Mike Fabulosa

I’m a wee bit out of my mind. Been blasting Diary of a Madman and Crazy Train into my skull since the early ’80s. Been finding ways to deal with Bi-Polar Disorder and ADHD all my life. The pandemic introduced new challenges. That is what lead me to start building pedals. A way to immerse myself into so many different creative activities. This is where I share my creations and the stories, successes, failures and what I have learned with others. Feel free to browse around. Let me know what I got wrong or where I might improve. Most of all I just hope you enjoy what I have created and can maybe gain some new insights.

I picked up one of Wampler’s Ratsbane pedals after seeing his youtube video about it. In the video he talks about the fact that he socketed the opamp so that people could try different opamps in the circuit.

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The OpAmps

I decided to see if there was any difference between the single opamps I had on hand. The following opamps are in this comparison:

  • TL071 - This is the opamp that came with the pedal
  • LM741 - Probably best known (at least by me) for being in the MXR distortion +
  • LM741 Tin Can - A metal can version of the LM741
  • LM308 - This is the opamp in the original Rat circuit
  • NE5534 - It worked, that’s why I tried it. I believe it is a lower noise opamp
  • OPA134 - These I believe are also supposedly of better quality and lower noise.
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Comparison Video

Updated:

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