The DS200TCQBG1BCB printed circuit board featured on this product page was specifically designed for use in the Mark V Series turbine control systems, as mentioned earlier.
The DS200TCQCG1BJF circuit board from General Electric is somewhat mysterious due to the variety of functions it is associated with in the original General Electric instructional documentation.
The DS3800NDAC1D1E is a component of General Electric's Speedtronic Mark IV Turbine series. One edge of the board is labeled with the letters A, B, C, D, E, F, G, H, and J.
The DS3800NGDD1C1B is a Field Ground Detector Card developed and manufactured by General Electric for the Mark IV Series within the GE Speedtronic Gas Turbine Control Systems.