LYNICESHOP Power Converter, 250W 300B Tube Amplifier Power Transformer, Primary Voltage 110V/Secondary Voltage 320V-0-320V, with Stabilizer Circuit Breaker Protection, US Standard, Universal
Vacuum tube preamplifier, digital filter aroma, DC 5.5*2.1 socket and 12V AC transformer for 6J1 vacuum electron tube valve preamp board headphone amplifier parts: Amazon.de: Electronics & Photo