The ES HPA-1 noval-octal electrostatic-headphone amplifier kit includes the PCB, four sets of hex standoffs and screws, all the resistors and capacitors (5), and two ceramic sockets. Kit comes with user guide that holds instruction and schematic.
The PS-8 circuit board was designed for those who need a high-voltage, bipolar power supply with two sets of regulated heater power supplies. On this seven by four inch, extra thick (0.094), 2oz-copper traces, USA-made PCB resides both a bipolar high-voltage power supply and two low-voltage regulators, with each finding its own raw power supply, including the rectifiers and power-supply reservoir capacitors. In other words, except for the power transformers, the PS-8 PCB holds all that is needed to make a fine tube-circuit power supply suitable for electrostatic headphone amplifiers.