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  1. SparkyCal

    Just When I Thought it was Going to Be Easy

    Why on earth could they not build a DC barrel that complies with pedal builds anyway?
  2. SparkyCal

    Just When I Thought it was Going to Be Easy

    Sometimes I have trouble with 2D printing. This will take a few hours to dry...so stay tuned.
  3. SparkyCal

    Just When I Thought it was Going to Be Easy

    Hmm. If the inner ring seal works, I will also have to pout a little ring of sealant around the outer surface of the box, around the ring. Otherwise, the washer will touch.
  4. SparkyCal

    Just When I Thought it was Going to Be Easy

    see attached pic. Place your bets. Will it work?
  5. SparkyCal

    Just When I Thought it was Going to Be Easy

    @VB...yeah..I just learned that the hard way ;-( The tubing helped, but it did not get me all the way there. So, I just put a little pin of Kitchen and bath caulking around the inside of the whole in the box. I will report back. P.S. I am one of the pose people who rarely throws anythign...
  6. SparkyCal

    Just When I Thought it was Going to Be Easy

    Hey Bertus- the shrink tubing fit like a glove. Not as durable as plastic, no doubt, but we'll see if it holds. this is still a prototype anyway (see attached)
  7. SparkyCal

    Just When I Thought it was Going to Be Easy

    Thanks guys. I have a ton of shrink tubing. I may try that first.
  8. SparkyCal

    Just When I Thought it was Going to Be Easy

    thanks for that. Maybe a little coat of hot glue?
  9. SparkyCal

    Just When I Thought it was Going to Be Easy

    That makes sense. Does that mean I should reverse the barrel wiring?
  10. SparkyCal

    Just When I Thought it was Going to Be Easy

  11. SparkyCal

    Just When I Thought it was Going to Be Easy

    It is on the very first post on this thread
  12. SparkyCal

    Just When I Thought it was Going to Be Easy

    I don't understand this. My dual op amp circuit is working great, up until I put it into the box. But this time, I know what the problem is. But I don't why it is happening and how to fix it. Because there is no room for a battery, my circuit uses only the DC barrel. It all works perfectly...
  13. SparkyCal

    Just When I Thought it was Going to Be Easy

    Do you think it could have affected the Pin readings?
  14. SparkyCal

    Just When I Thought it was Going to Be Easy

    Hmmm. I have an idea. I just built another circuit using the 4558D op amp. It initially did not work, until I tried the following: I noticed that I had one of the jacks, daisy chained to ground by passing it through the other jack, which went to ground. I had never done it this way, and so I...
  15. SparkyCal

    Just When I Thought it was Going to Be Easy

    @VB. You're right. As I own about a hundred of these op Amos, I would like to find out how they work. You referred to a unity gain test circuit. I have no idea what that is, but I would be very interested in building one, so I can get to the bottom of this. Is there a schematic you could direct...
  16. SparkyCal

    Just When I Thought it was Going to Be Easy

    When I first did this, it was for 2 reasons: 1. I have about 100 of these op amps. 2. I Figured, if I can now build a dual op amp pedal (thanks to you folks- especially AG, Bertus and Harald- trust me, they have been coaching me for longer than I care to admit;-)) , then it should be simple...
  17. SparkyCal

    Just When I Thought it was Going to Be Easy

    So, my eyesight needs a check. I again plugged the op amp in to the socket upside down. I threw it out and put a new one in correctly. Still does not work. Here are my new readings: Pin1. 6.68 Pin2. 1.2 and falling Pin3. 3.68 Pin4. 0 Pin5. 0 Pin6. .1.52 and falling Pin7. 8.12 Pin8. 7.28...
  18. SparkyCal

    Just When I Thought it was Going to Be Easy

    I honestly don't know how I keep screwing this up. I think you;'re right though. I'll report back once I have had a chance to give my head a shake
  19. SparkyCal

    Just When I Thought it was Going to Be Easy

    This is strange I cannot get this circuit to work with the single op amp I am using. On the op amp, the following is written: 19ALE3M TL081CP From this, I assume PIN 2 is the - IN, Pin 6 is the Out, Pin 3 is the + IN , Pin 7 is the VCC in and Pin 4 is ground. Yet, I have built this many...
  20. SparkyCal

    Just When I Thought it was Going to Be Easy

    Don't get me wrong. I appreciate the advice and prompting. When I ask for clarity, it is truly because I don't understand what is being suggested.
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