A compact, heavy-duty 3-rail power supply unit engineered specifically for DIY audio projects and 500-series racks, offering versatile transformer wiring options and 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 regulator for the 48 V rail
Filtering: Massive 20,000 µF super-smoothing capacitor bank (10,000 µF per ± 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: 100 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 ±16V operation)
Flexible Transformer Wiring:
Single Transformer: Compatible with 3-outlet transformers (16 Vac/16 Vac/48 Vac)
Dual Transformer: Can be run with a primary dual-outlet transformer (16 Vac/16 Vac) and a separate dedicated 48 Vac transformer
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 FULL VPR Bare PCB
Full Kit: 1x FULL VPR Bare PCB and all required electronic components
Product name: FULL VPR Product identifier: PSU003/PCB003 Manufacturer: Link Audio Design, August-Bebel-Str.18, 08373 Remse, linkaudiodesign@gmail.com