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  1. SparkyCal

    A Stretch

    I am switching gears and pursuing this circuit: https://www.diystompboxes.com/smfforum/index.php?board=33.0 Here are my reasons: 1. the explanation is very detailed. It is right down to put this pin in this hole on the breadboard. And it also explains the thinking along the way. It also shows...
  2. SparkyCal

    Op Amp assortment

    What would be good op amps to buy?
  3. SparkyCal

    Op Amp assortment

    Lesson learned. The counterfeit article Bertus posted is a real eye opener
  4. SparkyCal

    Op Amp assortment

    I don’t know what is fake and what isn’t but I do suspect that at times old inventory is dumped, or sometimes, factory seconds are sold. I have had this experience with other products on amazon. 99% of the stuff I buy, I am happy with but the odd time, there is some weird stuff. Minor example...
  5. SparkyCal

    Op Amp assortment

    I have these arriving today. Any thoughts? Robojax LM741 UA741 Operational Amplifier 8-DIP OP AMP 741 I had ordered them for another schematic I found a few weeks go
  6. SparkyCal

    Op Amp assortment

    Thanks to you both. I have been trying to learn how to use op amps. I don’t think anyone can say it is for lack of effort or good advice. ☹️ It is so simple , which makes it really difficult to understand why I can’t get it to work. I don’t give up easily and I have not given up. But...
  7. SparkyCal

    A Stretch

    Hi folks: i owe it to you to tell you that I am backing away from this project for a while. No matter how hard I try, I can't make the op amp produce distortion. Maybe I will but a different brand op amp next time I'm around the parts store. Thank-you for all of your help. I am sure it is just...
  8. SparkyCal

    A Stretch

    Sorry for my loose language- Yes, they are in parallel. I eliminated the ton control, in order to avoid further complications and because most believe it is not needed. I attached a pic of the project although I know you will not be able to use it. It is just for a visual. Here is where I am...
  9. SparkyCal

    A Stretch

    We may be onto something.The Gain pot reads A500K on it. The funny thing is, when I turn it counter or clockwise, it has no effect whatsoever. The center and right side terminals are connected together (shorted). The left terminal is connected to Pin 2 and the center/right terminal is connected...
  10. SparkyCal

    A Stretch

    since this was to be my foray into building an op amp pedal, I am happy to abandon this circuit. Does anyone know of a circuit that uses the op amp I haVe (assuming it is not the problem), that actually works? I will search as well
  11. SparkyCal

    Op Amp assortment

    I am looking to utilize Op amps to build guitar pedals (distortion, overdrive- things of that nature). I bought some through Amazon and they seem to be defective. Preferably looking for an assortment, and preferably through Amazon. Does anyone have a recommendation/link to such an assortment...
  12. SparkyCal

    A Stretch

    Sad but true- built this on. a PCB with a socket for the op amp. I am getting sound again, but noi distortion. there is a strong possibility that the op amps that i bought were defective. These are them:https://www.amazon.ca/gp/product/B06XK6VW8X/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1...
  13. SparkyCal

    The Adventure Continues......

    I hate to say it, but some of the software based amps sound better than hardware based amps.
  14. SparkyCal

    The Adventure Continues......

    Thank-you for sharing your thoughts. I strongly believe that technology, in many ways, had destroyed music. Music has become democratized. Before, you had to know how to play an instrument. Now, anyone with a laptop computer or phone for that matter, can drag around pre made beats and loops and...
  15. SparkyCal

    A Stretch

    Good to know. I can't wait to hear how this turns out once I have solid connections. I will report back.
  16. SparkyCal

    Jumper Wires and Breadboards

    Thanks for all the suggestions. Much appreciated!!!!
  17. SparkyCal

    A Stretch

    Thanks again. I watched the video last night. I think I understood half of it...which is good for me. He kind of lost me when he began talking about virtual ground, but I did get the concept that it happens during the non inverting loop. I think i now know how to create a buffer loop. It...
  18. SparkyCal

    Jumper Wires and Breadboards

    I've got a variety of jumper wires and breadboards that came in kits. Most of it is really cheap, nmade in China stuff. The ends of the jumper wires are often shredding, or otherwise falling apart. They are likely factory seconds. Does anuyone have a link to a GOOD quality breadboard and jumper...
  19. SparkyCal

    A Stretch

    Thanks for the observations. Here si where I am: Martin- i have now connected pins 6 and 7 and it has made a difference. Bertus: I would like to better understand the treatment of the second op amp, but I don't think i am there yet. Things like unity gain must be second nature yto you and...
  20. SparkyCal

    A Stretch

    Update- i noticed that i forgot to change the connection to C3 so that it gores to Pin 1. Once I did that, I could hear distortion. However, there is still too much buzz and i notice that if my hand goes close to certain components on the breadboard, the buzz gets more intense or weakens as I...
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