ON6MU: 12 ampere, 20 or 30 amps homemade power supply (bdx33 2n3055)
12V Power Supply - 30A
12 Volt 30 Amp Power Supply | diyAudio
13.8V, 40A Switching Power Supply
A Complete 13.8 Volt, 50 Amp Power Supply | The Hobby-Machinist
Amazon.com: JOYLIT 12V Power Supply 30A 360W, Universal Regulated Switching Transformer AC 110V/220V to DC 12 Volt 30Amp Adapter for LED Strip Lights, 3D Printer, CCTV Camera, Radio Project : Electronics
Modifying a Chinese power supply to provide a variable voltage
Amazon.com: 12V DC Power Supply 30A AC 96V-240V Converter Adapter Universal Regulated Switching Power Supply 12Volt 360W LED Power Supply for LED Strip,CCTV, Radio, Computer Project (12V 30A 360W) : Electronics