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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. Cat No SC7597. Price: AUD $10.00 1 Log in to purchase In stock: yes (23 available). Estimated dispatch time: 1-3 days Related to: Project: Mains Hum Notch Filter (February 2026 [print issue] [online issue]) Other items relevant to this project: Mains Hum Notch Filter short-form kit ($40.00) LTspice simulation file for the Mains Hum Notch Filter (Free) Mains Hum Notch Filter PCB pattern (PDF download) [01003261] (Free)