@chingham
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There are two things I forgot to mention about this build which may be helpful to others.
- This build came about because I didnt re-measure after i applied the label, and so my holes were too close to the box walls for the AfterBlaster to fit, so I reworked my idea and added the Stage 3 instead. I guess there are 2 lessons here, 1. measure, measure and remeasure! and 2. “turn lemons into lemonade” and don’t get discouraged if something goes wrong – take a deep breath, think about it, and you will figure something out – some of the best ideas come out of overcoming problems!
- For this particular build, I had to bias the drains to 7.5v to get the gain and tone equal to my previous builds. As you can see in the photos, I used the old style through-hole J201s, whereas in my previous build, I used SMD J201s (I biased those to around 2.5v). There are 2 lessons I learned here: 1. use your ears in addition to your meter when biasing, because all parts are slightly different and 2. always buy parts from reputable sources. I got these from mouser, I believe, and luckily they were able to be biased, but I can imagine the fakes are far too out to make them sound good, so be careful!
I know that many of you are seasoned builders but hopefully this will help someone out. 🙂
Really awesome build!! I love using the TwEQ! Very elegant and clean inside as well, I really admire your builds!
Thanks everyone! I was able to reset the biases and get the pedal working, albeit not at the 5v. I think the J201 transistors i got were a little out of spec so I had to bias them a bit cold for the desired tone. @wilkie1 & @billy – thanks for the explanation on the Q3-4 source-drain relationship!
