The DS3800NPPB printed circuit board is part of the Speedtronic Mark IV system. Mark IV is a part of the Mark series which is used to automate gas and steam turbines and protect the turbines from damage. The DS3800NPPB was made by GE (General Electric).
Three large inductors, or coils, are featured around the DS3800NPPB. Two of the inductors are paired together and connected by wires on the lower half of the DS3800NPPB. The other two inductors may be found on either end of the top half of the DS3800NPPB. Three green capacitors are arranged in a vertical row near at the bottom of the DS3800NPPB. Two brown capacitors may be found on the opposite side of the circuit board. One large metal diode is situated near the lower left corner of the DS3800NPPB. Five medium sized yellow capacitors are located on the DS3800NPPB. Five of these capacitors are positioned in the upper left corner of the DS3800NPPB. The remaining two of these capacitors are positioned at the top right corner of the DS3800NPPB. One long grey resistor is near the center of the top of the DS3800NPPB. This resistor is rectangular and has a resistance of ten watts (10w). The resistor is labeled with its part number IRC 8845. Three terminal blocks are attached to the DS3800NPPB. These terminal blocks are red in color. Two of the blocks contain twelve terminals each and the other contains five terminals. A number of very small diodes and capacitors are placed all around the DS3800NPPB.