Marconi Instruments TF 2502 - Detector Unit

3.2 DETECTOR UNIT
The thermocouple detector is an in-line type consisting of a modified slab
transmission line with a tubular thin-film resistive heater component forming part
of the centre conductor. Four series connected thermocouples are mounted close
to the heater surface. Beryllia* cement is used in this assembly.
3.3 JW TERMINATING LOAD TM 8587
The terminating load see Fig. 1. 2 - is a thin-film component with a substrate
made of Beryllia*. This has the high thermal conductivity of aluminium combined
with excellent dielectric properties of an alumina ceramic. It is housed in a 3 W
heat sink.
*See warning in Sect. 4.2
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