She traced it to a tiny, intentional copper whisker hidden under the solder mask. Not a fab error— sabotage .
The Ghost in the Wireless Coil
It worked perfectly— better , even: RSSI improved by 2dB. bk m33 bt v2 pcb
Two days before the pilot production run, all test boards started failing. Not burning—just dying silently. Packet loss spiked, then the radios went deaf. She traced it to a tiny, intentional copper
She had the last known working "bk m33 bt v2 pcb" under the microscope. She traced it to a tiny