This kit is based on the EA(Electronics Austrailia) Tremolo. It's a great vintage sounding trem like you would you set the volume level. The amplitude modulation is done with transistors, so unlike most opto-coupler based trems, you don't get an "on/off" sound on slower speed settings and there is much less current draw. It's also a lot easier to build. And the LED status light blinks in time with the speed.
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