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  1. SparkyCal

    I'm Back- sort of

    Update: My curiosity got the better of me, and so I got up and tried it with a Roland Cube amp- which is a little bigger that the desk top one Huge difference!!! It works!!! I don't know why the Orange amp was not reacting as well. Maybe the circuit within the orange amp is such that you have...
  2. SparkyCal

    I'm Back- sort of

    The good news is that this was another successful build, in the sense that I am getting sound. The same problem seems to be in play however. Not very much volume. Now, if I use the distortion dial on the amp itself and turn it up, I get lots of sound. But this is not proper as I am feeding...
  3. SparkyCal

    I'm Back- sort of

    Thanks Bertus and AG
  4. SparkyCal

    I'm Back- sort of

    I think I am second guessing myself. Please have a look at the attached schematic that I marked. I am assuming that the 10uF capacitors that I have arrows pointing downwards from, connect to ground- correct? They don't necessarily have to connect to each other, at the point that I circled...
  5. SparkyCal

    I'm Back- sort of

    Hi Harald. I will do that going forward. Thanks for the tip.
  6. SparkyCal

    I'm Back- sort of

    I will likely start the new build today. in terms of the kill switch functionality, what I was wondering about is a way to have it go on and off electronically. In other words, you hit the switch once and it begins automatically going on and off until you hit the switch again.
  7. SparkyCal

    I'm Back- sort of

    I'm not sure if I should create a new thread for this question. I am wondering if there is any way an electronic circuit can be designed to achieve the following: Below you will find a sound file of me playing a guitar chord. You will note that the sound oscillates between being on and off...
  8. SparkyCal

    I'm Back- sort of

    As requested
  9. SparkyCal

    I'm Back- sort of

    I am sorry. I mean to say, the TL082. I will post the schematic when I get a chance.
  10. SparkyCal

    I'm Back- sort of

    Since you folks have been kind enough to coach me during my struggles, I thought, at the very least, I should let you hear what it sounds like. Although these little desktop amps are small, they pack quite a punch. Have a look here and listen at 3:17 The following clip is with my desktop...
  11. SparkyCal

    I'm Back- sort of

    We are making progress. You were right. I forgot to add that same capacitor (I'm not sure why I keep missing that). Anyway, after installing it, it worked. I am getting distorted sound out of the op amp. The pin readings are below. I used a new 4558D, just in case I blew the last one. The...
  12. SparkyCal

    I'm Back- sort of

    I was excited as I was about to order 20 Texas instruments op amps from DigiKey. The prices were very good. But when I got to the payment page, it wanted to add an additional $20.00 in fees for getting it here ;-(. It's too bad. It would have been a great choice.
  13. SparkyCal

    I'm Back- sort of

    Leave it with me. I need to take a closer look when I get a chance. Will report back. Thanks!
  14. SparkyCal

    I'm Back- sort of

    I had a quick look. The Out of the first op amp (which in Pin 1), goes first to the 220K resistor which then travels to Pin 2 (the feedback loop) The Out then attaches to the 1K resistor and then to the 1Uf capacitor, that goes to ground.
  15. SparkyCal

    I'm Back- sort of

    I will have a look and report back guys. I will also check out digikeys again. I don’t know why my search did not return a result on the tl081. Yes Bertus, I am using the 4558d. I should have said that.
  16. SparkyCal

    I'm Back- sort of

    AG. I did not look at the first link, but the second one is from china. https://www.ebay.co.uk/itm/221890304544?hash=item33a9b15a20:g:OvoAAOSwuTxV~SR~#shpCntId I hear you about products from China. But I'm sure we could assume they are all bad. I have 16 guitars. My American made ones are all...
  17. SparkyCal

    I'm Back- sort of

    btw..I just received these. I forgot I ordered them as it was over a month ago. They just arrived: https://www.amazon.ca/gp/product/B08XPQHCZ2/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1 https://www.amazon.ca/gp/product/B012ACSC1O/ref=ppx_yo_dt_b_asin_image_o06_s00?ie=UTF8&psc=1
  18. SparkyCal

    I'm Back- sort of

    Thanks Bertus and AG. Bertus- yes, you did. That formula seems very clear and straightforward. Yes, my amp and may guitar both have onboard volume,e controls. I will use them until I build, this out further to include pots.
  19. SparkyCal

    I'm Back- sort of

    Also, the schematic calls for a 200K resistor. I don't have oen. I have the follwojgmn: 2 100Ks that can be installed in series a 220K a. 180K Which do you think would be best?
  20. SparkyCal

    I'm Back- sort of

    Thanks AG. So, if I plan to do the 201 gain schematic, until I install the diodes, would it help to insert a volume pot somewhere to tame the output, until such time that I am in the diodes phase? If so, where would the pot go? Thanks
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