The Universal Filament Regulator is a low-voltage regulator optimized for use in vacuum tube amplifiers. Operating the filaments and heaters using the Universal Filament Regulator will eliminate any filament-related hum.
The Universal Filament Regulator PCB supports the LM2267x-series of ICs from Texas Instruments. A summary of the circuit features is shown below. For the full circuit description, please see the Universal Filament Regulator page.
- Programmable current limit (up to 3 A for the LM22673; 5 A for LM22679).
- Output voltages from 1.285 V to well beyond 12.6 V.
- Soft start.
- Package options exist that allow for humans to solder these ICs onto a circuit board.