ds3800ntbe

GE Speedtronic Mark IV DS3800NTBE is a Thermocouple Card as a part of the Mark IV Series. Thermocouples can be found all over the Mark IV system. The RST system, for example, distributes thirteen exhaust thermocouples: four to R, five to S, and four to T. Each of them calculates the median value and sends it back to the RST, implying that the turbine is controlled by thirteen thermocouples under normal operating conditions. The DS3800NTBE is marked for alignment and contains two PCB mating connectors on one edge.

• These are vertical pin mating connectors with the letters JA and JB on them. They're both 28-pin connections. The DS3800NTBE's circuit board contains 48 capacitors. This circuit board is devoid of resistors and diodes.
• The board has been drilled several times, both along its edge and across the center, but never through the waffle pattern engraved on the top layer. TBA, TBB, TBC, and TBD are the names of the four big thermocouple components that run parallel to the board's short dimension.