Friday 21 January 2022

Electronic Audio Experiments Mu Blaster

 This was a request. Schematic and a neat circuit description is avaiable HERE.




3 comments:

  1. I gave this one a shot with no luck. Tried multiple Jfets, 1054 IC's, knifed the gaps and triple checked component placement. When poking around I can hear the tone control and volume working. I haven't compared it to the schematic yet.

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  2. Noticed a few things. Rather than list them, I made myself a little graphic on what needed to change (let me know if anything is unclear): https://drive.google.com/file/d/1xBtdw_fbnAQHR_20czdiJu3kCs9KrtYF

    Seems to be working now, however, the Boost isn't really saturating at all and the Depth knob sucks a LOT of the volume when it's turned down (CCW). This is the demo vid I'm referencing for how it should react: https://www.youtube.com/watch?v=00RWvRd7dQ8

    I don't see any other errors on the layout, so I dunno, maybe I screwed up my build somehow? I'll keep troubleshooting.

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    Replies
    1. Quick correction: after playing around with it some more, I noticed that the volume drop in the depth control is occurring at around 12 o'clock. When it's at either extreme, it sounds fine. I'm guessing that having roughly 500k resistance from both the 1nF and 100nF signal paths is the culprit? But it's definitely not behaving that way in the demo vid.

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