuzz control, then you can also get a clean belton brick style reverb, but it wouldn't be my go-to for that. The fuzz is generated by a FF type circuit, so with a clean reverb sound there's plenty of noticeable hiss. Since it's primarily intended as a noise machine it's not noticeable with the fuzz blasting and reverb feeding back, which is it's real strength. Paired with some delay, it's my favorite pedal to play around with for some acid drenched Japanese noise-psych inspired jams.
That's very good to know, thanks! Been curious about this as an alternative to the DBA Reverberation Machine, but have to be cautious with my limited stock of precious Belton Bricks. Ha
 
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