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  1. SparkyCal

    I'm Back- sort of

    Not entirely related question.... I've seen some guitar stomp box circuits start with a buffer stage where they use a transistor to achieve buffering. What does buffering mean in this context? Why utilize a transistor driven buffer? This is prior to the signal proceeding to the op amp stage.
  2. SparkyCal

    I'm Back- sort of

    ok..so if I understand you correctly, I can go with the 201 gain and this will better facilitate the diodes addition and clipping. In that schematic that I am working with (which now is a mix of that schematic and yours), can I use LEDs as diodes, or does it have to be the IN4148s?
  3. SparkyCal

    I'm Back- sort of

    Hi guys....now that things are starting to show signs of working, I plan to do a build from scratch. Mainly because I slapped the current build together and it's sloppy. So....I think I;d like to take the current approach whihc means building the voltage divider and the op amp portion, and...
  4. SparkyCal

    I'm Back- sort of

    I don't know if you could hear this, but this is what it sounds like through the Orange small desktop amp. I get no sound at all if I keep the amp clean. Once I dial up some distortion, I get sound (as in the linked to audio). And I'm using a Gibson Les Paul guitar, which, on the best of days...
  5. SparkyCal

    I'm Back- sort of

    Hi AG I have attached the schematic and values. Please note the following: I have not shown the voltage divider. It is exactly built from the original schematic. So the 1M resistor that carries the haled voltage is not shown, but it is part of my circuit. I circled another component that I...
  6. SparkyCal

    I'm Back- sort of

    I installed the capacitor and the circuit works!!!!! I typically use a very small guitar amplifier for testing purposes. It is a very small Orange amp that sits on my desk. When I plugged the guitar through the circuit and played, it did not sound like I had any sound. At that point, I was...
  7. SparkyCal

    I'm Back- sort of

    Is that the 220nf capacitor?
  8. SparkyCal

    I'm Back- sort of

    I think I have a better guess. Maybe it is because I didn't see that capacitor there, and did not install it. I will do so and report back. Does this mean that I may have fried the op amp?
  9. SparkyCal

    I'm Back- sort of

    I built the circuit using the gain 2.0 version, and it does not work. I popped in the 4558D op amp, and yes, I did buffer the second op amp. Here are my PIN readings: PIN 1 8.25. (OUT) 2. 4.10. ( - IN) 3. 4.16. (+ IN) 4. 0. (GROUND) 5. 4.16...
  10. SparkyCal

    I'm Back- sort of

    Hi Harald. Thank you. Don’t worry, I wasn’t going to unless someone here said it would do something good. On another note, here is an interesting video whereby Wampler swaps out different op amps on the fly
  11. SparkyCal

    I'm Back- sort of

    Still working on this build. It's been slow because there's a few other things going on. This question occurred to me. Given that some op amps are dual, what would happen if you used both of the? In other words, what if both outs were streamed to the Out jack and the In jack let to both + Ins...
  12. SparkyCal

    I'm Back- sort of

    Thanks Bertus and AG. As mentioned, I am hoping to build a piece at a time and go from there. Given that I do want to graduate to adding pots and diodes. should I not be building the 201 gain version?
  13. SparkyCal

    I'm Back- sort of

    Also, I only have the three op amps. 4558D. 741CP and the TL082. Which would be best for this circuit? From what I gathered here and elsewhere, the 458D, although older, isn't a terrible choice.
  14. SparkyCal

    I'm Back- sort of

    Thank-you. I see resistor values are different on each drawing. Which one are you suggesting? The one where the gain is 201?
  15. SparkyCal

    I'm Back- sort of

    AudioGuru. This would simply be an excersize to see if I can get sound. Assuming I can conquer that step, I can consider adding diodes. I would like to break down the build do that it reduces errors and makes them easier to problem solve
  16. SparkyCal

    I'm Back- sort of

    Thanks Audioguru. I’m not the slightest bit impressed with the circuit this person designed and I certainly would not use it for any serious guitar work. I was more pleased that I built it and it worked. I’d like to find a circuit that only utilizes a biased op amp. No diodes for now. I...
  17. SparkyCal

    I'm Back- sort of

    Hi guys: As you know, I've completed the Cigar Box project. I've also just recently completed this project: The main reason I did it, is that I had to get some wins under my belt. It gets discouraging if you keep going at the same circuit and can't get it to work. So, I shelved the overdrive...
  18. SparkyCal

    I'm Back- sort of

    Hmmm. I think I want to stick to single power supply with biasing
  19. SparkyCal

    I'm Back- sort of

    I don't know how I missed that site. I just downloaded the software and it seems to have worked. I have not had a chance to use it yet. Thank-you!
  20. SparkyCal

    I'm Back- sort of

    Here is an example of a schematic I found in Everycircuit, but it does not specify which kind of op amp is needed. The only thing it specifies is that its gain is 100 kV/V I am wondering if any of the op amps I have can be used. Bertus- the handbook you provide on op amps, I began to read and...
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