Frequency range (from dial): 150 KHz to 4.5 MHz
Mains power: 24 volts at 2 amps.
Aerial: Can be used with type 977 or 1160 loop aerials,
Comment: The Marconi Guardian receiver was part of a DF system but the goniometer that it was used with remains unidentified at this time.
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| Guardian receiver. (Photo courtesy John Wise, HMS Collingwood Museum) |