A heavy-duty 3-rail power supply unit engineered specifically for DIY audio projects and 500-series racks, featuring an onboard 48 V phantom power transformer and delivering up to 3 A per rail for high-demand builds.
Technical Specifications
Output Rails: 3 independent rails (2 positive and 1 negative at 3 A each)
Voltage Regulation: High-current LM350 regulators for ± rails; TL783 or LM317 regulator for the 48 V rail
Filtering: Massive 20,000 µF super-smoothing capacitor bank (10,000 µF per ± rail)
Onboard Phantom Power: Dedicated onboard transformer specifically for the 48 V rail
Variable Voltage: ±V1 configurable from 3 V to 30 V (transformer dependent)
Terminal Block Connectors: Heavy-duty screw terminals accepting cables up to 2.5 mm²
Board Dimensions: 140 mm x 80 mm
Key Features
High Output Capacity: Easily powers a full 11-slot 500-series rack loaded with preamps and processors (using a 2x 15–18 Vac 100 VA transformer; TRIAD VPT30-3330 highly recommended for +16 V/-16 V operation)
Onboard 48 V Transformer: Features its own dedicated onboard transformer for clean, stable 48 V phantom power delivery
Massive Power Filtering: Integrated 20,000 µF capacitor bank provides ultra-clean DC voltage with exceptional ripple suppression for low-noise performance
Safety & Cabling: Includes dedicated Protective Earth (PE) and Ground (GND) connections, along with large terminal blocks supporting up to 2.5 mm² wire gauge
Available Options
PCB Only: 1x VPR + TRAFO Bare PCB
Full Kit: 1x VPR + TRAFO Bare PCB and all required electronic components including the Triad FS48-125 transformer
Product name: VPR + TRAFO Product identifier: PSU002/PCB002 Manufacturer: Link Audio Design, August-Bebel-Str.18, 08373 Remse, linkaudiodesign@gmail.com