Handcrafted Precision
Each unit is wound and assembled by experienced magnetics technicians, guaranteeing exceptional quality control, tighter tolerances, and minimal inter-winding capacitance.
Handcrafted Engineering Excellence
Bespoke Transformers & Chokes for Global OEMs
Powerstax delivers precision-built custom transformers and chokes (inductors) engineered to perform under demanding thermal, electrical, and environmental constraints.
From single mains transformers to specialized low-noise isolation units and high-reliability inductors, every magnetics assembly is handcrafted in UK-certified facilities. Building upon the legacy of Drake Transformers—a trusted manufacturer with over three decades of field-tested reliability including 30+ years powering legendary audio systems such as Marshall Amplifiers—Powerstax provides OEM partners with unmatched thermal endurance, structural integrity, and electrical safety.
Whether your application demands custom low-voltage windings, high-voltage isolation barriers, or specialized chokes for power factor correction, our in-house engineering team provides complete end-to-end design, prototyping, and volume production.
Value & Performance
Why OEM Procurement Teams Trust Powerstax
Our design approach combines handcrafted artisan assembly with rigorous modern verification protocols to meet tough industrial, medical, and defence requirements.
Fully Tailor-Made Solutions
Custom mechanical mounting, bespoke voltage/current ratios, specialized insulation classes, and custom thermal management engineered precisely to your design footprint.
Rapid Prototype & Turnaround
Streamlined engineering workflows enable fast turnaround times for custom prototypes and production runs, helping you meet key project commissioning deadlines.
Certified Quality & Compliance
Manufactured in ISO 9001 certified facilities. Full compliance with UKCA and CE electrical safety standards, alongside WEEE & RoHS environmental requirements.
The Drake Engineering Legacy
Incorporate decades of proven design authority. Drake magnetics set the industry baseline for durability and acoustic neutrality across critical commercial and industrial platforms.
End-to-End Technical Support
Direct access to Powerstax magnetics design engineers for electrical calculations, thermal modeling, safety creepage planning, and pre-compliance advice.
Engineering Capability
Technical Capabilities Envelope
Standard power ratings focus on sub-1kW applications up to multi-kW bespoke magnetic assemblies designed according to exact client specifications.
| Parameter / Feature | Specification Range / Capability | Engineering Details |
|---|---|---|
| Power Rating Envelope | Sub-1W up to 1kW+ (Custom platforms higher) | Optimized core volume and copper footprint for maximum efficiency |
| Transformer Types | Mains, Isolation, Auto, Step-Up/Step-Down, Audio | Single-phase and three-phase designs handcrafted to spec |
| Choke & Inductor Range | PFC Chokes, Smoothing Inductors, Common Mode Filter Chokes | Low-loss ferrite and laminated steel core options |
| Safety & Insulation Classes | Class B (130°C), Class F (155°C), Class H (180°C) | Reinforced insulation barriers, high dielectric breakdown resistance |
| Compliance & Standards | UKCA, CE, RoHS, WEEE, ISO 9001:2015 | 100% factory safety and functional testing prior to shipment |
| Applications Served | Medical, HVAC, Isolation, Load Banks, Defence, Audio | Rigorously tested for vibration, noise, and harsh environment duty |
Global Versatility
Target Applications & Industry Sectors
Our custom transformers and chokes provide quiet, reliable power transfer across mission-critical systems globally.
Medical Isolation
Low leakage current safety isolation transformers engineered for clinical diagnostic and treatment instrumentation.
Building Automation
Rugged control transformers built for continuous duty inside commercial heating, ventilation, and air conditioning plant.
Load Banks & Machinery
High-durability step-down and matching transformers engineered to withstand industrial load surges and noise.
Legacy Drake Heritage
High-fidelity output and mains transformers designed for ultra-low distortion and optimal acoustic performance.
Ruggedized Magnetics
High-reliability components constructed to withstand thermal shock, mechanical vibration, and tight space envelopes.
Filtering & PFC Chokes
Bespoke inductors for harmonic suppression, ripple reduction, and power factor correction in switch-mode systems.
Technical FAQ
Frequently Asked Questions
Can Powerstax build exact replacements for legacy Drake Transformers?
Yes. Powerstax holds the original engineering drawings and intellectual property for Drake Transformers. We continue to manufacture genuine replacements and updated equivalents for existing systems, ensuring long-term product lifecycle support.
What information is required to get a custom transformer quote?
To provide an accurate technical quote, our engineers typically require primary/secondary voltages, operating frequency, required power (VA or W), duty cycle, mounting dimensions, insulation class, and any specific regulatory standards (e.g., medical safety or thermal limits).
Do you offer small production batches or prototype quantities?
Yes. Our flexible manufacturing setup accommodates low-volume prototype builds for engineering evaluation through to full production runs for international OEMs.
Are all transformers 100% factory tested?
Absolutely. Every handcrafted transformer undergoes rigorous Factory Acceptance Testing (FAT), including turns ratio check, winding resistance, dielectric breakdown (hi-pot), and insulation resistance testing.
Discuss Your Custom Transformer Requirements
Send our magnetics design specialists your electrical, thermal, and mechanical parameters. We will review your application specifications and deliver a custom handcrafted solution tailored to your build.