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PCB pattern for the Ultrasonic Eavesdropper (PDF download) [01208061] PDF with the PCB design for the Ultrasonic Eavesdropper (single-sided). Cat No SC1604. Price: Free Files: Ultrasonic Eavesdropper PCB (01208061).pdf (21.9KB) Related to: Project: An Ultrasonic Eavesdropper (August 2006 [print issue] [online issue]) Other items relevant to this project: Ultrasonic Eavesdropper PCB [01208061] ($10.00) Add to trolley MC1496P double-balanced mixer IC (DIP-14) ($2.50) Add to trolley Ultrasonic Eavesdropper front panel artwork (PDF download) (Free) Add to trolley