Lightweight amplifier

摘要

Audio input tubes and power output tubes in a vacuum tube amplifier are powered and controlled by solid state controllers. The solid state controllers sample incoming audio and anticipate and apply changes and biases in grid and plate voltages before the audio signals arrive in the power output tubes. Any mains voltage is filtered, regulated and converted to a standard voltage which is converted to plural DC voltages that are applied to sensors, tube cathode heaters, grids and plates and are varied on screen grids and plates with stepped increases and autobias. The solid state components have sensors and feedback to control voltages. Sensed overvoltages fold back power to the solid state devices and heaters, screens and plates to provide uninterrupted amplification without endangering the tubes or components.

主权项

1. Apparatus comprising:
a vacuum tube amplifier having audio input, audio input preamplifier tubes connected to the audio input, audio power output amplifier tubes connected to the audio input tubes, and solid state controllers connected to the audio input, the audio input preamplifier tubes and the audio power output amplifier tubes, a mains power connector, a multistage power filter connected to the mains power connector and adapted for blocking ingress and egress noise through mains power connector, metal shielding adapted for blocking inductively-coupled ingress and egress noise, and a power supply connected to the multistage power filter.