GUARDIAN (Type 1193A)  Receiver
The Marconi Guardian receiver was part of a DF system but the goniometer that it was used with remains unidentified at this time

Frequency range (from dial): 150 KHz to 4.5 MHz

Guardian receiver. (Photo courtesy John Wise, HMS Collingwood Museum)

Contributors and Credits:

1) John Wise <jaceywise(at)>

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