1. 2005 6 13 sm caus emm con co mil l 1 1 3 LED LED 60 mA 2 3 LED A MM JVC 0756 1 1 IC BA682AT TVU 0156 IC MAX667 2. BA682A DC10 14V 12 LED 130 mVrms 0dB 20 8dB 12 1 2 3 4 5 6 7 8 9 10 11 12 dB dB AC mVrms DC mV 15 10 7 5 3 1 0 1 3 5 8 23 41 58 73 92 116 130 146 184 231 32Z 1 1 20 13 17 30 54 76 96 120 151 170 191 240 302 42Z LED 1 R2 R2 27kC 15mA LED 1 R4 C2 e mail takutaku msb biglobe ne jp 1 2 BA682A R4 VR1 3. LED LED IC 12 V IC 10V MAX667 1 R5 7 10 5V MAX667 1 VCC 12V 2 SIGNAL 3 GND 2 5mm 3 Tip VCC Ring SIGNAL Sleeve GND