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Dear friends,
I am looking for a circuit diagram of a VLF instrument which can be used for groundwater / mineral exploration works, especially in the range of 10-30 khz with the 90 deg. phase shifter and attenuater (for quadrature meassurement) circuits. Can anybody help me to find this ?. I can pay for the circuit (will be used only for research purposes),
Thanks,
Hemasri
Pl. reply to [email protected]
I am looking for a circuit diagram of a VLF instrument which can be used for groundwater / mineral exploration works, especially in the range of 10-30 khz with the 90 deg. phase shifter and attenuater (for quadrature meassurement) circuits. Can anybody help me to find this ?. I can pay for the circuit (will be used only for research purposes),
Thanks,
Hemasri
Pl. reply to [email protected]
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