viva Analog “Uni-Trem” (c) 2005 // 2011

The revival and update of an original 2005 circuit, the viva Analog “Uni-Trem” is one part opto-controlled Univibe oscillator (stable 2008 version) and one part jFET emulation of the Fender Vibro-Champ tremolo topology. Providing classic sine-wave Tremolo (extending into chop territory) along with the response of a class-A signal path. Two LED’s for Depth and Speed status indication : Green “on” / Red “off”

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2 comments on “viva Analog “Uni-Trem” (c) 2005 // 2011
  1. LexTaylor says:

    Hi, do you have a PDF manual for the Unitrem pedal?

    What is the proper power supply for the Unitrem?

  2. jcm says:

    HI LEX, SORRY NO MANUAL … THE CIRCUIT IS MEANT TO RUN ON STD BOSS PSA-120T 9.6vdc POWER ADAPTER … IT IS BASICALLY A UNIVIBE OSCILLATOR GOING INTO A JFET/BIPOLAR GAIN-MIXER STAGE ANALOGOUS TO THE FENDER (VIBRO-CHAMP) VERSION DONE WITH TUBES

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