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I have built a univibe. Here's the thing. When i plug in the power supply, i see the bulb go bright and deep in the flashing, yet about about 1 second it goes more dim, thus the univibe tone doesn't sound correct. Any ideas on power supply issues or what part of the univibe circuit controls...

Ok i changed my speed pot to a anti-log because the sweep was wrong (everything was happening in the top 10%), and now with new pot the sweep is great yet the pot change has made my bulb or the vibe effect not go so deep. lost about half the depth / throb. weird. Are the speed pots wired into...