MC1 DIY Kit – Lundahl Moving Coil Step-Up Transformer Preamp


Transformers: None
Price:
Sale price£124.00 £148.80 Inc. VAT
  • *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.

  • MC1 DIY Kit Build Guide

MC Load Calculator

MC1 Load Calculator

Optimise your moving coil cartridge loading

Results

Required Resistor (Theoretical):
N/A
MC1 Resistor:
N/A
MC1 Input Z:
N/A
Voltage Gain:
N/A
Output Voltage:
N/A

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

Unsure what exactly is going on? Read our blogs for a deep dive

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