Parts placement on the component side of the circuit board. Note polarity of the 1uF tantalum capacitors. The 1N914 diode cathodes are indicated by the "k" or black bar. All square component solder points indicate a positive terminal, IC pin #1, or diode cathode. Flying leads connect the circled pads to appropriate connectors mounted on the box. Trim pots, P1 and P2, are 6 mm cermet.