Num="2" name="B" type="passive"/> 2 pin Molex header Operational amplifier, DIP-8 | | | | R15, R17, R19 | 2 Internal clock with manual control. Clock in socket with amplifier to handle weaker (<6v) signals Clock out socket, with option to send to 16-pin cable when nothing is plugged into it. - Manual one-step-forward via momentary push.