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LTspice simulation file for the Mains Hum Notch Filter
This download is the simulation file shown in the February 2026 article on the Notch Filter.
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Mains Hum Notch Filter PCB [01003261]
The PCB for the Mains Hum Notch Filter.
It's double-sided PCB with plated through holes, green solder mask and white silkscreen overlay.
129 x 101.5mm.
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Mains Hum Notch Filter PCB pattern (PDF download) [01003261]
A PDF with the PCB pattern for the Notch Filter.
It's a double-sided design and both layers are in a single PDF.
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Mains Hum Notch Filter short-form kit
This kit includes the PCB for the Notch Filter plus all onboard parts. It does not include the case or a power supply.
Six 47nF ±5% capacitors are included. Their values have not been checked but they came from the same sealed package and at least four of the six should be close in value. Trimpots are included rather than fixed resistors.
Photo shows the assembled PCB. See the link immediately below for a complete list of parts in the kit.
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