The Bard’s bias modulating tube circuit provides classic, warm sine wave tremolo tones. The single Tungsol 12ax7 runs at high voltage for a full, rich and dynamic tube sound. The 9VDC power supply (provided) is converted to both 6.3VDC for the tube heaters and 275VDC for the tube plates.
Demo by Simon Jarrett (EN)
Demo by Tri Pedal Reviews (EN)