Desired load is below 40 Ω. Consider using a primary-side load for very low target impedances.
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The LL1638 is the industry standard HT choke for valve amplifiers, available in 8H and 10H.
If you have any questions about this product or need some help with your design please contact us.
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.
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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