Premier Guitar Black Russian Big Muff Mod.Need confirmation!

[soupbone]

I was checking out the this article in Premier Guitar; http://www.premierguitar.com/articles/Electro_Harmonix_Russian_Big_Muff_Pi_Pedal_Mods  I noticed after i did the main mods in the article(i.e.R8,R13,R18,R19,R22,C1,C9,C12) that my Black Russian Big Muff didn't work after these mods.So,i found this awesome Big Muff page; http://www.bigmuffpage.com/Big_Muff_Pi_versions_schematics_part3.html and from the same site,the V8 Wiring Diagram; http://www.bigmuffpage.com/Big_Muff_Pi_versions_schematics_part3.html I noticed the schematic and the parts layout on the Premier Guitar Article has a lot of flaws.I looked at my pedal and the info from the Big Muff Page,and the schematic and parts layout are correct.So,what i did was look at the two differn't schematics and layouts,and compare them.I'm almost 100% i'm correct i've got it right.Just need confirmation!   The part numbers in ( ) are the premier guitar part numbers.The numbers not in ( ) are the correct value and number.Here's the parts list; (R8=10k)-->R19,(R13=10k)-->R12,(R18=22k)-->R5,(R22k=470k)-->R7,(C1=0.1uf)-->This one is actually correct.,(C9=.047uf)-->C7,(C12=0.1uf)-->C3.Look at the two schematics,and the board layouts for reference.Just need confirmation that i'm correct!Thanks!

[soupbone]

I was checking out the this article in Premier Guitar; http://www.premierguitar.com/articles/Electro_Harmonix_Russian_Big_Muff_Pi_Pedal_Mods  I noticed after i did the main mods in the article(i.e.R8,R13,R18,R19,R22,C1,C9,C12) that my Black Russian Big Muff didn't work after these mods.So,i found this awesome Big Muff page; http://www.bigmuffpage.com/Big_Muff_Pi_versions_schematics_part3.html and from the same site,the V8 Wiring Diagram; http://www.bigmuffpage.com/Big_Muff_Pi_versions_schematics_part3.html I noticed the schematic,and the parts layout on the Premier Guitar Article has a lot of flaws.I looked at my pedal and the info from the Big Muff Page,and the schematic and parts layout is correct.So,what i did was look at the two differn't schematics and layouts,and compare them.I'm almost 100% i'm correct i've got it right.Just need confirmation!   The part numbers in ( ) are the premier guitar part numbers.The numbers not in ( ) should be the correct value and number.Here's the parts list; (R8=10k)-->R19,(R13=10k)-->R12,(R18=22k)-->R5,(R22k=470k)-->R7,(C1=0.1uf)-->This one is actually correct.,(C9=.047uf)-->C7,(C12=0.1uf)-->C3.Look at the two schematics,and the board layouts for reference.Just need confirmation that i'm correct!Thanks!

I just noticed I accidentally posted the Big Muff Page Schematic twice.Here's the board layout; ( scroll towards the bottom of the page.) www.kitrae.net/music/big_muff_guts.html

[antonis]

Maybe you should use something like this as a guide for BMπ various versions..
(you can easily trace the components on the veroboard..)

[soupbone]

Maybe you should use something like this as a guide for BMπ various versions..
(you can easily trace the components on the veroboard..)

Cool!Thanks Antonis!The Premier Guitar Article has the numbers of a lot of the resistors and cap sizes wrong.I did the mods today from premier guitar after comparing them,and I had it correct!Thanks for the pic with the different versions.That comes in handy.Thanks!

[soupbone]

Maybe you should use something like this as a guide for BMπ various versions..
(you can easily trace the components on the veroboard..)

Pistones has a great big muff site too.The Triangle Big Muff Scheme parts list of the revised versions is actually version 2.There's been so many big muffs made,with little tweaks of the same circuit.The Triangle V2 is the only version that uses a 3.3k input resistor.All of the other versions use a 39k(most used),and a 33k.Not sure what that resistor does that to the sound.

[antonis]

The Triangle V2 is the only version that uses a 3.3k input resistor.All of the other versions use a 39k(most used),and a 33k.Not sure what that resistor does that to the sound.

It "restricts" the signal..

Increasing its value increases the input impedance and decreases the incoming signal (limits gain)

Coupled with the input capacitor creates a high pass filter (attenuates low frequencies)