The DS3800NMSA is a printed circuit board from GE designed to function as an operational amplifier board for the Mark IV series. This series was designed for the management of steam and gas turbines. The efficiency of the Mark IV was an improvement over other systems of the same period, due to its ability to automate procedures like startup and shutdown, and its ability to limit downtime due to electronics failure--which was based upon its integrated chipsets built with intentional overlaps.
The DS3800NMSA is designed to accept an auxiliary board. The auxiliary connects to the motherboard via six board-to-board pins that parallel the short ends of the PCB and are supported by four nylon pins attached to DS3800NMSA.
The DS3800NMSA has one amber light emitting diode, seventeen TP test points, and ten integrated circuits. It is built with one Augat connector, which is a 28-pin female connector. The board also has one multi-pin PCB mating connector located along its left edge. This connector is numbered along its back edge 2/10/20/30/40/50/60/70/80.
The DS3800NMSA has been marked with letters along one edge for alignment. It is drilled in all corners. Extractor clips have been installed in both right corners. These clips protect components and circuitry by giving technicians a leverage point and/or a handle to grasp while working to insert or extract the PCB from tight locations. Four board stiffeners have been installed, one along the long dimension of the board, three along the short.
The DS3800NMSA has nine trim potentiometers located in a line, parallel to the left edge. Resistors on the board are both carbon composite and ceramic-covered metal film.
All technical support for the DS3800NMSA was provided by GE.