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Transmit Coils Receive Coils Transmitter Electronics Receiver Termination Electronics

Outline. Transmit Coils Receive Coils Transmitter Electronics Receiver Termination Electronics Coil Assemblies. Transmitter Coils X,Y,Z. X:Outer Vert coil is 36 turns # 12, 2.86 mH . and the coil is 6.5 lbs. and 37 3/4" x 28”. Y: Inner Vert coil 3.1 mH, 36 turns #13, 3.1 mH . and

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Transmit Coils Receive Coils Transmitter Electronics Receiver Termination Electronics

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  1. Outline Transmit Coils Receive Coils Transmitter Electronics Receiver Termination Electronics Coil Assemblies

  2. Transmitter Coils X,Y,Z X:Outer Vert coil is 36 turns # 12, 2.86 mH. and the coil is 6.5 lbs. and 37 3/4" x 28”. Y: Inner Vert coil 3.1 mH, 36 turns #13, 3.1 mH. and the coil is 6.4 lbs .and 37 3/4" x 26 3/4”. Zs:H coil Upper 1.4 mH, 22 turns #12, 1.4 mH H coil Lower 1.4 mH, 22 turns #12, 1.4 mH H coils series, adding 3.0 mH, 44 turns #12 Horizontal coils weight is 16 lbs. , coils and frames are 39 1/8" square.

  3. Transmitter Pulser Schematic

  4. Transmit Coils

  5. Receive Coils (16 total) • 6” inner radius, 3/4” wide, 500 turns #26 formvar wire, wound on a Delrin spool. • The Resistance is 35 Ohms, the Inductance is ~70 mH., the uncompensated ring frequency is ~65 kHz., terminated with 10 foot shielded twisted pair. • The R/C network is tuned to ring at 15 kHz. and is critically damped. • An aluminum foil/ fiberglass tape is insulated/layered and provides a non-shorting shield. • An additional tape layer is the final covering. • The coil ties to a 3 pin plug:1-shield, 2-coil inner lead, 3-outer coil lead.

  6. Coil Termination Network

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