Desired load is below 40 Ω. Consider using a primary-side load for very low target impedances.
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Order a LL1538 and recieve a free mounting PCB.
The one and only, industry standard microphone preamp input transformer. Famous for it's use in the Focusrite designs, the LL1538 is as good as it gets for professional mic preamp circuits.
The LL1538 and the LL1538XL are high performance microphone input transformers, each with a high permeability mu-metal core and two three-section coils.
In the LL1538XL the core is about 45% larger than in the LL1538, resulting in a larger level capability. In both types, primary and secondary windings are separated by electrostatic shields. The three-section winding structure of the transformers results in a very low leakage inductance and thus an excellent frequency response.Lead time
Most transformers are made to order and incur a 4-8 week winding time, we do stock some popular models in which case your order will be shipped immediately.
If you have any questions about this product or need some help with your design please contact us.
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
Moving Coil Step Up Transformers explained
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