Bias Supply

Bias Supply Active Bias Supply Module (ABS)

Benefits of Active Bias Supply Module
  • tube life is extended
  • saturation of the output transformer is avoided
  • amplifier always operates optimally
  • better bass performance
  • more dynamics
  • danger of runaway tube current when amplifier is unattended is minimized. 
  • Also since most bias voltage supply filter networks tend to be very simple single diode or half wave, there is usually a great deal of ripple in the most sensitive signal path in the amplifier – the grid! And active bias system is also an opportunity to design a bias supply with extremely low levels of ripple. This adds a sense of stillness and low-level detail not obtainable with standard bias voltage supplies. 
  • Compact 4 x 9cm. Easy to place in chassis.

ABS in real life: ABS tames runaway CAT


ImageNamePriceAdd to cart
DIYHS Active Bias Supply Module (Pair to control 4 power tubes)
USD $169.00
DIYHS Active Bias Supply Module (Single pcb to Control 2 Power Tubes)
USD $89.00