Desired load is below 40 Ω. Consider using a primary-side load for very low target impedances.
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*Shipping June 2026*
The MC1 DIY kit is a complete parts pack to build your own step-up transformer preamp for moving coil (MC) cartridges. Used between your turntable and a standard MM phono input, a properly designed SUT increases signal voltage passively while preserving the low-noise, dynamic character that makes transformer coupling so compelling.
This kit follows the same design intent as our assembled MC1 units - robust mechanical grounding, reliable switching, and a layout that’s built for consistent real-world results.
What's included
- Aluminium enclosure with black front panel
- Gold-plated PCB
- Gold-plated RCA connectors
- High-quality switches
- Grounding lug / hardware
- Resistors and capacitors required for the circuit
- Mounting hardware and essential build items required to complete assembly
- Transformers, if purchased together
This kit is compatible with all Lundahl moving coil step-up transformers.
Skill level
This is a straightforward DIY build, but it is not a “first soldering project.” We recommend prior soldering experience, as the parts are high quality and can be damaged by excess heat or poor technique.
Tools you'll need
- Soldering iron (temperature controlled recommended)
- Good quality solder
- Small hand tools (flush cutters, pliers, screwdriver)
Note on responsibility
This is a DIY kit. Assembly, testing, and safe operation are the builder’s responsibility. If you are not confident with soldering and basic electronics handling, consider an assembled unit instead.
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MC1 Load Calculator
Optimise your moving coil cartridge loading
Results
Instructions
- Select your transformer model and step-up ratio
- Enter your phono input impedance (default is 47kΩ)
- Enter the desired load impedance for your cartridge
- Optionally enter cartridge specs for gain predictions
- Click Calculate for loading recommendations
Notes:
- When the desired load is below 40 Ω, you’ll see an advisory suggesting a primary-side load. Calculations still run normally.
- "No resistor required" - Phono input already provides suitable load.
- Cartridge output is based on 5cm/s, if your cartridge differs you will need to scale the value.
Moving Coil Step Up Transformers explained
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