DC-DC 12V 24V to DC 200-450V 220V 380V High Voltage Boost Converter Step Up NEW | eBay
Amazon.com: High Voltage DC-DC Boost Converter 12V to 150V-420V 170V 230V 1.25V-12V 6.3V Filament Adjustable Step Up Power Supply 2-Way PSU DC Regulator Module for Tube Preamp/Nixie Tube : Electronics