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#3 Sound-shaping session with the Dazatronyx Big Fuzz Console - 1994 V7C Green Russian Big Muff Edition

Big Muff Style FuzzDazatronyxFuzzSilicon Fuzz+-
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2026-GPX-Dazatronyx-BFC-V7C-Green-Russiam-Muff-700.jpg

The 1994 Green Russian Sovtek V7C variant is one of the best loved - and recognised for its additional low-end heft - typically the bassiest of the Big Muff types. That variety used mostly KT3102EM / KT3102E Soviet transistors during its initial production. Where the 2017 EHX Nano Green Russian reissues had mostly BC547C’s onboard - indeed the same ones as the Violet Ram’s Head reissues.

 

The 2N5088 and 2N5089 are pretty solid alternatives for the BC547B and BC547C varieties - while they all do something a little different in the Bass department - progressively delivering a tighter and more modern voicing. Initially I liked the B547C’s best - the 2N5088 gets tighter, and the 2N5089 tighter still with more of a modern high-gain edge. I thought I should try all the different Transistors then - just for the sake of it - as I had already tried out 4 of the varieties. And when I landed on the BC337-25 it was kind of magical for me - a more vintage slightly more elastic / saggy feel - and with a more vintage style of low-end - slightly looser - but still punchy and elastic. While the 547’s and 5088/9’s sound a lot tighter and more modern - each one of those sounds slightly different. While my favourite sounding one was the BC337-25 - which is rarely identified with the Green Russian sound - but for me it undeniably delivers the best version of that low-end heft!

 

As beforec- I used a variety of reference sources - including Kit Rae - to reference the original Capacitor and Resistor values - and then I A/B/C’d al those 30 switches individually by ear - until I was satisfied that I had the best sound for that variety.

 

So my absolute favourite sounds came from the more vintage sounding BC337-25’s, followed by the BC547C’s - which are probably more correct and deliver a more modern and taught low-end response. If you want to tighten the low-end up further - try the 2N5089’s!

 

So another fun exercise for me - the most elaborate one to date, but also one of the most satisfying. All 3 of my sound-shaping settings thus far deliver very different voicings - even though I mostly gravitate to a similar EQ profile.

 

The next exercise will be to check out the EQD Hoof / Loe Sounds She Fuzz variants - which start off as Green Russian Muffs, but then swap in Germanium Transistors on Q2 and Q3 slots.

 

Both the Hoof Fuzz and She Fuzz use 2N3904 Silicon on Q1 & Q4, with Germanium 2N1308’s on Q2 & Q3.

 

So I will be loading my 2N1308’s into the Socketed Slots (I need to cut them down to size first as they have considerably longer legs) - so that I can try out my own variant of Germanium Muff! Thorpy tells me he once made an experimental Fallout Cloud with just Germanium Transistors - so I will trying that kind of thing also as a part B to my #4 Sound-shaping session.

 

Following that exercise I will take a hiatus on these sound-shaping sessions for a month or two - before checking out further varieties again at a later stage this year.

 

I’ve very much enjoyed the process so far.

 

The full settings are below - with the original recommended references [in partentheses]!


V7C Green Russian Big Muff Settings Profile - to my preferences!

2026-GPX-Dazatronyx-BFC-V7C-Green-Russiam-Muff-700.jpg

STAGE 1 / Q4 [ref value in parenthesis]

  • Trans : BC337-25 / BC547C
  • Col 1 R13 : 10K [10K]
  • Em 1 R22 : 100Ω [100Ω]
  • HPF 1 C1 : 220n [1μ]
  • Mil 1 C10 : 470p [470p]
  • Bias 1 R9 : 330K [470K]
  • Imp 1 R2 : 27K [39K]

SUSTAIN | BRIGHT | BUFFER IN

  • Sustain @ 3 o'c
  • Bright sweep (mod) : 1000p
  • Buffer In : On

STAGE 2 / Q3

  • Trans : BC337-25 / BC547C
  • Col 2 R18 : 12K [10K]
  • EM 2 R21 : 390Ω [820Ω]
  • HPF 2 C4 : 100n [100n]
  • Mil 2 C12 : 560p [470p]
  • Bias 2 R17 : 390K [470K]
  • Imp 2 R19 : 10K [10K]

CLIP

  • Clip 1 C6 : No Clip
  • Clip 2 C7 : 47n [1μ]

STAGE 3 Q2

  • Trans : BC337-25 / BC547C
  • Col 3 R11 : 15K [10K]
  • Em 3 R10 : 100Ω [150Ω]
  • HPF 3 C5 : 1μ [100n]
  • Mil 3 C11 : 560p [470p]
  • Bias 3 R15 : 390K [470K]
  • Imp 3 R12 : 7K5 [10K]

TONE + VOLUME

  • Scoop R5 : 39K [22K]
  • TS HPF C9 : 3n3 [4NF / 3.9N]
  • TS LPF R8 : 50K [39K]
  • Tone : @ 3 o'c
  • HPF 4 C13 : 100n [100n]
  • TS LPF C8 : 4n7 [10n]
  • VOLUME : @ Max

STAGE 4 / Q1

  • Trans : BC337-25 / BC547C
  • Col 4 R6 : 15K [390K / 470K]
  • Em 4 R4 : 2K2 [3.3K]
  • LPF 6 C2 : 470n [100n]
  • HPF 5 C3 : 47n [100n]
  • Bias 4 R7 : 330K [10K]
  • Buffer Out : On

The Insides!

2026-GPX-Dazatronyx-BFC-Muff-Insides-2-700.jpg

Original Master Visual

2026-GPX-Dazatronyx-Big-Fuzz-Console-Main-700.jpg

Sound Samples

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Stefan Karlsson
Posted by Stefan Karlsson
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