1992 version of Sustained Plateau Bias Krell is patent (5,331,291) which includes basic sense circuits
Latest Krells use a microprocessor plus sensors for both output current and output temperature to selectively switch-in parallel lower value resistors in the bias adjustment circuit.
Google patents will allow you to get a pdf.
For my DIY Class-A amps I include a microswitch on the PCB with a mechanical push rod going to the rear panel which allows me to set two bias points by switching in a lower value parallel resistor in the bias circult. Two bias points seems to fit my listening needs, and the bias never changes during the music.
Latest Krells use a microprocessor plus sensors for both output current and output temperature to selectively switch-in parallel lower value resistors in the bias adjustment circuit.
Google patents will allow you to get a pdf.
For my DIY Class-A amps I include a microswitch on the PCB with a mechanical push rod going to the rear panel which allows me to set two bias points by switching in a lower value parallel resistor in the bias circult. Two bias points seems to fit my listening needs, and the bias never changes during the music.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.