- Welcome to madbeanpedals::forum.
Recent posts
#51
General Questions / Re: Pork Barrel - Fraudhacker ...
Last post by jessenator - April 08, 2026, 03:08:19 AMGroovy. I'll double check the datasheet to be extra care, but I'll give er a go.
#52
General Questions / Re: Pork Barrel - Fraudhacker ...
Last post by madbean - April 08, 2026, 01:55:10 AMQuote from: jessenator on April 07, 2026, 04:01:13 PMSo it's safe to say that almost every BBD-based modulation effect is my 'nemesis circuit' NO matter how meticulous I've been in builds, or how much I've tried cramming related analog circuit engineering into my skull.
I've been reading about BF-2 substitutions, and if I read Mark's comments correctly, one can drop-in a xx3204, but that if the clock is running at the same rate you treat it as if you have half the stages of the xx3207. This results in a tighter effect for flangers especially.
My question is if this can be done for chorus effects, or if it would just be terrible sounding?
As long as it's pin and voltage compatible there's no harm in trying. At worst, it might be more boxy or metallic sounding than a typical bbd chorus.
#53
General Questions / Pork Barrel - Fraudhacker & BB...
Last post by jessenator - April 07, 2026, 04:01:13 PMSo it's safe to say that almost every BBD-based modulation effect is my 'nemesis circuit' NO matter how meticulous I've been in builds, or how much I've tried cramming related analog circuit engineering into my skull.
I've been reading about BF-2 substitutions, and if I read Mark's comments correctly, one can drop-in a xx3204, but that if the clock is running at the same rate you treat it as if you have half the stages of the xx3207. This results in a tighter effect for flangers especially.
My question is if this can be done for chorus effects, or if it would just be terrible sounding?
I've been reading about BF-2 substitutions, and if I read Mark's comments correctly, one can drop-in a xx3204, but that if the clock is running at the same rate you treat it as if you have half the stages of the xx3207. This results in a tighter effect for flangers especially.
My question is if this can be done for chorus effects, or if it would just be terrible sounding?
#54
Tech Help - Projects Page / SOLVED Epipen - Below Unity Vo...
Last post by Jobu - April 06, 2026, 02:09:00 AMHi there, with the "more" switch off is it expected behavior for the Epipen to be below unity volume (Pre set 100% up and Post 100%)? Biasing does not seem to make much of a difference in volume. Currently biased at 7V similar to the build documents.
If that behavior doesn't suggest a builder error I'm thinking about swapping the 10kA output pot for 100kA and testing different JFETs, other suggestions welcome.
Edit - reselecting Q1 worked to get unity volume, although biasing still has no audible effect. I went with 2n5484 Vgs off measured -1.41V
If that behavior doesn't suggest a builder error I'm thinking about swapping the 10kA output pot for 100kA and testing different JFETs, other suggestions welcome.
Edit - reselecting Q1 worked to get unity volume, although biasing still has no audible effect. I went with 2n5484 Vgs off measured -1.41V
#55
General Questions / Low rider vs Pearl OC-07 ocatv...
Last post by garfo - March 30, 2026, 04:49:43 PMI have made an older version of the Low Rider and compared the Octave Down vs the Octave down on my original Pearl OC-07.
They do not sound the same and it's killing me.
The Pearl has an hollowness and gritiness to the sound that the Low Rider does not have. The original Pearl has this kind of synthy quality to it while the Low Rider is cleaner and fater (it doesn't sound bad, but it doesn't sound as good).
I used an MC14013 for the Flip Flop and an LM2902 for the Driver of the Flip flop (the original uses these two).
I have tried three different diodes, one OA91 (germ), D9E(germ) and a Bat46. They all seem to offer something different to the sound (hard to say exactly what) but with none of them I get any closer to the sound of the Pearl Octaver. The Low rider sounds a bit bassier and it's deinitely cleaner (less artifacts).
Any tips on why I am not getting similar results to the original? How important is the germanium diode to the sound? Is it the diode or is it something else that I am missing?
They do not sound the same and it's killing me.
The Pearl has an hollowness and gritiness to the sound that the Low Rider does not have. The original Pearl has this kind of synthy quality to it while the Low Rider is cleaner and fater (it doesn't sound bad, but it doesn't sound as good).
I used an MC14013 for the Flip Flop and an LM2902 for the Driver of the Flip flop (the original uses these two).
I have tried three different diodes, one OA91 (germ), D9E(germ) and a Bat46. They all seem to offer something different to the sound (hard to say exactly what) but with none of them I get any closer to the sound of the Pearl Octaver. The Low rider sounds a bit bassier and it's deinitely cleaner (less artifacts).
Any tips on why I am not getting similar results to the original? How important is the germanium diode to the sound? Is it the diode or is it something else that I am missing?
#56
Open Discussion / Re: Big Bottoms Availablitiy
Last post by jessenator - March 29, 2026, 11:41:36 PMworking on my end 
You cannot view this attachment.
You cannot view this attachment.
#57
Open Discussion / Re: Big Bottoms Availablitiy
Last post by madbean - March 29, 2026, 11:04:17 PMNot sure what's happening there. It adds to cart fine on my end. Can anyone else check and see if they have the same issue? If so, let me know which browser (thanks in advance).
I'll PM you johnk.
I'll PM you johnk.
#58
Global Annoucements / Re: Jan 2026 restocks
Last post by jwin615 - March 29, 2026, 09:14:59 PMQuote from: johnk on March 29, 2026, 06:18:02 AMwhen will the Big Bottoms be back in stock? it's been months now.Any March now...
#59
Global Annoucements / Re: Jan 2026 restocks
Last post by johnk - March 29, 2026, 06:18:02 AMwhen will the Big Bottoms be back in stock? it's been months now.
#60
Open Discussion / Big Bottoms Availablitiy
Last post by johnk - March 29, 2026, 05:56:24 AMjust wondering when the Big Bottoms PCB will be avialable for order. I've been checking for it for months now and when i add it to cart to pay for it, it says "not available"