Frequency Range- 250 to 546 KHz.
Dimensions:

H- 17 in
W- 17 in
D - 15 in

Weight: 66 lbs.

Power Consumption:

110VDC - 37 watts
220 VDC - 74 watts
24 V batteries - 54 to 60 watts

Lodestone RD101  (Instruction manual photo)

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Contributors and Credits:

1) Lodestone RD101 Instruction Manual extract published by Marconi International Marine, The Marconi International Marine Company Ltd. Marconi House, Chemsford, Essex, UK.

May 5/15