Monday, 22 July 2019

Borisov Formanta Fuzz

A really good sounding fuzz found in old soviet Borisov Formanta guitars. Added a pre gain control in front and a cap blend for the body control in the tonestack. I also tweaked collector resistor of connecting Q2 to 8,2k. Sounds loud, gnarly and heavy.
Original has KT315B transistors but 2N2222A, 2N3904 and BC107 works really good in there too, just mind the pinout.



5 comments:

  1. this rare man!
    cool to share schematic? im not good at trace
    want this on perf, 1590a size 🎸

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    Replies
    1. Sure! Here is a link to schematic.
      http://cheesyguitars.com/borisov_schem/Borisov_Formanta_schematics_lb.jpg

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  2. I built this with low-gain KT315a transistors and it is RAD. Not super high-gain, but raw and dirty. Gnarly is certainly the word. An excellent biker metal fuzz.

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    Replies
    1. Very cool! Just saw your demo on Insta, sounds great!

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