Or maybe a "better" opamp would be an improvement. Download HTML LM741 Datasheet (PDF) - Fairchild Semiconductor Description SINGLE OPERATIONAL AMPLIFIER LM741 Datasheet (HTML) - Fairchild Semiconductor LM741 Product details The LM741 series are general purpose operational amplifiers which feature improved performance over industry standards like the LM709. From what I gather 741s are kinda trashy sounding by nature, but maybe that's the charm of this circuit. I have mostly duals (ie 4558) available so obviously different pinout. I'm wondering if it would be worth the trouble to try different opamps. The high gain and wide range of operating voltage provide superior performance in intergrator, summing amplifier, and general feedback applications. It is intended for a wide range of analog applications. Maybe it's based on something else, I don't know. The LM741 series are general purpose operational amplifiers. I'm wondering if anybody else has messed with this circuit. I guess I could add a voltage divider before the volume pot if I want to tame the volume some on mine. I don't know how the overall volume compares to the original because that is set internally with the trimmer, and I don't want to mess with that setting since it's not my pedal. I put an 18k resistor in parallel with it to make 10k, but I ended up pulling the 18k for more fuzz range. For the fuzz control I used a 25k pot because I had it handy with wires on it already. I just copied the top part of the schematic, with a 100k pot for a volume control instead of a trimmer. So my clone works fine, and sounds pretty much like the original. Here's a not-so-great copy of the schematic:Ī slightly better. Thirdly, the common-mode input voltage range for LM741 is also very high. Secondly, this op-amp considers as the most suitable option for voltage follower circuits. Firstly, it has the capability of null- offset adjustment through two pins. I had an LM741 handy so I built a clone on the breadboard. LM741 is a general-purpose operational amplifier. Sounds really cool going into my Dynacomp. Quite different from a BMP or FF, more midrangey and can do overdrive pretty well. Well I agree that the fuzz is indeed pretty cool. Easy repair, just a loose wire, actually never soldered to the PCB at the factory back in 1991. LM741CN Operational Amplifier: Pinout, Datasheet, and Typical Application. He said the fuzz was cool, but had quit working. So I was fixing a Morley BFW Fuzz/Wah for a friend of mine.
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