Marconi Ltd TF957/1 H.F. Absorption Wattmeter
This bit of test gear came from Marconi Ltd in the UK and it came in two versions: the TF957 for the European Market and the TF957/1 for North America. In US Military Service, it was known as the ME 5005/U.
This meter is what is used to test the Sender output of the 52-Set when it is in Low Power Mode. The meter comes in a large cast aluminium case with removable cover. The cover opens up to access the manual and the two test leads.
David
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